Academic literature on the topic 'Composite electrochemical coatings'
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Journal articles on the topic "Composite electrochemical coatings"
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Yudina, E. M., Yu E. Kisel, M. R. Kadyrov, and A. S. Serguntsov. "Service properties of composite electrochemical coating." MATEC Web of Conferences 344 (2021): 01022. http://dx.doi.org/10.1051/matecconf/202134401022.
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The article considers the ways of solving problems, regarding the rework and durability improvement of elements of industrial equipment. One of the ways to restore and improve the operational properties of machinery parts is the application of galvanic coatings, in particular, composite galvanic coatings. The article shows ways to improve the performance properties of composites, determines the optimal content of the dispersed phase in the composite, in terms of the ratio of the strength of the dispersed phase and matrix. The composite electrochemical coating wear resistance and the roughness of composites under conditions of abrasive wear have been explored. The relationship between the wear resistance and the surface roughness during wear has been determined. In an experimental study of the composite coatings abrasive wear resistance, it was found that their wear largely depends on the size and volume content of dispersed particles in the coating. It has been experimentally proven that the composite coating roughness depends on the matrix mechanical properties, the content and size of disperse particles.
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Kim, Sumin, Clare Chisu Byeon, and Sung Yeol Kim. "Electrochemical Response of Clay/Polyelectrolyte Composite Barrier Coatings." Coatings 10, no. 12 (November 30, 2020): 1173. http://dx.doi.org/10.3390/coatings10121173.
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Composite materials made of polymer and clay are effective at blocking mass transport. In this study, the blocking efficacy of layer-by-layer (LbL) coatings of exfoliated montmorillonite (MMT) and polyethylenimine (PEI) was studied using cyclic voltammetry and a redox couple, indigo carmine (IC). The pH of the MMT solution was varied from 4 to 10 to prepare LbL coatings of different surface roughness on metal substrates. It was found that the coated electrode had a lower redox peak current value than without the coating, demonstrating the reduction of the mass transport of IC to the metal surface. The peak values decreased with decreasing the coating’s roughness and increasing the number of layers, indicating that the blocking capability can be controlled by changing the deposition conditions. Smooth LbL coatings deposited with MMT at pH 4 showed the highest blocking efficacy up to 97.5%. The IC adsorbed at the interface between the coating and the metal substrate was found to cause the peak current measured for the coated electrode. It was also confirmed that the same coating on the copper substrate reduced the corrosion of the copper during the electrochemical potential cycling.
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Li, Mu Qin, Li Jie Qu, Chen Ma, and Shi Qin Yang. "Bioactive and Stability of Calcium Phosphate-Polypyrrole Composite Coatings by Electrochemical Deposition." Key Engineering Materials 368-372 (February 2008): 1198–200. http://dx.doi.org/10.4028/www.scientific.net/kem.368-372.1198.
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This study examined the bioactive and stability of calcium phosphate- polypyrrole(ppy) composite coatings on titanium alloys by electrochemically deposition in simulated body fluid (SBF). Change of coatings mass and SBF pH during coatings soaked in SBF indicated that ppy reduces the decomposition of coatings. The surface morphology of coatings characterized by SEM showed that the stability of composition coating was superior to that of single coating. XRD indicated that ppy induces CO3 2- enter calcium phosphate coating, which showed that the composite coatings possess better bioactive. Thus, this electrochemical deposition provides an effective method of ppy incorporation at physiological temperature, which can offer excellent bioactive and stability of coatings, with a potential for sustained release of therapeutic agents as required for metallic implant fixation.
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Degtyar, L. A., I. S. Ivanina, and I. Yu Zhukova. "Formation features of composite electrochemical nickel and nanostructured zirconium boride coatings." Vestnik of Don State Technical University 19, no. 1 (April 1, 2019): 31–37. http://dx.doi.org/10.23947/1992-5980-2019-19-1-31-37.
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Introduction.The electrodeposition of composite electrochemical coatings from electrolyte-colloid nickel plating containing ultradisperse zirconium boride powder is studied. The work objectives are as follows: to study mechanical-and-physical properties of the composites based on nickel and nanostructured zirconium boride, and to determine optimal conditions for the application of such electrochemical coatings.Materials and Methods.Microhardness of composite electrochemical coatings was measured using PMT-3 microhardness tester on samples with the layer thickness of 30 μm under the indentation load of 100 g. A three-ball machine was used to determine wear resistance of the coatings. Sample tests were carried out under dry friction modes and with the use of 3% RV coolant. WSD values were measured by MIR-3 TU 3-3.1954-86 microscope. To determine the internal stresses in the coating, we used a flexible cathode method up to GOST 9.302-88.Research Results.The electrolyte-colloid composition and modes of electrodeposition of composite nickel - nanostructured zirconium boride coatings are developed. Mechanicaland-physical properties (microhardness, wear resistance and internal stresses) of the obtained composite electrochemical coatings are analyzed. Recommendations for use of the developed electrolyte and the application of a composite coating on machine parts for their surface hardening are formulated.Discussion and Conclusions. Ni–ZrB2 CEC (composite electrochemical coating) has high microhardness (10–11 hPa at the indentation load of 100 g), which exceeds the microhardness of pure nickel by 1.5–2 times. As the microhardness increases, the internal stresses ofNi–ZrB2 CEC decrease. The proposed coatings were compared to chromium ones deposited from the environmentally hazardous electrolytes. The wear resistance ofNi–ZrB2 CEC is 2–5 times higher than that of chromium coatings. Thus, instead of chromic coatings, it is recommended to use the proposed composition for surface hardening of parts of the specialty machinery and industrial equipment
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Guryanov, G. V., and Yu Ye Kisel. "Laser treatment of composite electrochemical coatings." Traktory i sel hozmashiny 80, no. 4 (April 15, 2013): 53–55. http://dx.doi.org/10.17816/0321-4443-65906.
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Results of investigation of laser treatment effect on some mechanical properties of composite electrochemical coatings on the base of iron containing dispersal boron carbide inclusion are given. It was shown that thermal treatment leads to changes of composites microstructure and coatings wear resistance increase.
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Wen, Yu Qing, Hui Min Meng, Wei Shang, and Xiu Juan Jiang. "Electrochemical Characteristics of the Rare Earth Compound Coating on 6061 Aluminum Alloy." Applied Mechanics and Materials 71-78 (July 2011): 2361–65. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.2361.
