Готові списки джерел за темами / Alkaline corrosion

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Добірка наукової літератури з теми "Alkaline corrosion"

Автор: Grafiati
Опубліковано: 30 травня 2022
Оновлено: 31 травня 2022

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Статті в журналах з теми "Alkaline corrosion"

1

Zhang, Jifu, Chunming Deng, Jinbing Song, Changguang Deng, Min Liu, and Mingjiang Dai. "Electrochemical Corrosive Behaviors of Fe-Based Amorphous/ Nanocrystalline Coating on Stainless Steel Prepared by HVOF-Sprayed." Coatings 9, no. 4 (March 29, 2019): 226. http://dx.doi.org/10.3390/coatings9040226.

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In this study, FeCrMnWMoSi amorphous/nanocrystalline coating was prepared on stainless steel by high-velocity oxygen fuel (HVOF) spraying. In order to thoroughly evaluate this novel material, the corrosion behaviors and corrosive film characteristics of the amorphous/nanocrystalline coating in NaCl corrosive media were studied using electrochemical measurement technologies such as potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS). It was found that the corrosion resistance of Fe-based amorphous/nanocrystalline coating could be attributed to the passive film formed, which consisted of Fe, Cr, Mo, and W oxides. pH has an important influence on the corrosion resistance of amorphous/nanocrystalline coating by changing the pitting corrosion mechanism. Under neutral and acidic conditions, the corrosion mechanism of Fe-based amorphous/nanocrystalline coating was mainly local pitting corrosion. However, under strong alkaline conditions, the amorphous/nanocrystalline coating not only had pitting corrosion, but also had the active dissolution of the passive film. Therefore, the anti-corrosion performance of Fe-based amorphous/nanocrystalline coating under alkaline conditions was not as good as neutral and acidic corrosive medium.
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2

Francis, Roger, and Steve Clarke. "Corrosion in Caustic Soda in Mineral Processing Operations." Corrosion 76, no. 7 (May 9, 2020): 707–15. http://dx.doi.org/10.5006/3520.

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Because of the high cost of energy, hydrometallurgy is frequently preferred to smelting to extract metals from ores. Many of these processes involve leaching of the metal with an acid, often sulfuric acid. However, there are some processes that use alkaline leachates, such as sodium hydroxide. Hot alkaline solutions present somewhat different corrosion problems to acidic ones and this paper presents data on the corrosion performance of metals and polymers in hot alkaline solutions. Some case histories from the mineral processing industry are used to demonstrate the importance of correct material selection in these corrosive solutions.
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Tu, Xiaohui, Jun Quan Liu, Wei Li, and Jun Yi Su. "Corrosion Behavior of Chromium Cast Iron and Steel in Hot Concentrated Alkaline." Materials Science Forum 510-511 (March 2006): 174–77. http://dx.doi.org/10.4028/www.scientific.net/msf.510-511.174.

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Abstract. Hot concentrated alkaline corrosion and wearing corrosion environment exists in alumina metallurgical industry. Iron and steel materials with outstanding alkaline corrosion resistance are strongly demanded for their fabrication equipments. In this paper, corrosion resistance in static hot concentrated alkaline solution of several kinds of martensite chromium cast iron and steel was studied through polarization curves, potential-time curves, weight loss in the corrosion, and corrosive morphology analysis. Experimental results indicated that corrosion processes can be divided into three stages: dissolving of passivating films, exposed surface corrosion, and corrosion beneath the corroded product. Protection effect of the passivating films was transitory, and the corrosion rate during the exposed surface corrosion reached the maximum. Corrosion of the testing materials was composed of active dissolving corrosion of the metal matrix and caustic embrittlement cracking of the matrix, as well as grain boundary corrosion for the cast iron. Dissolving corrosion of the metal matrix was the main cause that induced the weight loss, while severe caustic embrittlement cracking of the metal matrix was disadvantageous. With an increase of the chromium content in the cast iron or steel, active dissolving corrosion of the metal matrix increased. However, the tendency of caustic embrittlement cracking decreased.
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4

Kamdi, Zakiah, C. Y. Phang, and H. Ahmad. "Corrosion Behavior of WC-Co Cermet Coatings." Materials Science Forum 819 (June 2015): 87–90. http://dx.doi.org/10.4028/www.scientific.net/msf.819.87.

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Metal-ceramic composite or cermet coatings have become popular due to their enhanced wear and corrosion resistance properties. Cermet consists of ceramic particulate embedded in a metallic binder. WC-Co coatings are often used in applications that require wear resistance, but there are many applications in which thermally sprayed coatings have been deposited on components that operate under both abrasive and corrosive condition. Thus, in this study, the corrosion behavior of WC-12wt%Co in different electrolyte has been evaluated. Electrochemical test has been done in three electrolytes namely 0.5 M hydrochloric acid, HCl, 0.5 M sulfuric acid, H2SO4 and 0.5 M sodium hydroxide, NaOH. It is found that corrosion potential of this coating in acidic environment is more positive compares to in alkaline environment. Both in acid and alkaline electrolyte, binder dissolution were preferential. It may be concluded that this coating have higher corrosion resistance in alkaline electrolyte than in acid electrolyte.
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Maizelis, Antonina, and Boris Bairachniy. "Corrosion-Electrochemical Behaviour of Low-Alloy Steel in Alkaline Media." Chemistry & Chemical Technology 12, no. 2 (June 25, 2018): 258–62. http://dx.doi.org/10.23939/chcht12.02.258.

