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Thematische Bibliographien / Korozní ochrana / Dissertationen

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Dissertationen zum Thema „Korozní ochrana“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 1. Februar 2022

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1

Kouba, Jan. „Korozní ochrana slitin hliníku“. Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2012. http://www.nusl.cz/ntk/nusl-216890.

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This diploma thesis deals with cerium-based conversion coatings for aluminium alloys. At first the mechanism of protection of metals by inhibitory substances is described in the theoretical section. The next chapter is devoted to application of lanthanide salts as cathodic corrosion inhibitors. Then the characterization of alloy AA 2024 follows. The main part is dedicated to the growth mechanism of the cerium-based mixed conversion coating on the alloy AA 2024. Finally, the factors affecting the character and the quality of obtained coatings are commented. In the experimental part an influence of the thermal activation together with the activation by a hydrogen peroxide was observed. The created film was characterized using SEM and EDS. The level of corrosion protection was evaluated by the polarization resistance measurement. erized using SEM and EDS. The level of corrosion protection was evaluated by the polarization resistance measurement.

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2

Šomanová, Pavlína. „Příprava a charakterizace vysoce hydrofobních povlaků na hořčíkové slitině AZ91“. Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2021. http://www.nusl.cz/ntk/nusl-444211.

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Magnesium and its alloys have many interesting properties and thanks to them it can be used in many applications (transport industry, medicine etc.). Disadvantage of these materials is their high corrosion rate. For this reason, there is an effort to achieve high corrosion resistance through different modifications of magnesium and its alloys. In recent years the superhydrophobization of the surface seem to be an attractive solution for this question. This type surface modification minimalize contact between the surface and water. In this diploma thesis the superhydrophobic surface was created on the magnesium alloy AZ91. The first step included pretreatment of AZ91 surface by etching in solution of SnCl2 or ZnCl2. Next step was superhydrophobization in the ethanolic solution of stearic acid. The surface morphology and elemental analysis of the superhydrophobic coating were explored by use of scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDS). The adhesion properties of the coating on the AZ91 were analysed by means of scratching test. Contact and sliding angles were measured for superhydrophobic coatings. Electrochemical characterization of the coatings was determined using potentiodynamic polarization (PD) and electrochemical impedance spectroscopy (EIS). Finally, the analysis of composition and the functional groups was made using Fourier-transform infrared spectroscopy (FTIR) and the phase composition analysis was performed using X-ray diffraction (XRD). The results show that the coatings prepared by etching did not lead to good corrosion properties, even though the value of contact angle was about 150 °. The reduction of corrosion resistance could be caused by not obtaining required surface morphology or insufficient binding of stearic acid in the form of stearate to the sample surface.

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3

Matějka, Lukáš. „Protikorozní ochrana hořčíkových slitin ZE10 a ZE41 pomocí fluoridových konverzních povlaků“. Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2018. http://www.nusl.cz/ntk/nusl-376811.

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The diploma thesis deals with preparation of fluoride conversion coatings and evaluation of electrochemical corrosion characteristics of magnesium alloys ZE10 and ZE41 in SBF solution. The main aim of the work is to increase the corrosion resistance of the investigated magnesium alloys using fluoride conversion coatings. The influence of the conditions of the preparation of the conversion coatings on their morphology and the corrosion resistance of the coated alloys will be studied. The electrochemical corrosion characteristics of the magnesium alloys with conversion coatings will be evaluated by potentiodynamic and electrochemical impedance spectroscopy.

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4

Marek, Martin. „Progresivní bednící systém s protikorozní ochrannou funkcí“. Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409764.

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Corrosion of reinforcement in reinforced concrete is a huge problem. Corrosion of reinforcement has a great effect on the service life of reinforced concrete structures. The subject of this work is to verify the inhibitors properties and their efficiency using physical and electrochemical methods. The aim of this work is the design of formwork panels with corrosion protection. The formwork panels are on different material basis. Corrosion protection is ensured by the use of migration corrosion inhibitors.

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5

Vrána, Tomáš. „Návrh sekundárního městského kolektoru s důrazem na ochranu před průnikem podzemní vody“. Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227276.

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In the first part, the master’s thesis deals with the history of utility tunnels, methods of construction processes and materials from which they are built. It also mentions methods and materials which protect against the effects of groundwater. The thesis is mainly dedicated to the design and structural design of the secondary utility tunnel lining with an emphasis on protection against ingress of groundwater. The mathematical model was created in Plaxis 2DAE software.

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6

Taranza, Luboš. „Vývoj nových typů kompozitů pro sanace betonů se zvýšenou ochranou výztuže“. Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-355594.