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The composite coatings were prepared on aluminum alloy by anodizing and chemical conversion method. The coatings consisted of a anodic oxide coating and a rare earth conversion coating. The surface morphology and composition of the composite coatings were analyzed by scanning electron microscopy (SEM) and energy dispersive X-rays (EDX). The electrochemical properties of the different samples were researched by Potentiodynamic polarisation and electrochemical impedance spectroscopy in a 3.5-wt.% NaCl solution. The results showed that corrosion current density of the sample with composite coatings was 3.611×10-9 A·cm-2, impedance was 6.107×105 Ω·cm-2. The composite coatings had better corrosion resistance than the sample with anodic oxide film and the aluminum alloy substrate.
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Shang, Wei, Zhou Lan Yin, Yu Qing Wen, and Xu Feng Wang. "Corrosion Behavior of the Composite Coatings Prepared on Magnesium Alloy AZ91 in Na2SO4 Solution." Advanced Materials Research 900 (February 2014): 522–25. http://dx.doi.org/10.4028/www.scientific.net/amr.900.522.
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The composite coatings were obtained on a magnesium alloy by micro-arc oxidation (MAO) and sol-gel technique. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) were used to evaluate the corrosion behavior of MAO coating and composite coatings in a 3.5% Na2SO4 solution. The results show that corrosion behavior of the MAO coating and composite coatings are different at different immersion times. The corrosion resistance of composite coatings is good than that of MAO coating.
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Abakah, Randy, Feng Huang, Qian Hu, Yicong Wang, and Jing Liu. "Comparative Study of Corrosion Properties of Different Graphene Nanoplate/Epoxy Composite Coatings for Enhanced Surface Barrier Protection." Coatings 11, no. 3 (March 1, 2021): 285. http://dx.doi.org/10.3390/coatings11030285.
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Loading of graphene to polymeric materials has proven a widespread increase in the corrosion properties of nanocomposites. In this study, graphene nanoplatelets (Gnps)/epoxy composite coatings were prepared by incorporating three commercial graphene nanoparticles (C750, M15, and X50 Gnps) into epoxy resin. The morphological impact of the Gnps on the surface barrier protection were evaluated in terms of coating’s adhesion to the substate, hydrophobicity and water uptake performance. Salt spray resistance and Electrochemical Impedance Spectroscopy (EIS) authenticated that the coating integrated with C750 Gnp remarkably improved the anti-corrosion performance of neat epoxy composite coatings. A robust passive layer and surface barrier characteristics formed by the composite coatings incorporated with C750 nanoparticle should be the main reason for better protection properties offered by C750 Gnp/epoxy nanocomposites. At the same time, homogeneous dispersion and lesser agglomerates in C750 Gnp/epoxy composite coatings mainly contributed to the coating’s excessive corrosion resistance.
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Xu, Liping, Jinbing Song, Xiaofeng Zhang, Changguang Deng, Min Liu, and Kesong Zhou. "Microstructure and Corrosion Resistance of WC-Based Cermet/Fe-Based Amorphous Alloy Composite Coatings." Coatings 8, no. 11 (November 6, 2018): 393. http://dx.doi.org/10.3390/coatings8110393.
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There is an urgent need to improve the corrosion resistance of WC-based cermet coatings in different corrosive environments. The main objective of this work was to investigate the microstructure and evaluate the corrosion resistance in neutral, acidic, and alkaline electrolytes of the WC-based cermet/Fe-based amorphous alloy composite coating. Thus, a composite coating of WC–CoCr/Fe-based amorphous alloy and a single WC–CoCr coating were fabricated using the high-velocity oxygen fuel (HVOF) process. The phase composition, microstructure of the original powders, and as-sprayed coatings were studied. The detailed interface information between different compositions of the composite coating was observed by high-resolution transmission electron microscopy (HRTEM). The corrosion resistance of the coatings was studied comparatively by electrochemical tests in 3.5 wt % NaCl, 1 M HCl and 1 M NaOH solutions, respectively. Results showed that the composited coating had a dense layered structure with a composition of WC, Fe-based amorphous alloy, and small amount of W2C. It was revealed that obvious inter-diffusion exists between the interfaces of tungsten carbide/Co, Cr binder and WC–CoCr/Fe-based amorphous alloy. The electrochemical test results showed that the composite coating displayed better corrosion resistance than single WC–CoCr coating both in 3.5 wt % NaCl solution and in 1 M NaOH solution.
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Shang, Wei, Zhou Lan Yin, Yu Qing Wen, and Xu Feng Wang. "Impedance Behavior of the Composite Coatings Prepared on Magnesium Alloy AZ91 in Simulated Seawater Solution." Advanced Materials Research 900 (February 2014): 526–30. http://dx.doi.org/10.4028/www.scientific.net/amr.900.526.
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The composite coatings were obtained on a magnesium alloy by micro-arc oxidation and sol-gel technique. Electrochemical impedance spectroscopy (EIS) was used to evaluate the corrosion behavior of MAO coating and composite coatings in a simulated seawater solution. The results show that corrosion behavior of the MAO coating and composite coatings are different at different immersion times. Corrosion protection of the MAO coating gradually weaken with the extension of soaking time, but corrosion protection of the composite coatings become stronger first and then weaken.
Dissertations / Theses on the topic "Composite electrochemical coatings"
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Corni, Ilaria. "Deposition of composite coatings by electrochemical means." Thesis, Imperial College London, 2009. http://hdl.handle.net/10044/1/11983.
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AKUNDY, GOURI. "DEPOSITION OF POLYANILINE-POLYPYRROLE COMPOSITE COATINGS ON ALUMINUM." University of Cincinnati / OhioLINK, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=ucin990562534.
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RAJAGOPALAN, RAMAKRISHNAN. "EFFECT OF ELECTROCHEMICAL DEPOSITION PARAMETERS ON THE SYNTHESIS, STRUCTURE AND PROPERTIES OF POLYANILINE-POLYPYRROLE COMPOSITE COATINGS ON STEEL." University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1010081894.
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Skoorka, Michelle E. "The effect of humidity on composite lap joints and an electrochemical study on coatings and galvanic systems /." View online ; access limited to URI, 2004. http://0-wwwlib.umi.com.helin.uri.edu/dissertations/dlnow/3135915.