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Serebrennikova, I., I. Paramasivam, P. Roy, W. Wei, S. Virtanen, and P. Schmuki. "Steel corrosion in alkaline batteries." Electrochimica Acta 54, no. 22 (September 2009): 5216–22. http://dx.doi.org/10.1016/j.electacta.2009.02.022.

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Grischenko, L. S., N. P. Ivanova, V. G. Matys, and V. A. Ashuyko. "Corrosion resistance of hot-dip galvanized steel in chloride-containing medium." Proceedings of the National Academy of Sciences of Belarus, Chemical Series 54, no. 4 (January 12, 2019): 419–27. http://dx.doi.org/10.29235/1561-8331-2018-54-4-419-427.

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Today, corrosion and corrosion protection of metals are the most important scientific, technical, economic and environmental problems. The effect of additions of sodium molybdate, ammonium metavanadate, a mixture of sodium molybdate and ammonium metavanadate, thiourea and sodium orthophosphate on the corrosive behavior of hot-dip galvanized steel in a neutral and slightly alkaline chloride-containing medium has been studied. The experimental results obtained by weight and electrochemical methods proved sodium molybdate, ammonium metavanadate, a mixture of sodium molybdate and ammonium metavanadate, thiourea and sodium orthophosphate to be corrosion inhibitors that slow down the rate of destruction of hot-dip galvanized steel in a neutral and slightly alkaline chloride-containing medium by 1.5–11 times.
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Huang, Long, Shan Shan Luo, and Wen Kui Li. "Corrosion Behavior of Al2O3 Ceramics in the Acid and Alkaline Solutions." Key Engineering Materials 512-515 (June 2012): 509–12. http://dx.doi.org/10.4028/www.scientific.net/kem.512-515.509.

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Al2O3 materials were used in a very wide range due to its good mechanical properties and relative low manufacture cost. The corrosion resistance of Al2O3 materials in acid, alkaline and sea water solutions gained more and more attention because many application situations are severe and the working life is shorten due to the corrosion. In this paper, the corrosion behavior of Al2O3 based materials in acid and alkaline solutions was studied and effect of corrosion time on the corrosion behavior of Al2O3 materials was investigated. The microstructure of as prepared Al2O3 materials was characterized by SEM. Possible corrosion process and mechanism was discussed in details. The results reveal that the as prepared Al2O3 materials show better corrosion resistance in alkaline solution than in acid solutions. In both acid and alkaline conditions, the corrosion mainly occurs in the grain boundary. Mass loss increased with increasing corrosion time, while the corrosion rate was decreased.
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Wang, Tianyu, Yahong Zhao, Baosong Ma, and Cong Zeng. "Durability Study on High-Performance Fiber-Reinforced Mortar under Simulated Wastewater Pipeline Environment." Materials 14, no. 14 (July 6, 2021): 3781. http://dx.doi.org/10.3390/ma14143781.

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The acid–alkaline-inducd corrosive environments inside wastewater concrete pipelines cause concrete structural deterioration and substantial economic losses all over the world. High-performance concrete/mortar (HPC) was designed to have better resistance to corrosive environments, with enhanced service life. However, the durability of HPC in wastewater pipeline environments has rarely been studied. A high-performance mortar mixture (M) reinforced by supplemental materials (including fly ash and silica fume) and polyvinyl alcohol (PVA) fibers, together with a mortar mixture (P) consisting of cement, sand and water with similar mechanical performance, were both designed and exposed to simulated wastewater pipeline environments. The visual appearance, dimensional variation, mass loss, mechanical properties, permeable pore volume, and microstructure of the specimens were measured during the corrosion cycles. More severe deterioration was observed when the alkaline environment was introduced into the corrosion cycles. Test results showed that the M specimens had less permeable pore volume, better dimensional stability, and denser microstructure than the P specimens under acid–alkaline-induced corrosive environments. The mass-loss rates of the M specimens were 66.1–77.2% of the P specimens after 12 corrosion cycles. The compressive strength of the M specimens was 25.5–37.3% higher than the P specimens after 12 cycles under corrosive environments. Hence, the high-performance mortar examined in this study was considered superior to traditional cementitious materials for wastewater pipeline construction and rehabilitation.
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Li, Yan, Yasheng Luo, Songtao Hu, Jianglin Gao, and Chaojie Wang. "Effect of Alkali Seepage Erosion on Physical and Mechanical Properties of Laterite." Advances in Materials Science and Engineering 2021 (October 1, 2021): 1–10. http://dx.doi.org/10.1155/2021/8002984.