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Around the world there is a great number of reinforced concrete structures, who´s life cycle, for which they were designed, is significantly shortened due to action of various aggressive environments, or due to defects created during the construction process. (i.e. insufficient steel reinforcement cover depth). One of the most common causes of problems in reinforced concrete structures is corrosion of steel reinforcement. It is necessary to repair structures degraded in this fashion and return them to their original state. We made a unique polymercement concrete repair system was developed with value added. Corrosion inhibitors, including the newly developed, are implemented into its polymercement matrix, which significantly limit the corrosive processes in all new materials. The principle of proposed solution is application of repair system on a corrosion damaged structure, and then the active substances in the repair material will penetrate into substrate concrete and protect corroded steel reinforcement. Another value added is the application of recycled raw materials into the proposed materials, which has indisputable environmental effect and simultaneously allows for improvement of some properties of the repair materials. Further was developed a new method for detecting corrosion inhibitors in concrete.

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7

Chára, Tomáš. „Impregnace korozivzdorných ocelí pro podmínky záoceánských plaveb“. Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2013. http://www.nusl.cz/ntk/nusl-216993.

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This thesis deals with temporary corrosion protection of stainless steel for the conditions of oversea sailing. At first the theoretical part describes types of the stainless steels focusing on their corrosion resistance and negatively or positively impacts affect of their resistance. There is also a proposal of methods of the temporary corrosion protection and testing its effectiveness. The recherché are summarized knowledge in testing resistance of stainless steels to pitting corrosion. The task of the study was to test the effectiveness of three different preservatives and comparing the quality of their temporary corrosion protection compared with unprotected chemically passivated stainless steels.

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8

Tomek, Jan. „Povrchová úprava kontejneru CASTOR“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230829.

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Master’s thesis deals with the problems of the inner surface finish design for the CASTOR container. In the theoretical part are analyzed properties of metallic surfaces with their defects and various options of surface finishes for increased protection. The practical part of the thesis is focused on the design of appropriate technologies for specific requirements of the surface finish for the CASTOR container, creating test samples and their evaluation.

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9

Vlčková, Irena. „Antikorozní úpravy povrch elektromotoru“. Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220288.

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This Master´s thesis is devoted to the basic theory from semester project. There are describe completed practical tests, measurements and results. This project was written below patronage of company Siemens s.r.o. odštěpný závod Elektromotory Mohelnice, which is at the same time also my employer. There is production of asynchronous electromotors frame size 56 to 200. On the all of electromotors is desired quality surface treatment with difference on the base of request of customers.

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10

Sláma, Radek. „Možnosti zvýšení trvanlivosti betonů ve vysoce chemicky agresivním prostředí v zemědělství“. Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409771.

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In recent years there has been a significant increase in the production of concretes for agricultural buildings, especially in the area of exposure to higly chemically aggressive environments. The aim of the thesis is to describe and summarize the existing knowledge about the durability of concrete exposed to the effects of highly chemically agressive environment. Furthermore, emphasis is placed on the description of individual additives and admixtures increasing the resistance of concrete to the effect of harmful substances. In the experimental part, the effects of individual types of additives, admixtures and sealing coatings on increasing the resistance of concrete against the effect of highly chemically aggresive environment are investigated in the laboratory.

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11

Šoch, Zbyněk. „Ochrana svarů proti korozní degradaci“. Master's thesis, 2006. http://www.nusl.cz/ntk/nusl-88539.

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12

Mareček, Tomáš. „Návrh antikorozní ochrany u strojů pro aplikaci hnojiv v zemědělství“. Master's thesis, 2015. http://www.nusl.cz/ntk/nusl-250397.

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The diploma thesis is focused on proposal corrison protection on machines for application of fertilizers in agriculture. The theoretical part describes the distribution of machines for fertilizer application, issue and species of corrosion. The next section discusses the electrochemical corrosion, its principles and distribution. The final section is an experiment that has analyzed the possibility of using five kinds of corrosion protection evaluation of corrosion tests in laboratory.

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13

Dřínková, Hana. „Porovnání nátěrových systémů z hlediska ochranné účinnosti a bezpečnosti“. Master's thesis, 2009. http://www.nusl.cz/ntk/nusl-95829.

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14

Marvánek, Ondřej. „Systémy korozní ochrany svarových spojů konstrukčních materiálů“. Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-150701.

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15

Ráček, Petr. „Korozní odolnost šroubů s povrchovou ochranou“. Master's thesis, 2011. http://www.nusl.cz/ntk/nusl-90457.

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16

Pala, Libor. „Protikorozní ochrana hořčíkových slitin“. Master's thesis, 2019. http://www.nusl.cz/ntk/nusl-427888.

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This thesis is divided into theoretical and experimental part. Corrosion of metals and her distribution are described in theoretical part of this thesis. Detailed description of magnesium, its mechanical properties, methods of production and industrial use follows. Magnesium alloys, influence of alloying elements on their mechanical properties, their classification and industrial use are characterized after that. Methods of corrosion protection of magnesium alloys are defined at the end of theoretical part of this thesis. In the experimental part of this thesis protective anticorrosive coating was applied to tested samples. Two different methods of application were used. Tested samples were subjected to corrosion test in salt chamber. Material weight loss of tested samples was measured. Tensile test of tested samples was performed after that. Influence of anticorrosion coating application on protective properties of tested samples was evaluated in conclusion.