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Gajjela, Pavan. "Effect of Electrochemical Process Parameters on the Properties of Polyaniline/polypyrrole Coatings on Stainless Steel." Cincinnati, Ohio : University of Cincinnati, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=ucin1097451143.
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Овчаренко, Ольга Олександрівна. "Композиційні електрохімічні покриття на основі міді та нікелю, модифіковані ультрадисперсними частинками." Thesis, НТУ "ХПІ", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/22725.
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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.17.03 – технічна електрохімія. – Національний технічний університет "Харківський політехнічний інститут", м. Харків, 2016 р.
Дисертація присвячена розробці технології композиційних електрохімічних покриттів на основі міді та нікелю, армованих нанорозмірним оксидом алюмінію. Запропоновано технологічну схему формування композитів Cu-Al₂O₃ та Ni-Al₂O₃. Запропоновано метод хімічного диспергування корунду з отриманням гідрозолю Al₂O₃. Встановлено закономірності електрохімічних процесів осадження мідних та нікелевих композиційних покриттів. Визначено вплив концентрації дисперсної фази в електролітах-суспензіях на фізико-механічні властивості матеріалів, такі як мікротвердість, межа міцності та межа текучості. Встановлено, що отримані композити мають значно вищий рівень міцності при досить низьких концентраціях Al₂O₃ в електроліті (1-2 г/дм³), у порівнянні зі зразками, отриманими з додаванням грубодисперсного оксиду алюмінію. Результати атомносилової мікроскопії дозволили визначити розмір кристалітів та оцінити топографію поверхні покриттів, встановлено вплив вмісту корунду на склад та морфологію покриттів, а результати електронної мікроскопії вказують на збереження кристалічної гратки.Thesis for granting the Degree of Candidate of Technical sciences in specialty 05.17.03 – Technical Electrochemistry. – National Technical University "Kharkiv Polytechnic Institute". Kharkiv, 2016. Dissertation is devoted to development of the technology of composite electrochemical coatings based on copper and nickel, reinforced nanoscale aluminium. The method of chemical dispersion to produce a hydrosol of corundum Al2O3 is proposed. Electrochemical processes regularities of the copper and nickel composite coatings deposition have established. The influence of a dispersed phase concentration in electrolytes-suspensions on the physico-mechanical properties of materials, such as microhardness, tensile strength and yield strength, has detected. It has shown the resulting composites have higher strength at sufficiently low concentrations in the Al₂O₃-electrolyte (1-2 g/dm³) compared with samples obtained by the introduction of the coarse-dispersion aluminium electrolyte. The influence of the corundum content on the composition and morphology of coatings has been found experimentally. The electron microscopy results detects to a continuation of a crystal lattice. The results of atomic force microscopy have allowed to determine the crystallite size and evaluate the topography of the surface. The flowchart of the electrochemical formation of Cu-Al₂O₃ and Ni-Al₂O₃ composites are proposed.
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Овчаренко, Ольга Олександрівна. "Композиційні електрохімічні покриття на основі міді та нікелю, модифіковані ультрадисперсними частинками." Thesis, НТУ "ХПІ", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/22724.
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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.17.03 – технічна електрохімія. – Національний технічний університет "Харківський політехнічний інститут", м. Харків, 2016 р.
Дисертація присвячена розробці технології композиційних електрохімічних покриттів на основі міді та нікелю, армованих нанорозмірним оксидом алюмінію. Запропоновано технологічну схему формування композитів Cu-Al₂O₃ та Ni-Al₂O₃. Запропоновано метод хімічного диспергування корунду з отриманням гідрозолю Al₂O₃. Встановлено закономірності електрохімічних процесів осадження мідних та нікелевих композиційних покриттів. Визначено вплив концентрації дисперсної фази в електролітах-суспензіях на фізико-механічні властивості матеріалів, такі як мікротвердість, межа міцності та межа текучості. Встановлено, що отримані композити мають значно вищий рівень міцності при досить низьких концентраціях Al₂O₃ в електроліті (1-2 г/дм³), у порівнянні зі зразками, отриманими з додаванням грубодисперсного оксиду алюмінію. Результати атомносилової мікроскопії дозволили визначити розмір кристалітів та оцінити топографію поверхні покриттів, встановлено вплив вмісту корунду на склад та морфологію покриттів, а результати електронної мікроскопії вказують на збереження кристалічної гратки.Thesis for granting the Degree of Candidate of Technical sciences in specialty 05.17.03 – Technical Electrochemistry. – National Technical University "Kharkiv Polytechnic Institute". Kharkiv, 2016. Dissertation is devoted to development of the technology of composite electrochemical coatings based on copper and nickel, reinforced nanoscale aluminium. The method of chemical dispersion to produce a hydrosol of corundum Al2O3 is proposed. Electrochemical processes regularities of the copper and nickel composite coatings deposition have established. The influence of a dispersed phase concentration in electrolytes-suspensions on the physico-mechanical properties of materials, such as microhardness, tensile strength and yield strength, has detected. It has shown the resulting composites have higher strength at sufficiently low concentrations in the Al₂O₃-electrolyte (1-2 g/dm³) compared with samples obtained by the introduction of the coarse-dispersion aluminium electrolyte. The influence of the corundum content on the composition and morphology of coatings has been found experimentally. The electron microscopy results detects to a continuation of a crystal lattice. The results of atomic force microscopy have allowed to determine the crystallite size and evaluate the topography of the surface. The flowchart of the electrochemical formation of Cu-Al₂O₃ and Ni-Al₂O₃ composites are proposed.
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Lapushkina, Elizaveta. "Anti-corrosion coatings fabricated by cold spray technique : Optimization of spray condition and relationship between microstructure and performance." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI054.