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Using a modified permeameter, laterite samples that were corroded and permeated by alkaline solutions at different concentrations for varying amounts of time were subjected to triaxial compression tests, chemical composition analysis, particle composition tests, and microstructure analysis. The results showed that the strength parameters c, φ, and K of the laterite samples that were corroded by alkaline-solution permeation were reduced with increasing corrosion time and alkaline-solution concentration. The alkaline-solution corrosion had a minor effect on the strength parameters n and Rf. The contents of Al2O3 and Fe2O3 in the laterite fluctuated and decreased with increasing alkaline-solution concentration and corrosion time. There were no distinct patterns in the relationships between the SiO2 content and the increases in the alkaline-solution concentration and corrosion time. Due to the corrosion during the alkaline-solution permeation, the content of clay particles increased with increasing time and concentration of the alkaline solution. After the permeation with the alkaline solution, the soil particles became smaller and were arranged in an ordered state. The analysis suggested that the permeation effect of the alkaline solution changed the chemical composition of the laterite and the connecting strength of the soil particles, resulting in changes in its physical and mechanical properties.
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Дисертації з теми "Alkaline corrosion"

1

Been, Jantje. "Titanium corrosion in alkaline hydrogen peroxide environments." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0001/NQ34511.pdf.

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zhang, peilun. "Zn Corrosion in Alkaline Aqueous Electrolytes: Effect of Electrolyte Composition on Corrosion Rate and Inhibitors to Suppress Corrosion." Case Western Reserve University School of Graduate Studies / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=case1618400150411797.

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3

Doja, Somi. "Corrosion behaviour of AZ31 magnesium alloy in highly alkaline environments." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/61481.

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Magnesium (Mg) and its alloys are known for their high chemical reactivity. This property often poses issues related to undesirable corrosion, or degradation of exposed surfaces. The chemical reactivity of Mg can be also exploited, and as a result Mg alloys often find use as anode materials for fuel cells. However, due to a long term immersion of the anodes in highly alkaline environments, the problem of corrosion remains and needs to be evaluated. Therefore, in this research, the corrosion behavior of a commercially available magnesium alloy AZ31 in 45 wt% potassium hydroxide (KOH), a common electrolyte for alkaline fuel cells, was studied. Immersion tests were performed for a total duration of 20 days to study the growth of corrosion products on the alloy’s surface. Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and X-ray Diffraction (XRD) were carried out to characterize the structure and chemistry of the corrosion products. Also, electrochemical studies were carried out to study the kinetics of corrosion of the AZ31 alloy. Finally, the effect of adding 2 wt% sodium silicate (Na₂SiO₃) to the KOH electrolyte in order to manipulate the corrosion rate was also examined. Tafel analysis confirmed that the corrosion potential of the AZ31 sample immersed in the Na₂SiO₃ + KOH solution reduced by 16% with respect to that of sample immersed in pure KOH. Although the AZ31 alloy contains only a trace amount of nickel, SEM-EDS characterization of the corrosion products revealed that they contained high levels of nickel, with XRD analysis confirming the presence of a nickel hydroxide layer. In the case of the sample immersed in Na₂SiO₃ + KOH electrolyte, an additional layer rich in silicates developed, and likely acted as a barrier for diffusion of ions from surface of the AZ31 sample to the electrolyte. EIS results of modeling the surface corrosion phenomena revealed that a modified Randle’s circuit represented the electrochemical processes occurring on the surface of the alloy. Warburg impedance for the sample immersed in Na₂SiO₃ + KOH was relatively high, suggesting a dissolution of ions from the surface into the highly alkaline KOH electrolyte.
Graduate Studies, College of (Okanagan)
Graduate
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4

Conrad, Heidi A. Golden Teresa Diane. "Electrochemical deposition of zinc-nickel alloys in alkaline solution for increased corrosion resistance." [Denton, Tex.] : University of North Texas, 2009. http://digital.library.unt.edu/ark:/67531/metadc12101.

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Zhou, Ting. "Electrodeposition of Molybdenum-Based Coatings from Aqueous Alkaline Solutions for Enhanced Corrosion Resistance." Thesis, University of North Texas, 2018. https://digital.library.unt.edu/ark:/67531/metadc1157641/.