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17

Borek, Jan. „Využití zinku při ochraně proti korozi kovových materiálů“. Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-150553.

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18

Ručka, Josef. „Hodnocení a využití práškových povlaků v ochraně proti korozi“. Master's thesis, 2006. http://www.nusl.cz/ntk/nusl-88162.

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19

Dvořák, Radek. „Využití syntetických jednovrstevných nátěrových hmot v ochraně proti korozi“. Master's thesis, 2008. http://www.nusl.cz/ntk/nusl-95037.

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20

Prnka, Lukáš. „Využití vodouředitelných jednovrstevných nátěrových hmot v ochraně proti korozi“. Master's thesis, 2008. http://www.nusl.cz/ntk/nusl-95291.

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21

Vyškovský, Josef. „Antikorozní ochrana ocelových součástí pomocí kovových povlaků“. Master's thesis, 2019. http://www.nusl.cz/ntk/nusl-427803.

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This work focuses on evaluation of mechanical and anticorrosive properties of zinc coatings. Work as a first characterizes kind of corrosion and possibilities of corrosion protection measures. For the purpose of the experiment, test samples representing a cross-section of current methods of corrosion protection using zinc coatings were prepared. Mechanical properties were evaluated by bend testing and the Erichsen method. Corrosion test specimens were tested in a corrosion chamber. An electron microscope was used for more detailed structural analysis. Electron microscope elemental analysis of selected coatings was also included. Based on the information obtained, it proposes a suitable solution in practice, depending on use of the plated component.

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22

Černý, Oldřich. „Antikorozní ochrana svarů u konstrukčních materiálů“. Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-362261.

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This master´s thesis is divided into two parts - theoretical and practical. The first section of the theoretical part lists welding techniques and mentions the problematic of robot welding. The second section deals with corrosion and types of corrosion degradation. Third and final section discusses the current trends in anticorrosive protection, with special focus on several of them. The practical part applies the theory in from of experiment. Selected anticorrosive protection systems were applied to test samples, which contained a weld. The samples were exposed to accelerated corrosion in salt fog and several other experiments. The samples were then subjected to a tensile test so that the effect of corrosion damage to the weld strength could be measured.

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23

Marcián, Michal. „Změna korozních vlastností ochranných povlaků při mechanickém namáhání“. Master's thesis, 2005. http://www.nusl.cz/ntk/nusl-426115.

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24

Horák, Jiří. „Experimentální hodnocení vzorků povrchové ochrany nádrží na siláž“. Master's thesis, 2009. http://www.nusl.cz/ntk/nusl-95902.

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25

Augustin, Miroslav. „Antikorozní účinnost konzervačních prostředků pro zemědělskou techniku“. Doctoral thesis, 2002. http://www.nusl.cz/ntk/nusl-88135.

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26

Baksa, Zdeněk. „Diference povrchových ochran v oblasti produkce městského mobiliáře“. Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-169429.

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27

Mališ, Radim. „Zhodnocení a návrh povrchové ochrany cisteren pro aplikaci kejdy a průmyslových hnojiv“. Master's thesis, 2006. http://www.nusl.cz/ntk/nusl-87106.

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28

Jurečková, Marie. „Vliv stavu povrchu kovových materiálů na vlastnosti povrchové ochrany nátěrovými hmotami“. Doctoral thesis, 2001. http://www.nusl.cz/ntk/nusl-86711.

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29

Nedbálek, Ivo. „Návrh řešení pracoviště pro protikorozní ochranu podvozků motorových vozidel“. Master's thesis, 2009. http://www.nusl.cz/ntk/nusl-96163.

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30

Marek, Tomáš. „Hodnocení vlastností zinkových protikorozních vrstev“. Master's thesis, 2011. http://www.nusl.cz/ntk/nusl-90235.

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31

Nováčková, Monika. „Ovlivnění adheze u protikorozních organických povlaků“. Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-179310.

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This diploma thesis deals with the adhesion influence of anticorrosion coatings that are applied on the surface of a metallic material. The first part of the work focuses on corrosion, its division and commonly found types. The following part is aimed at protecting against such corrosion damage, including all types of anticorrosion protection. A very important part of this work is surface preparation before application of paints, which is discussed in the third part, where are described the individual methods of preparation. The fourth part deals with the anchorage profile defined and described in detail, and mentioned is also the closely related surface roughness. The subsequent anchorage profile assessment is performed by the comparison method, which consists of roughness sample ranges and follows the part defining the coating compounds, their classification, labelling as well as the colour scheme, up to their properties and methods of application on the material surface. One of the most important parts of the work is the experimental section focused on adhesion testing of the selected coatings in four types of anchorage profile using the pull-off test. The last part is an analysis of the application of knowledge about the coating system adhesion in the field of expert engineering and proficiency.

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