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Des revêtements anticorrosion de zinc et d'aluminium ont été développés respectivement par des techniques de pulvérisation à froid à haute pression et à basse pression. Pour les revêtements de zinc, la dépendance de la température de pulvérisation sur l'épaisseur a été analysée et la température critique de dépôt a été trouvée à 230°C. Des variations de pression de 2 MPa, 2,5 MPa et 3 MPa à température constante 290 °C ont montré la valeur d'épaisseur de couche plus élevée à 2 MPa. Il a été également confirmé que l'épaisseur du revêtement à tendance à diminuer avec la pression. Le taux d'alimentation en poudre ainsi que la distance de pulvérisation ont également été considérés comme des paramètres influençant l'épaisseur. Les conditions optimales de projection ont été trouvées pour 3 rps et 30 mm, respectivement. Enfin, la température et la pression du gaz ont été optimisées par le plan d’experience dit de Doehlert. Leurs influences sur la qualité du revêtement de zinc ont été discutées en termes de microstructure, de porosité, d'épaisseur et de résistance à la corrosion. Une porosité maximale de 4,2% a été atteinte avec la pression la plus élevée et avec une température modérée (260 ° C < T < 300 ° C). Ces conditions favorisait l'érosion du substrat et la faible déformation des particules lors de l'impact. Deux conditions optimales ont ainsi été trouvées: 320 ° C – 2,5 MPa et 260 ° C – 2,5 MPa. Des expériences électrochimiques macroscopiques et locales ont été ensuite réalisées. Une résistance à la corrosion plus élevée a été détectée pour la condition 320 ° C – 2,5 MPa. Les revêtements étaient alors suffisamment épais pour protéger le substrat et le mécanisme de corrosion était liée au comportement des couches d'hydroxyde et d'oxyde de Zn. Il est a noter que la rugosité du revêtement devra être pour réduire l'amorçage de la corrosion. Pour les revêtements d'aluminium, les paramètres de déposition optimaux ont été trouvés à 400 ° C / 0,65 MPa. Des particules de céramique ont été ajoutées pour densifier le revêtement permettant une réduction de porosité de 8% à 6,4%. Un traitement de surface par laser a été ensuite effectué. Dans ce travail, la puissance du laser s’est révelée insuffisante pour atteindre le point de fusion de l’aluminium, cependant, la dureté des revêtement a pu être modifée. Les résultats ont montré une augmentation de la microdureté des revêtements de 5% avec l'ajout de particules céramiques tandis qu’une réduction de dureté de 39% et 35% a été mesurée sur le revêtement en aluminium pur et composite respecitvement. La diminution de dureté lors le traitement au laser a été attribuée au recuit de surface, à la libération de contraintes internes et à une possible recristallisation locale. Enfin, les caractérisations électrochimiques ont montré une résistance à la corrosion plus élevée pour les revêtements composites céramiques que l'aluminium pur et les revêtements traités au laserAnticorrosion coatings of Zinc and Aluminium were developed by high pressure and low-pressure Cold Spray techniques, respectively. For Zinc coatings, the dependence of spraying temperature on thickness has been analyzed and the critical temperature of deposition was found at 230 oC. For lower temperatures, the coating was considerably thinner. Dependence of thickness on pressure variation 2 MPa, 2,5 MPa and 3 MPa at constant temperature 290 oC has shown the highest thickness value at 2 MPa. It was confirmed that the coating thickness tends to decrease with the pressure rise. The powder feeding rate as well as the spraying distance were also considered to influence the thickness. The optimal conditions were found for 3ps and 30 mm, respectively. Finally, the gas temperature and pressure were optimized by a Doehlert uniform shell design. Their influences on the zinc coating quality were discussed in terms of microstructure, porosity, thickness, and corrosion resistance. A maximum porosity of 4.2% was reached with the highest pressure and with a moderate temperature (260 °C < T < 300 °C). These conditions promoted erosion of the substrate and a lower accommodation of particles at the impact. Thicker coatings were obtained at higher temperatures because of better particle straining. Two optimal conditions were then identified: 320 °C–2.5 MPa and 260 °C–2.5 MPa. Macroscopic and local electrochemical experiments were performed. Higher corrosion resistance was detected for the condition 320 °C–2.5 MPa. Coatings were enough thick to protect the substrate and the corrosion mechanism was driven by the classical Zn hydroxide and oxide layers. Note that the coating roughness may be optimized later to reduce the corrosion initiation. For aluminum coatings deposited by a low-pressure cold spray method, the optimal spraying parameters according to deposition efficiency were found at 400 °C /0.65 MPa. Ceramic particles were added to densify the coating and allowed to reduce porosity from 8% to 6.4%. Instead of ceramic particle addition, laser surface treatment was performed after coating design. Laser power was not enough high to reach the surface melting, however, the coating microhardness was modified. Results showed a microhardness increase of coatings of 5% with the addition of hard particles whereas the microhardness decreased after the post-heat treatment (pure aluminum coating reduction of 39% and for composite coating 35%). The hardness reduction during the laser treatment was attributed to surface annealing and the release of internal stresses and possible recrystallization with the subsequent grain growth. Finally, the results of the electrochemical investigations showed higher corrosion resistance of ceramic composite coatings than both pure aluminum and laser-treated coatings
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Штефан, Вікторія Володимирівна. "Електрохімічні процеси в технології функціональних молібден- та вольфрамвмісних покриттів." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/41358.
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Дисертація на здобуття наукового ступеня доктора технічних наук за спеціальністю 05.17.03 – технічна електрохімія. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2019 р.