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Zn-Mo coatings are very promising environment friendly anticorrosive coatings as replacement materials for cadmium and chromium (VI) based conversion layers. Electrodeposition has become a favorable technique in fabricating coatings due to its low cost, ease of use, and overall experimental control of coating quality. Very little research so far has been done for the electrodeposition of Zn-Mo coatings under alkaline conditions. In this work, Zn and Zn-Mo coatings were electrochemically deposited on stainless steel from an aqueous alkaline citrate solution. An organic compound, vanillin, was added to the electrolyte as a leveling agent for improving interlayer adherence and corrosion resistance of Zn-Mo coatings. Ni-Mo alloys have been known to possess high tensile strength and excellent corrosion protection of steels, and MoTe2 layers have a potential for the application in anticorrosive coatings due to their hydrophobic properties. In this study, MoTe2-Ni-Mo coatings were deposited on stainless steel using both sputtering and electrodeposition methods. These coatings with high corrosion resistance and other desirable properties are in demand in the oil and gas industry since they can protect and thus extend the lifetime of the underlying materials when exposed to aggressive environments. The Zn-Mo and MoTe2-Ni-Mo coatings were evaluated for chemical composition and corrosion behavior using different types of instrumental and electrochemical techniques. The addition of vanillin to the electrolyte did not change the crystalline structure or composition of the Zn-Mo coating, however, the corrosion resistance of the coating was significantly improved by the leveling effect of vanillin during the electrodeposition. The corrosion resistance of the Ni-Mo coating was also enhanced by applying the hydrophobic MoTe2 monolayer on the top surface.
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Conrad, Heidi A. "Electrochemical Deposition of Zinc-Nickel Alloys in Alkaline Solution for Increased Corrosion Resistance." Thesis, University of North Texas, 2009. https://digital.library.unt.edu/ark:/67531/metadc12101/.

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The optimal conditions for deposition of zinc-nickel alloys onto stainless steel discs in alkaline solutions have been examined. In the past cadmium has been used because it shows good corrosion protection, but other methods are being examined due to the high toxicity and environmental threats posed by its use. Zinc has been found to provide good corrosion resistance, but the corrosion resistance is greatly increased when alloyed with nickel. The concentration of nickel in the deposit has long been a debated issue, but for basic solutions a nickel concentration of 8-15% appears optimal. However, deposition of zinc-nickel alloys from acidic solutions has average nickel concentrations of 12-15%. Alkaline conditions give a more uniform deposition layer, or better metal distribution, thereby a better corrosion resistance. Although TEA (triethanolamine) is most commonly used to complex the metals in solution, in this work I examined TEA along with other complexing agents. Although alkaline solutions have been examined, most research has been done in pH ≥ 12 solutions. However, there has been some work performed in the pH 9.3-9.5 range. This work examines different ligands in a pH 9.3-9.4 range. Direct potential plating and pulse potential plating methods are examined for optimal platings. The deposits were examined and characterized by XRD.
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Chasse, Kevin Robert. "A study on the mechanism of stress corrosion cracking of duplex stainless steel in hot alkaline-sulfide solution." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/42793.

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Corrosion and stress corrosion cracking of structural components cost an estimated $300 billion annually in the United States alone and are a safety concern for a number of industries using hot alkaline environments. These process environments may contain different amounts of sulfide and chloride; however, the combined role of these ions on the stress corrosion cracking of duplex stainless steels, which are widely used because of their generally reliable performance, had never been studied. This study shows that chlorides in sulfide-containing caustic environments actually have a significant influence on the performance of these alloys. A mechanism for stress corrosion cracking of duplex stainless steels in hot alkaline environments in the presence of sulfide and/or chloride was proposed. Microstructural and environmental aspects were studied using mechanical, electrochemical, and film characterization techniques. The results showed that selective corrosion of the austenite phase depended on percent sulfidity, alkalinity, and chloride content. Chlorides enhanced crack initiation and coalescence along the austenite/ferrite phase boundaries. Unstable passivity of duplex stainless steels in hot alkaline-sulfide environments was due to anion adsorption on the surface leading to defective film formation. Chlorides and sulfide available at the electrolyte/film surface reduced the charge transfer resistance and shifted the response of the films to lower frequencies indicating the films became more defective. The surface films consisted of an outer, discontinuous layer, and an inner, barrier layer. Fe, Mo, and Mn were selectively dissolved in alkaline and alkaline-sulfide environments. The onset of stress corrosion cracking was related to the extent of selective dissolution and was consistent with a film breakdown and repair mechanism similar to slip-step dissolution. Recommendations for reducing the susceptibility of duplex stainless steels to stress corrosion cracking in sulfide-containing caustic environments include reducing the chloride to hydroxide ratio and alloying with less Mo and Mn. The results will impact the petrochemical, pulp and paper, and other process industries as new duplex grades can be developed with optimal compositions and environments can be controlled to extend equipment life.
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Cai, Jiaying, and D. F. Gervasio. "The Nature of Surface Oxides on Corrosion-Resistant Nickel Alloy Covered by Alkaline Water." SpringerOpen, 2010. http://hdl.handle.net/10150/610223.

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A nickel alloy with high chrome and molybdenum content was found to form a highly resistive and passive oxide layer. The donor density and mobility of ions in the oxide layer has been determined as a function of the electrical potential when alkaline water layers are on the alloy surface in order to account for the relative inertness of the nickel alloy in corrosive environments.
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9

Abosrra, L. R. "Corrosion of steel reinforcement in concrete : corrosion of mild steel bars in concrete and its effect on steel-concrete bond strength." Thesis, University of Bradford, 2010. http://hdl.handle.net/10454/5417.