Дисертацію присвячено розробці наукових основ електрохімічних процесів в технології функціональних молібден- та вольфрамвмісних покриттів. Висунуто і експериментально доведено гіпотезу про можливість керування природою електрохімічних процесів, за участю іонів молібдену (VI) та вольфраму (VI), пов'язана з досягненнями в дослідженні стану форм їх іонів у водних розчинах. Доведено вплив природи оксоаніону молібдену на кінетику катодних процесів в комплексних електролітах в широкому діапазоні рН: аміачно-пірофосфатний (рН>7) та аміачно-трилонатний (рН<7). Розвинуті уявлення про керований вплив формою оксоаніонів молібдену на поляризацію катодного процесу для зміни лімітуючої стадії. Підтверджено, що катодні процеси при осадженні сплаву Со-Мо включають відновлення оксоаніонів молібдену за рахунок не тільки електрохімічної стадії, але за участю окисно-відновних реакцій, де відновниками виступають продукти суміщених електродних реакцій – кобальт та адсорбований водень. Визначено вплив складу електролітів, та параметрів електролізу на функціональні властивості покриттів (корозійну стійкість, мікротвердість, каталітичну активність в реакції конверсії СО та електрохімічного виділення вод-ню). Експериментально опрацьовано склади електролітів для створення конверсійних покриттів на поверхнях срібла та сплаві Д16. Доведено, що зміна рН в електроліті наповнення анодно-оксидних покриттів на сплаві Д16 змінює форму оксоаніонів і підвищує корозійну стійкість системи. Встановлено, що зі збільшенням концентрації тіосульфату потенціал срібла зсувається в бік негатив-них значень за рахунок утворення [Ag(S2O3)n](2n+1)-, що дає можливість перебігу окисно-відновних реакцій за участю іонів вольфраму та срібла. Застосування пасиватора поверхні срібла на основі вольфрамату в 2 рази ефективніше пасиватора на основі хромату. Одержано каталізатор Ti|TiOx·WOp·CeOy·ZrOz·CuOn, який відзначається високою активністю конверсії СО (до 95% при 420 °C). Анодно-оксидні покриття на ОТ4-0, що містять сполуки молібдену демонструють зниження провідності та термостійкість анодного шару. Оксидні покриття, що сформовані з молібденвмісного електроліту на сталі 08Х18Н10, мають електричний опір ізоляції 2,6·1010…3,6·1010 Ом. Ефективність наукового доробку доведена позитивними результатами лабораторно-промислових випробувань та впровадження.Thesis for granting the Degree of Doctor of Technical sciences in speciality 05.17.03 – Technical Electrochemistry. – National Technical University "Kharkiv Politechnical Institute", 2019. The dissertation is devoted to the development of scientific principles of electro-chemical processes in the technology of functional molybdenum and tungsten-containing coatings. The hypothesis of the possibility of controlling the nature of electrochemical processes, with the participation of molybdenum (VI) ions and tungsten (VI) associated with the achievements in the study of the state of the forms of their ions in aqueous solutions is formed and experimentally proved. The influence of the nature of molybdenum oxyanion on the kinetics of cathode processes in complex electrolytes within a wide range of pH: ammonium pyrophosphate (pH> 7) and ammonia-trilonate (pH <7) is proved. The understanding of the controlled influence with the form of molybdenum oxoanions on the polarization of the cathode process for the change of the limiting stage is developed. It has been confirmed that the cathode processes in the precipitation of the Co-Mo alloy include the restoration of molybdenum oxoanions due to not only the electrochemical stage but with the participation of oxi-dation-reduction reactions in which the reduction products are those of combined electrode reactions - cobalt and adsorbed hydrogen. The influence of the electrolytes composition and electrolysis parameters on functional properties of coatings (corrosion resistance, microhardness, catalytic activity in the reaction of CO conversion and electrochemical hydrogen release) is determined. The compositions of electrolytes are treated experimentally to create conversion coatings on silver surfaces and D16 alloy. It is proved that the change of pH in the electrolyte of the anode-oxide coating on the D16 alloy changes the form of oxoanions and increases the corrosion re-sistance of the system. It is established that with the thiosulfate concentration in-crease, the silver potential moves toward negative values due to the formation of [Ag(S2O3)n](2n+1)-, which allows the process of oxidation-reduction reactions involv-ing tungsten and silver polyanions. The use of a silver surface tester on the basis of tungstate is 2 times more efficient than a chromate-based passivator. A catalyst is obtained for the Ti|TiOx·WOp·CeOy·ZrOz·CuOn composition, which is characterized by high conversion activity of CO (up to 95% at 420 °C). Anodic oxide coatings on OT4-0 containing molybdenum compounds exhibit suppressed conductivity and heat resistance of the anode layer. The oxide coatings formed from the molybdenum-containing electrolyte on a steel 08Х18Н10 have an electrical resistance of 2.6·1010…3.6·1010 Ω. The effectiveness of scientific study is proved by the positive results of laboratory and industrial testing and implementation.
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Штефан, Вікторія Володимирівна. "Електрохімічні процеси в технології функціональних молібден- та вольфрамвмісних покриттів." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2019. http://repository.kpi.kharkov.ua/handle/KhPI-Press/41356.
Full textAbstract:
Дисертація на здобуття наукового ступеня доктора технічних наук за спеціальністю 05.17.03 – технічна електрохімія. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2019 р.
Дисертацію присвячено розробці наукових основ електрохімічних процесів в технології функціональних молібден- та вольфрамвмісних покриттів. Висунуто і експериментально доведено гіпотезу про можливість керування природою електрохімічних процесів, за участю іонів молібдену (VI) та вольфраму (VI), пов'язана з досягненнями в дослідженні стану форм їх іонів у водних розчинах. Доведено вплив природи оксоаніону молібдену на кінетику катодних процесів в комплексних електролітах в широкому діапазоні рН: аміачно-пірофосфатний (рН>7) та аміачно-трилонатний (рН<7). Розвинуті уявлення про керований вплив формою оксоаніонів молібдену на поляризацію катодного процесу для зміни лімітуючої стадії. Підтверджено, що катодні процеси при осадженні сплаву Со-Мо включають відновлення оксоаніонів молібдену за рахунок не тільки електрохімічної стадії, але за участю окисно-відновних реакцій, де відновниками виступають продукти суміщених електродних реакцій – кобальт та адсорбований водень. Визначено вплив складу електролітів, та параметрів електролізу на функціональні властивості покриттів (корозійну стійкість, мікротвердість, каталітичну активність в реакції конверсії СО та електрохімічного виділення вод-ню). Експериментально опрацьовано склади електролітів для створення конверсійних покриттів на поверхнях срібла та сплаві Д16. Доведено, що зміна рН в електроліті наповнення анодно-оксидних покриттів на сплаві Д16 змінює форму оксоаніонів і підвищує корозійну стійкість системи. Встановлено, що зі збільшенням концентрації тіосульфату потенціал срібла зсувається в бік негатив-них значень за рахунок утворення [Ag(S2O3)n](2n+1)-, що дає можливість перебігу окисно-відновних реакцій за участю іонів вольфраму та срібла. Застосування пасиватора поверхні срібла на основі вольфрамату в 2 рази ефективніше пасиватора на основі хромату. Одержано каталізатор Ti|TiOx·WOp·CeOy·ZrOz·CuOn, який відзначається високою активністю конверсії СО (до 95% при 420 °C). Анодно-оксидні покриття на ОТ4-0, що містять сполуки молібдену демонструють зниження провідності та термостійкість анодного шару. Оксидні покриття, що сформовані з молібденвмісного електроліту на сталі 08Х18Н10, мають електричний опір ізоляції 2,6·1010…3,6·1010 Ом. Ефективність наукового доробку доведена позитивними результатами лабораторно-промислових випробувань та впровадження.Thesis for granting the Degree of Doctor of Technical sciences in speciality 05.17.03 – Technical Electrochemistry. – National Technical University "Kharkiv Politechnical Institute", 2019. The dissertation is devoted to the development of scientific principles of electro-chemical processes in the technology of functional molybdenum and tungsten-containing coatings. The hypothesis of the possibility of controlling the nature of electrochemical processes, with the participation of molybdenum (VI) ions and tungsten (VI) associated with the achievements in the study of the state of the forms of their ions in aqueous solutions is formed and experimentally proved. The influence of the nature of molybdenum oxyanion on the kinetics of cathode processes in complex electrolytes within a wide range of pH: ammonium pyrophosphate (pH> 7) and ammonia-trilonate (pH <7) is proved. The understanding of the controlled influence with the form of molybdenum oxoanions on the polarization of the cathode process for the change of the limiting stage is developed. It has been confirmed that the cathode processes in the precipitation of the Co-Mo alloy include the restoration of molybdenum oxoanions due to not only the electrochemical stage but with the participation of oxi-dation-reduction reactions in which the reduction products are those of combined electrode reactions - cobalt and adsorbed hydrogen. The influence of the electrolytes composition and electrolysis parameters on functional properties of coatings (corrosion resistance, microhardness, catalytic activity in the reaction of CO conversion and electrochemical hydrogen release) is determined. The compositions of electrolytes are treated experimentally to create conversion coatings on silver surfaces and D16 alloy. It is proved that the change of pH in the electrolyte of the anode-oxide coating on the D16 alloy changes the form of oxoanions and increases the corrosion re-sistance of the system. It is established that with the thiosulfate concentration in-crease, the silver potential moves toward negative values due to the formation of [Ag(S2O3)n](2n+1)-, which allows the process of oxidation-reduction reactions involv-ing tungsten and silver polyanions. The use of a silver surface tester on the basis of tungstate is 2 times more efficient than a chromate-based passivator. A catalyst is obtained for the Ti|TiOx·WOp·CeOy·ZrOz·CuOn composition, which is characterized by high conversion activity of CO (up to 95% at 420 °C). Anodic oxide coatings on OT4-0 containing molybdenum compounds exhibit suppressed conductivity and heat resistance of the anode layer. The oxide coatings formed from the molybdenum-containing electrolyte on a steel 08Х18Н10 have an electrical resistance of 2.6·1010…3.6·1010 Ω. The effectiveness of scientific study is proved by the positive results of laboratory and industrial testing and implementation.
Book chapters on the topic "Composite electrochemical coatings"
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Li, Mu Qin, Li Jie Qu, Chen Ma, and Shi Qin Yang. "Bioactive and Stability of Calcium Phosphate-Polypyrrole Composite Coatings by Electrochemical Deposition." In High-Performance Ceramics V, 1198–200. Stafa: Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/0-87849-473-1.1198.
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Wang, Hui, Chang Jian Lin, Ren Hu, Qing Ye, and Hui Juan Han. "Electrochemically-Induced Deposition of Protein and Calcium Phosphate Coating on Titanium." In Advances in Composite Materials and Structures, 1253–56. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-427-8.1253.
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Lekka, M. "Electrochemical Deposition of Composite Coatings." In Encyclopedia of Interfacial Chemistry, 54–67. Elsevier, 2018. http://dx.doi.org/10.1016/b978-0-12-409547-2.11716-0.
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Wang, Yuxin, and Wei Gao. "Nanocomposite Coatings Deposited by Sol-Enhanced Electrochemical Methods." In Electrodeposition of Composite Materials. InTech, 2016. http://dx.doi.org/10.5772/62042.
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"Electrochemical Deposition for Self-Lubricating Metal Composite Coatings." In Encyclopedia of Tribology, 922. Boston, MA: Springer US, 2013. http://dx.doi.org/10.1007/978-0-387-92897-5_100404.
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Ruhi, Gazala, and Sundeep K. Dhawan. "Conducting Polymer Nano Composite Epoxy Coatings for Anticorrosive Applications." In Modern Electrochemical Methods in Nano, Surface and Corrosion Science. InTech, 2014. http://dx.doi.org/10.5772/58388.
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Fessmann, J., D. Mann, G. Kampschulte, F. Leyendecker, T. Bolch, K. Mertz, D. Jonke, F. J. Gammel, M. Meyer, and R. Suchentrunk. "Adherent metallization of carbon-fibre-reinforced plastic composites using a combined vacuum/electrochemical deposition process." In Metallurgical Coatings and Thin Films 1992, 599–603. Elsevier, 1992. http://dx.doi.org/10.1016/b978-0-444-89900-2.50107-x.
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Mathai, Suja. "An Efficient Electrochemical Approach for the Characterization of Interfacial Strength of Nano Titania-silica Composite Coating on Titanium Implants." In Current Advances in Chemistry and Biochemistry Vol. 9, 50–62. Book Publisher International (a part of SCIENCEDOMAIN International), 2021. http://dx.doi.org/10.9734/bpi/cacb/v9/2847f.
Full textConference papers on the topic "Composite electrochemical coatings"
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Milanti, A., H. Koivuluoto, P. Vuoristo, G. Bolelli, F. Bozza, and L. Lusvarghi. "Wear and Corrosion Resistance of High-Velocity Oxygen-Fuel Sprayed Iron-Based Composite Coatings." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63397.
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Thermally sprayed iron-based coatings are being widely studied as alternative solution to conventional hardmetal (cermet) and Ni-based coatings for wear and corrosion applications in order to reduce costs, limit environmental impact and enhance the health safety. The aim of the present work is to study the cavitation erosion behaviour in distilled water and the corrosion properties in acidic solution of four high-velocity oxy-fuel (HVOF) sprayed Fe-based composite coatings. Fe-Cr-Ni-B-C powder was selected for its good sliding wear properties. In addition, a powder composition with an addition of Mo was studied in order to increase the corrosion resistance whereas additions of 20 wt. % and 40 wt. % WC-12Co as blended powder mixtures were investigated in order to increase wear resistance. Improvement of coating properties was significant with the advanced powder compositions. Dense coating structures with low porosity were detected with microstructural characterization. In addition, good cavitation wear resistance was achieved. The cavitation resistance of customized Fe-based coating with Mo addition was reported to be twice as high as that of conventional Ni-based and WC-CoCr coatings. The corrosion properties of HVOF Fe-based coatings were also evaluated by studying electrochemical behaviour in order to analyse their potential to use as corrosion barrier coatings.