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This thesis reports on the research outcome of corrosion mechanism and corrosion rate of mild steel in different environments (saline, alkaline solutions and concrete media) using potentiodynamic polarization technique. The study also included the effect of corrosion on bond strength between reinforcing steel and concrete using pull-out test. Corrosion of mild steel and 316L stainless steel with different surface conditions in 1, 3 and 5% saline (NaCl + Distilled water) was investigated. Specimens ground with 200 and 600 grit silicon carbide grinding paper as well as 1μm surface finish (polished with 1μm diamond paste) were tested. In case of mild steel specimens, reduction in surface roughness caused increase in corrosion rate, while in 316L stainless steel corrosion rate decreased as the surface roughness improved. Metallographic examination of corroded specimens confirmed breakdown of passive region due to pitting corrosion. Corrosion of mild steel was also investigated in alkaline solution (saturated calcium hydroxide, pH =12.5) contaminated with 1, 3 and 5% saline. A series of corrosion experiments were also conducted to examine the efficiency of various concentrations of calcium nitrite (CN) on corrosion behaviour of both as-received and polished mild steel in alkaline solution containing 3% saline after 1 hour and 28 days of exposure. Corrosion rate was higher for the as-received than polished mild steel surface under the same testing conditions in NaCl alkaline solution with and without nitrites due to the effect of surface roughness. Morphology investigation of mild steel specimens in alkaline solution ii containing chlorides and nitrites showed localized pits even at nitrite concentration equal to chloride concentration. Corrosion of steel bars embedded in concrete having compressive strengths of 20, 30 and 46MPa was also investigated. The effect of 2 and 4% CN by weight of cement on corrosion behaviour of steel bar in low and high concrete strengths specimens were also studied. All reinforced concrete specimens were immersed in 3% saline solution for three different periods of 1, 7 and 15 days. In order to accelerate the chemical reactions, an external current of 0.4A was applied. Corrosion rate was measured by retrieving electrochemical information from polarization tests. Pull-out tests of reinforced concrete specimens were then conducted to assess the corroded steel/concrete bond characteristics. Experimental results showed that corrosion rate of steel bars and bond strength were dependent on concrete strength, amount of CN and acceleration corrosion period. As concrete strength increased from 20 to 46MPa, corrosion rate of embedded steel decreased. First day of corrosion acceleration showed a slight increase in steel/concrete bond strength, whereas severe corrosion due to 7 and 15 days corrosion acceleration significantly reduced steel/concrete bond strength. Addition of only 2% CN did not give corrosion protection for steel reinforcement in concrete with 20MPa strength at long time of exposure. However, the combination of good quality concrete and addition of CN appear to be a desirable approach to reduce the effect of chloride induced corrosion of steel reinforcement. At less time of exposure, specimens without CN showed higher bond strength in both concrete mixes than those with CN. After 7 days of corrosion acceleration, the higher concentration of CN gave higher bond strength in both concrete mixes. The same trend was observed at 15 days of corrosion acceleration except for the specimen with 20MPa compressive strength and 2% CN which recorded the highest deterioration in bond strength.
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Pismenny, Arthur. "Stray current corrosion of carbon steel, electroplated nickel, and electroless nickel in an alkaline environment." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ63142.pdf.

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Книги з теми "Alkaline corrosion"

1

Pismenny, Arthur. Stray current corrosion of carbon steel, electroplated nickel, and electroless nickel in an alkaline environment. Ottawa: National Library of Canada, 2001.

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2

Nieto-Rodriguez, Alberto. Study of the corrosion of carbon and its impurities in PTFE-bonded alkaline fuel cell electrodes. Ottawa: National Library of Canada, 1996.

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3

Gibb, G. C. Alkali metal phophates as corrosion inhibitors for aluminium. Manchester: UMIST, 1993.

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4

Poulsen, Ervin. 13 betonsygdomme: Hvordan de opstår, forløber og forebygges. Hørsholm: ATV-udvalget vedrørende betonbygværkers holdbarhed, Statens byggeforskningsinstitut, 1985.

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5

Evaluation of alkaline cleaner materials. [Washington, DC: National Aeronautics and Space Administration, 1998.

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6

Behrens, Dieter. Corrosive Agents & Their Interaction With Materials: Aliphatic Amines, Alkaline Earth Chlorides, Alkaline Earth Hydroxides, Fluorine, Hydrogen Fluoride ... Acid (The Dechema Corrosion Handbook). Wiley-VCH Verlag GmbH, 1999.

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Частини книг з теми "Alkaline corrosion"

1

Dreyfuss, P., R. D. Vargo, R. S. Miller, and R. Bright. "Rubber Coatings for Fiberglass Protection in an Alkaline Environment." In Polymeric Materials for Corrosion Control, 349–59. Washington, DC: American Chemical Society, 1986. http://dx.doi.org/10.1021/bk-1986-0322.ch031.