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Lester, T., D. J. Kingerley, S. J. Harris, and S. P. Matthews. "Thermally Sprayed Composite Coatings for Enhanced Corrosion Protection of Steel Structures." In ITSC 1998, edited by Christian Coddet. ASM International, 1998. http://dx.doi.org/10.31399/asm.cp.itsc1998p0049.
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Abstract Zinc and aluminium coatings have been used widely to protect steel structures from corrosion in aggressive and hostile conditions. The more recent development of zinc 15wt% aluminium alloy in a wire form has demonstrated that arc-spray coatings can be produced with a resistance to red rust which is superior to that of the single metals. Competitive 'pseudo' alloy or composite coatings produced by co-spraying wires of zinc and aluminium have been shown to achieve resistance to salt spray conditions similar to this conventional alloy. Work described in this paper confirms these findings and goes on to demonstrate an additional advantage of co-spraying an aluminium -5wt% magnesium instead of aluminium with the zinc. The importance of providing a fine dispersion of the two phases in the 'pseudo' alloy is highlighted and an alternative method of providing a similar dispersion by using a 'cored' wire (e.g. Al-5wt%Mg wire in a zinc sheath) approach has been demonstrated. The importance of 'self sealing' in these coatings after the initial loss of zinc is discussed which is related to the coating microstructure and their electrochemical behaviour in chloride solutions.
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Chakraborty, Rajib, Susmita Datta, Mohammad Shahid Raza, and Partha Saha. "Improvement of Ionic Bonding Strength and Electrochemical Corrosion Resistance of Hydroxyapatite- Calcium Phosphate Pulsed Electrochemically Deposited In-Situ Coating Through Hydroxyl Ion Treatment." In ASME 2018 13th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/msec2018-6582.
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Hydroxyl ion treatment of different hydroxyapatite-calcium hydrogen phosphate composite in-situ coatings synthesized through pulsed electro-deposition with varying amount of hydroxyapatite phase and degree of crystallinity were carried out with the help of highly basic solution in order to achieve a more chemically stable and corrosion resistance performance under contact with body fluid. The coatings exhibit altogether completely different behaviour in terms of bond formation, surface topography generation, phase transformation and corrosion behaviour. Detailed characterizations of formed top surface layer were carried out with the help of XRD, SEM and FTIR in order to correlate the results with their base surface characteristics. Transformation of <020> and <121> surface parallel planes of calcium hydrogen phosphate in to <002> and <112> planes of hydroxyapatite took place in all the coatings along with formation of nano-crystalline structure. Calcium-rich porous hydroxyapatite scaffold formation takes place in low current density coating which in general exhibits low stability in terms of chemical bonding strength vis-à-vis corrosion protection performance. 10 mA/cm2 coating, which come with optimum presence of hydroxyapatite phase and crystallinity post electro-deposition, showed significant improvement in terms of increasing hydroxyl and phosphate bond polarization strength of hydroxyapatite phase and the same lead to improvement in the overall corrosion resistance performance of the coating by two times. Despite of formation of highest amount of hydroxyapatite phase during hydroxyl ion treatment in 20 mA/cm2 coatings, the corrosion protection performance results are negative on account of dilution of mostly low bonding amorphous phases with high internal residual stress.
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Nawaz, Muddasir, Sehrish Habib, Adnan Khan, Abdul Shakoor, and Ramazan Kahraman. "Cellulose microfibers (CMFs) reinforced smart self-healing polymeric composite coatings for corrosion protection of steel." In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2020. http://dx.doi.org/10.29117/quarfe.2020.0003.
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The use of organic coating for the metals has been widely being used to protect the surface against corrosion. Polymeric coating incorporated with Nanocontainers loaded with inhibitor and self-healing provides better corrosion resistance. Cellulose microfibers (CMFs) used as smart carriers were synthesized and loaded with dodecylamine (DOC)-inhibitor and polyethyleneimine (PEI)-both inhibitor and self-healing agents. Smart polymeric coatings were developed by mixing CMF/DOC and CMFs/PEI into the epoxy matrix. Reference coatings (that has only CMFs) were also prepared for a compersion. Scanning electron microscope (SEM), X-ray diffraction spectroscopy (XRD), Fourier transform infrared spectroscopy (FTIR) and thermal gravitational analysis (TGA) were used to confirm the loading of DOC and PEI onto the CMFs. UV-vis analysis indicates that the self-release of inhibitor from CMFs is sensitive to pH of the solution and the immersion time. Recovery of controlled surface damage confirms the decent self-healing ability of the prepared smart coatings is due to the efficient release of inhibitor (DOC) and self-healing agent (PEI) in the damaged area leading to the formation of a protective film. Electrochemical impedance spectroscopy (EIS) results demonstrate that corrosion resistance of the smart coating increases with an increase in immersion time which is due to the progressive release of inhibitors from CMFs in response to the pH change. Therefore, smart coatings demonstrate superior properties as compared to the reference coatings. The study reveals the polymeric composite coatings have potential to inhibit the corrosion of steel for oil and gas industry.
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Fayyaz, Osama, Khurra Shahzad, Tooba Qureshi, Izza Fatima, Abdul Shakoor, and El Sadig Mahdi. "Synthesis and Characterization of Ni-P/Tic Composite Coating through one Step Co- Electrodeposition." In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2020. http://dx.doi.org/10.29117/quarfe.2020.0082.
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Coatings are considered to be a promising solution for the corrosion and wear in various industries. NiP coatings are well known for their anticorrosive behavior but lack mechanical strength. In present study, the effect of sub microscale TiC particles on the structural, morphological, mechanical and electrochemical analysis of Ni-P/TiC coating were carried out through X-ray diffraction(XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), Vickers microhardness, nanoindentation and potentiodynamic polarization test on Gamry. Co-electrodeposition of the Ni-P/TiC with varying the composition of TiC namely 0.5, 1.0, 1.5 and 2.0g/L. The depostion conditions were optimized for pH, temperature and current density. The surface morphology of coat represents nodular structure with TiC particles embedded in it without any defects. Structural analysis proves the amorphous nature of the coating. Vickers microhardness is observed to increase with the composition and attains highest value at 1.5g/L of TiC in the chemical bath. Nanoindentation results are in agreement with the hardness result. Thus, improvement in mechanical properties of the Ni-P coating is achieved without affecting its corrosion resistance.
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Fayyad, Eman, Aboubakr Abdullah, Mohamed Hassan, Abdul Rasheed Pathath, Khaled Mahmoud, George Jarjoura, and Zoheir Farhat. "Novel Electroless Deposited Corrosion – Resistant and Anti-Bacterial NiP–TiNi Nanocomposite Coatings." In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2020. http://dx.doi.org/10.29117/quarfe.2020.0009.
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From acidic NiP electroless bath, the co-deposition of TiNi nanoparticles in the NiP matrix to form novel NiP-TiNi nanocomposite coatings (NCCs) on top of API X100 carbon steel using several concentrations of TiNi nanoparticles (0.2, 0.4 and 0.8 g L-1 in the bath) is successfully achieved. The influence of the TiNi nanoparticles on the composition, deposition rate, thickness, and morphology of the NiP coating are investigated before and after annealing at 400 oC. The addition of TiNi nanoparticles into the NiP matrix led to the transform of the amorphous structure of the as-plated NiP into a semi-crystalline one. The microhardness of the composite coating significantly enhances with increasing TiNi concentration up to 0.4 g L-1 and further improvement takes place after heat treatment. The electrochemical impedance spectroscopy (EIS) and the colony counting method are carried out to assess the corrosion protection and antibacterial properties, respectively, of the as-deposited and the annealed coatings. The results demonstrate that there is an optimum concentration for the addition of TiNi (0.4 g L-1), which offers the composite coating with the highest corrosion protection that reaches to about 98 %. Below and beyond this concentration as well as after heat treatment, the improvement in the corrosion protection of the composite coatings slightly decreases. Besides, the NiP–TiNi NCCs have effective antibacterial properties as it decreased the cell viability of Escherichia coli from 100 to 19%.
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Zhang, Xiuping, Lei Li, Yaozhao Mu, Yanxiang Xie, Jun Dai, and Jing Shi. "Enhancing Conductivity and Corrosion Resistance by Organic Coatings on AZ31 Magnesium Alloy Treated by Micro-Arc Oxidation." In ASME 2019 14th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/msec2019-2894.
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Abstract In this study, an organic coating, in combination of a micro-arc oxidation ceramic layer, was prepared on the surface of a magnesium alloy (AZ31) to achieve both functions of corrosion resistance and electrical conductivity. By using carbon black as conductive particles and epoxy resin as matrix, organic coatings of various weight fractions were applied on the AZ31 surface treated by micro-arc oxidation through adjusting the contents of the conductive particles and non-conductive matrix. Electrical conductivity and corrosion resistance of organic coatings were measured. The results show that the organic coatings can improve the electrical conductivity of the AZ31 material treated by micro-arc oxidation, and the conductivity changes with the ratio between the carbon black particles and non-conductive matrix. The smallest resistance value of the organic coatings reached 130Ω. Also, the organic coating can further improve the corrosion resistance of the AZ31 material. The electrochemical corrosion tests show that the corrosion potential of the AZ31 material with composite coatings was at least 0.6V higher than that of AZ31 only with micro-arc oxidation treatment.
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Degtyar, L. A., I. N. Tyaglivaya, K. V. Ovchinnikova, A. A. Kuts, and F. V. Popov. "ULTRA-DISPERSED ADDITIVES IN THE NICKEL COLLOID-ELECTROLYTE BATHS." In STATE AND DEVELOPMENT PROSPECTS OF AGRIBUSINESS. DSTU-PRINT, 2020. http://dx.doi.org/10.23947/interagro.2020.1.97-101.
Full textAbstract:
The article presents the results of investigates of the effect of ultrafine additives - zirconium diboride, silicon carbide, diamond on the physic-mechanical properties of composite electrochemical nickel coatings obtained from colloid-electrolyte baths. It is shown that precipitation containing ultrafine diamond possess optimal values of microhardness, wear resistance and internal stresses. These coatings can be used as an alternative to chrome coatings on parts of agricultural machinery.
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Fayyaz, Osama, R. A. Shakoor, Anwarul Hasan, M. F. Montemor, Wei Gao, Shahid Rasul, Kashif Khan, and Mohammad Rashed Iqbal Faruque. "Ni-P-ZrC Nanocomposite Coating with Enhanced Corrosion Resistance and Mechanical Properties." In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2021. http://dx.doi.org/10.29117/quarfe.2021.0058.
Full textAbstract:
Corrosion is considered to be greatest challenge for many industries. Nickel-based metallic coatings are emerging as one of the most suitable solution considering various aspects of operating conditions. The current investigation reports the enhancement in mechanical, wear, erosion and corrosion resistance properties of the as-electrodeposited Ni-P-ZrC nanocomposite coatings. For a reasonable examination, Ni-P and Ni-P-ZrC nanocomposite coatings containing 0.75 g/L zirconium carbide nanoparticle (ZCNPs) were synthesized through the modified Watts bath. The integrated coatings were completely explored utilizing different methods specifically field emission scanning electron microscopy (FE-SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XDR), Atomic Force Microscopy (AFM), microhardness, nanoindentation, and electrochemical impedance spectroscopy (EIS). Effective co-electrodeposition of ZCNPs in the Ni-P matrix was accomplished with no detectable imperfections. It was observed that embedment of ZCNPs extensively affects mechanical, and anti-corrosive nature of the Ni-P matrix. Improvement in the mechanical properties can be assimilated to dispersion hardening of ZCNPs within the Ni-P matrix. The wear and erosion results also revealed the improvement in coatings due to the formation of composite structure with Ni-P as matrix and ZCNPs as reinforcement. Moreover, the corrosion protection efficiency (PE%) of the Ni-P coating was improved by the incorporation of ZCNPs from 71 to 85.4%. The Ni-P-ZrC nanocomposite coatings provides a competitive choice for their application in the automobile, electronic, aviation, oil, and gas industry.
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KAN, Hong-min, Xiao-jun FENG, Yuan-yuan WU, Ping-ping TIAN, and Ning ZHANG. "Electrochemical Deposition of Metal-ceramic Composite Coating." In International Conference on Advanced Material Science and Engineeering (AMSE2016). WORLD SCIENTIFIC, 2016. http://dx.doi.org/10.1142/9789813141612_0062.
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