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2

Hojo, H., T. Tsuda, K. Ogasawara, and T. Takizawa. "Corrosion Behavior of Epoxy and Unsaturated Polyester Resins in Alkaline Solution." In Polymeric Materials for Corrosion Control, 314–26. Washington, DC: American Chemical Society, 1986. http://dx.doi.org/10.1021/bk-1986-0322.ch028.

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3

de Bouvier, O., B. Prieux, F. Vaillant, M. Bouchacourt, and P. Lemaire. "Nickel Alloy Stress Corrosion Cracking in Neutral and Lightly Alkaline Sulfate Environments." In Ninth International Symposium on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors, 695–701. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118787618.ch72.

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Tu, Xiaohui, Jun Quan Liu, Wei Li, and Jun Yi Su. "Corrosion Behavior of Chromium Cast Iron and Steel in Hot Concentrated Alkaline." In Materials Science Forum, 174–77. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-995-4.174.

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Colomban, Philippe, Gwénaël Gouadec, and Léo Mazerolles. "Alkaline Corrosion of SiC and Carbon Fibers Surface - A Raman and Electron Microscopy Study." In Ceramic Transactions Series, 157–68. 735 Ceramic Place, Westerville, Ohio 43081: The American Ceramic Society, 2012. http://dx.doi.org/10.1002/9781118380925.ch12.

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Liang, Shu Quan, Yong Zhang, Yan Tang, Shao Qiang Li, and Xiao Ping Tan. "Corrosion Behavior Improvements of High Active Aluminum Alloy Anode in Alkaline Solution by Adding Inhibitors." In Materials Science Forum, 1153–58. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-432-4.1153.

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Colomban, Ph, A. Attar, G. Gouadec, and N. P. Bansal. "Confocal Raman Imaging of (Uncoated/Coated) HPZ Fibers Reinforcing Celsian Matrix Composites, Before and After Alkaline Corrosion." In Ceramic Transactions Series, 203–15. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118380826.ch18.

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O’Brien, Thomas F., Tilak V. Bommaraju, and Fumio Hine. "Corrosion." In Handbook of Chlor-Alkali Technology, 1295–348. Boston, MA: Springer US, 2005. http://dx.doi.org/10.1007/0-306-48624-5_14.

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Santos, H. O., Clarice Terui Kunioshi, J. L. Rossi, and Isolda Costa. "The Corrosion Behaviour of a Hypereutectic Al-Si Alloy Obtained by Spray Forming in Acid, Neutral and Alkaline Solutions." In Materials Science Forum, 126–31. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-423-5.126.

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Mani, Sathishraj, and Bulu Pradhan. "Effect of Alkaline Solution Content on Strength and Chloride Induced Corrosion of Steel in Geopolymer Concrete Made from Fly Ash." In Lecture Notes in Civil Engineering, 123–37. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-26365-2_12.

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Тези доповідей конференцій з теми "Alkaline corrosion"

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Xu, Jin-Sha, Chen-Huai Tang, Yi Chen, Fa-Cai Ren, Jun Si, Ju Ding, Pu-Gen Zhang, Yu-Qing Yang, Yan-Nan Du, and Shou-Peng Han. "Effect of Glaze Composition on the Corrosion Resistance of Glass Lining of Glass-Lined Pressure Vessels." In ASME 2020 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/pvp2020-21153.

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Анотація:
Abstract Glass-lined pressure vessels are widely used in various corrosion conditions because of their excellent corrosion resistance. Under the same firing process condition, the corrosion-resistant properties of glass-lined vessels are largely dependent upon the glaze composition. In this paper, three kinds of glazes were selected to study the corrosion resistance to acid and alkali of the glass lining. Based on the glaze composition analysis, the corrosion quantity and the micromorphology observations of the corroded surfaces, the effect of glaze composition on the corrosion resistance to acid and alkali of glass lining was discussed. The results showed that the corrosion resistance of glass lining was mainly to the content of SiO2 and the continuity level of [SiO4] skeleton in glass network structure. The higher continuity level of [SiO4] skeleton led to the better physicochemical properties of the glass lining. The addition of the acid resistant oxide TiO2 improved the acid resistance of glass lining. The proper addition of ZrO2 improved the corrosion resistance to acid and alkali. There were two reasons, one of which was that the joining of Zr4+ into the glass network improved the structural integrity, and the other was that the reaction of Zr4+ with OH− produced Zr(OH)4 on the glass lining occurred and formed a shielding lining against alkali when glass lining was in the alkaline condition.
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2

Wong, Lana L., John C. Estill, David V. Fix, and Rau´l B. Rebak. "Corrosion Characteristics of Titanium Alloys in Multi-Ionic Environments." In ASME 2003 Pressure Vessels and Piping Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/pvp2003-2141.

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Yucca Mountain (Nevada) is designated as a high-level nuclear waste repository. The nuclear waste will be isolated by a series of engineered barriers. The metallic engineered barriers will consist of a double-wall container with a detached drip shield. The material for the external wall of the container is Alloy 22, a corrosion-resistant Ni-Cr-Mo alloy. Titanium grade 7 has been proposed for the drip shield. Ti alloys are highly resistant to all forms of corrosion due to the formation of a stable, protective and strongly adherent oxide film. The aim of this research was to characterize the general and localized corrosion behavior of Ti Gr 7, 16 and 12 in simulated concentrated ground waters. Welded and non-welded coupons were exposed for up to 5 years to the vapor and liquid phases of acidic and alkaline multi-ionic solutions at 60°C and 90°C. This paper describes the results obtained after approximately 2-1/2- to 5-1/2-year exposure to the testing electrolyte solutions. In general, the highest corrosion rate was obtained for Ti Gr 12; however, in all of the tested conditions, the corrosion rate was generally lower than 100 nm/yr. For all alloys, the highest corrosion rate was obtained in the concentrated alkaline solution.
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Zulkafli, M. Y., N. K. Othman, A. M. Lazim, and A. Jalar. "Inhibitive effects of palm kernel oil on carbon steel corrosion by alkaline solution." In THE 2013 UKM FST POSTGRADUATE COLLOQUIUM: Proceedings of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology 2013 Postgraduate Colloquium. AIP Publishing LLC, 2013. http://dx.doi.org/10.1063/1.4858627.

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Brossard, Jean-Michel, Florimonde Lebel, Christophe Rapin, Jean-Franc¸ois Mareˆche´, Xavier Chaucherie, Franc¸ois Nicol, and Michel Vilasi. "Lab-Scale Study on Fireside Superheaters Corrosion in MSWI Plants." In 17th Annual North American Waste-to-Energy Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/nawtec17-2339.

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Combustion of the municipal waste generates highly corrosive gases (HCl, SO2, NaCl, KCl and heavy metals chlorides) and ashes containing alkaline chlorides and sulphates. Currently, corrosion phenomena are particularly observed on superheater’s tubes. Corrosion rates depend mainly on installation design, operating conditions i.e. gas and steam temperature and velocity of the flue gas containing ashes. This paper presents the results obtained using an innovative laboratory-scale corrosion pilot, which simulates MSWI boilers conditions characterized by a temperature gradient at metal tube on the presence of corrosive gases and ashes. The presented corrosion tests were realized on carbon steel at fixed metal temperature (400°C). The influence of the flue gas temperature, synthetic ashes composition and flue gas flow pattern were investigated. After corrosion test, cross section of tube samples were characterised to evaluate thickness loss and estimate corrosion rate while the elements present in corrosion layers were analysed. Corrosion tests were carried out twice in order to validate the accuracy and reproducibility of results. First results highlight the key role of molten phase related to the ash composition and flue gas temperature as well as the deposit morphology, related to the flue gas flow pattern, on the mechanisms and corrosion rates.
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Turchin, Vadim, Stanislav Sychugov, Ludmila Yudina, Alexander Gumeniuk, Tatyana Zhilkina, Yuriy Gmizov, Rimantas Mackevicius, and Tatyana Ivanova. "Corrosion resistance dry building mortars base on alkaline slag binder for using in aggressive sulfate medium." In The 13th international scientific conference “Modern Building Materials, Structures and Techniques”. Vilnius Gediminas Technical University, 2019. http://dx.doi.org/10.3846/mbmst.2019.039.

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Dry Building Mortars (DBM) are new in terms of building technology, and they sometimes substitute different kinds of concrete and mortar mixes. DBM have been successfully used in construction and their performance has been as efficient as the one of commercial mortar mixes, i.e. they boost labour efficiency, and bring down material consumption. They can be also kept in stock for a long time, and shipped with no compromise in quality. Today DBM are based on cementing components. And some famous mix mortars are based on gypsum, polymer, and some other types of cementing components which contain fine-dispersed additives of ground slag, fly ash, and raw sludge. These mix mortars are applied as smoothing, aligning, waterproof, and safety types of coverage. This article studies the possibility of involving slag cementing components in manufacturing DBM. Due to their high waterproof resistance in salt-affected water, these sorts of mixes may be used as protective coatings and plasters for concrete frames in corrosive medium. Slag Cementing Components (SCC) are hydraulic cementing agents, which harden both in water and in open air. They are produced by mixing electric-furnace slag or furnace clinkers with some solutions of alkaline metals (to trigger alkaline reaction), or by mixing together all these agents.
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Song, Zhiwei, Yonghao Zhao, Guanzhong Wu, and Xuzhou Gao. "Effect of High Pressure Torsion on corrosion behavior of High Entropy Alloy in alkaline solution." In Advances in Materials, Machinery, Electrical Engineering (AMMEE 2017). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/ammee-17.2017.16.

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Koleva, D. A., J. Hu, H. Kolev, and K. Van Breugel. "Self-healing of steel corrosion in a model alkaline medium: electrochemical response and surface analysis." In MATERIALS CHARACTERISATION 2013. Southampton, UK: WIT Press, 2013. http://dx.doi.org/10.2495/mc130181.

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8

Fix, David V., John C. Estill, Lana L. Wong, and Rau´l B. Rebak. "General and Localized Corrosion of Austenitic and Borated Stainless Steels in Simulated Concentrated Ground Waters." In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-2792.

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Boron containing stainless steels are used in the nuclear industry for applications such as spent fuel storage, control rods and shielding. It was of interest to compare the corrosion resistance of three borated stainless steels with standard austenitic alloy materials such as type 304 and 316 stainless steels. Tests were conducted in three simulated concentrated ground waters at 90°C. Results show that the borated stainless were less resistant to corrosion than the witness austenitic materials. An acidic concentrated ground water was more aggressive than an alkaline concentrated ground water.
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Qi, Jiacheng, Guofeng Pan, Chenwei Wang, Chao Huang, and Lianjun Hu. "Effect of Chelating Agent on the Galvanic Corrosion between Copper and Tantalum based Alkaline Polishing Surry." In 2019 China Semiconductor Technology International Conference (CSTIC). IEEE, 2019. http://dx.doi.org/10.1109/cstic.2019.8755808.

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Huang, Chao, Guofeng Pan, Jiacheng Qi, and Chenwei Wang. "Effect of Chelation and Oxidation on Reducing Galvanic Corrosion between Cobalt and Copper in Alkaline Slurry." In 2019 China Semiconductor Technology International Conference (CSTIC). IEEE, 2019. http://dx.doi.org/10.1109/cstic.2019.8755612.

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Звіти організацій з теми "Alkaline corrosion"

1

Moser, Robert, Preet Singh, Lawrence Kahn, Kimberly Kurtis, David González Niño, and Zackery McClelland. Crevice corrosion and environmentally assisted cracking of high-strength duplex stainless steels in simulated concrete pore solutions. Engineer Research and Development Center (U.S.), August 2021. http://dx.doi.org/10.21079/11681/41620.

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This paper presents a study of crevice corrosion and environmentally assisted cracking (EAC) mechanisms in UNS S32205 and S32304 which were cold drawn to tensile strengths of approximately 1300 MPa. The study utilized a combination of electrochemical methods and slow strain rate testing to evaluate EAC susceptibility. UNS S32205 was not susceptible to crevice corrosion in stranded geometries at Cl⁻ concentrations up to 1.0 M in alkaline and carbonated simulated concrete pore solutions. UNS S32304 did exhibit a reduction in corrosion resistance when tested in a stranded geometry. UNS S32205 and S32304 were not susceptible to stress corrosion cracking at Cl⁻ concentrations up to 0.5 M in alkaline and carbonated solutions but were susceptible to hydrogen embrittlement with cathodic overprotection.
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Isaacs, H. S., M. P. Ryan, S. Virtanen, and P. Schmuki. Current distributions and dissolution mechanisms during localized corrosion of steels in alkaline environments. Office of Scientific and Technical Information (OSTI), December 1997. http://dx.doi.org/10.2172/663556.

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Hobbs, D. T. Laboratory Testing of a Raman-Based Measurement System for the Determination of Important Corrosion Species in Alkaline Salt Solutions. Office of Scientific and Technical Information (OSTI), August 2001. http://dx.doi.org/10.2172/784209.

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Pickrell, G. R., T. Sun, and J. J. Brown. High temperature alkali corrosion of ceramics in coal gas. Office of Scientific and Technical Information (OSTI), August 1992. http://dx.doi.org/10.2172/7162665.

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Pickrell, G. R., T. Sun, and J. J. Brown. High temperature alkali corrosion of ceramics in coal gas. Office of Scientific and Technical Information (OSTI), November 1992. http://dx.doi.org/10.2172/6925897.

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Pickrell, G. R., T. Sun, and J. J. Brown. High temperature alkali corrosion of ceramics in coal gas. Office of Scientific and Technical Information (OSTI), November 1991. http://dx.doi.org/10.2172/6114934.

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Pickrell, G. R., T. Sun, and J. J. Brown. High temperature alkali corrosion of ceramics in coal gas. Office of Scientific and Technical Information (OSTI), February 1992. http://dx.doi.org/10.2172/6631793.

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Pickrell, G. R., T. Sun, and J. J. Brown. High temperature alkali corrosion of ceramics in coal gas. Office of Scientific and Technical Information (OSTI), May 1992. http://dx.doi.org/10.2172/5024999.

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Pickrell, G. R., T. Sun, and J. J. Jr Brown. High temperature alkali corrosion of ceramics in coal gas: Final report. Office of Scientific and Technical Information (OSTI), December 1994. http://dx.doi.org/10.2172/61097.

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Bradshaw, Robert w. Corrosion Resistance of Stainless Steels During Thermal Cycling in Alkali Nitrate Molten Salts. Test accounts, September 2001. http://dx.doi.org/10.2172/787885.

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