Search results for: PROTECTIVE COATINGS
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Journal of Protective Coatings and Linings
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Protective coatings for stainless steel for SOFC applications
PublicationW pracy przedstawiono badania związane z warstwami antykorozyjnymi stali nierdzewnych stosowanych w tlenkowych ogniwach paliwowych. Warstwy przygotowana z użyciem prekursorów polimerowych na bazie Y i Co. Użyta stal to Crofer 22 APU.
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Antimicrobial properties of protective coatings produced by plasma spraying technique
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Ceria Based Protective Coatings for Steel Interconnects Prepared by Spray Pyrolysis
PublicationStainless steels can be used in solid oxide fuel/electrolysis stacks as interconnects. For successful long term operation they require protective coatings, that lower the corrosion rate and block chemical reactions between the interconnect and adjacent layers of the oxygen or the hydrogen electrode. One of the promising coating materials for the hydrogen side is ceria. Using standard sintering techniques, ceria sinters at around...
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Nanocrystalline diamond sheets as protective coatings for fiber-optic measurement head
PublicationFiber-optic sensors find numerous applications in science and industry, but their full potential is limited because of the risk of damaging the measurement head, in particular, due to the vulnerability of unprotected tips of the fiber to mechanical damage and aggressive chemical agents. In this paper, we report the first use of a new nanocrystalline diamond structure in a fiber-optic measurement head as a protective coating of...
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Degradation of protective coatings in steel chimneys of flue gas desulfurisation system
PublicationThis paper presents problems associated with corrosion of steel stacks and changes in philosophy of corrosion protection when implemented into flue gas desulphurization systems. In-situ tests were taken by means of electrochemical impedance spectroscopy at the stack which discharges flue gas before wet lime/limestone desulphurization. A very quick electrolyte absorption by the spherical infill vinylester coating was found using...
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Use of impedance spectroscopy to evaluate the durability of protective coatings after thermal shock
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Experimental review of the performances of protective coatings for interconnects in solid oxide fuel cells
PublicationFerritic stainless steel interconnects are used in solid oxide fuel cells; however, coatings are required to improve their performance. Although several types of coatings have been proposed, they have been scarcely investigated under similar conditions. This study compares the characteristics of uncoated Crofer 22 APU and eight different coatings on Crofer 22 APU for up to 3000 h at 800 ◦C. The coatings were deposited at various...
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Non-destructive inspection of anti-corrosion protective coatings using optical coherent tomography
PublicationW artykule przedstawiono zastosowanie optycznej tomografii koherentnej (OCT) do badania antykorozyjnych powłok ochronnych. Omówiono właściwości optycznej interferometrii niskokoherentnej jako zastosowanej metody pomiarowej, opisano budowę pomiarowego systemu OCT, zbudowanego w Katedrze Metrologii i Optoelektroniki WETI PG. Przy pomocy zrealizowanego systemu przebadano grupę powierzchni metalicznych pokrytych różnymi powłokami antykorozyjnymi....
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Protective properties of the chromium - titanium carbonitryde composite coatings.
PublicationZbadano właściwości ochronne warstw chromowych zawierających dodatki węglika tytanu poprawiającego właściwości mechaniczne warstw. badania ditycżą roztworów kwasu siarkowego. Badania przeprpwadzono metodą spektroskopii impedamncyjnej. Wykazano ze właściwosci ochronne warswt są lepsze dzięki sdyspergowanym cząstkowm węglika tytanu.
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Recent advances on spinel-based protective coatings for solid oxide cell metallic interconnects produced by electrophoretic deposition
PublicationThe application of ceramic protective coatings to the metallic interconnects in solid oxide cells (SOCs) is a viable and effective method to limit interconnect degradation issues. This featured letter provides a critical overview of the main outcomes of current research on the use of the electrophoretic deposition (EPD) technique to produce protective coatings for SOC metallic interconnects, specifically focusing on different approaches...
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The protective properties of graphene oxide coatings functionalized with phosphorus atoms.
PublicationRecently, electrophoretically deposited graphene oxide coatings are commonly applied as an anti-corrosion layer. However, improper adjustment of electrophoretic deposition (EPD) parameters as well as the hydrophilic nature of graphene oxide contribute to the formation of defects in the coatings and the increase in the wetting properties, respectively, and thus lead to a reduction of protective properties. The growth of wetting...
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Effect of environmental temperature variations on protective properties of organic coatings
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Effect of environmental temperature variations on protective properties of organic coatings
PublicationW oparciu o model rozwoju naprężeń oraz niszczenia kumulatywnego przedyskutowano wpływ zmiennych temperatur środowiska na mechaniczną spójność i własności ochronne systemów powłokowych. Badano wpływ cykli temperaturowych pomiędzy 20 i 55 st. C oraz między -20 i 20 st. C na trwałość różnych powłokowych systemów malarskich na stali. Stosując technikę spektroskopii impedancyjnej monitorowano zmiany parametrów powłok poddanych cyklom...
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Cyclic mechanical stress impact on protective properties of organic coatings
PublicationCelem pracy jest zaprezentowanie wyników badań wpływu cyklicznych naprężeń mechanicznych na układy powłoka/metal. Powtarzające się naprężenia mechaniczne zostały zidentyfikowane jako czynnik w znaczącym stopniu przyczyniający się do degradacji powłok. Próbki składające się z powłoki epoksydowej nałożonej na stal St3SAl poddano serii 21000 cykli naprężenie-odpuszczenie. Badania przeprowadzono w zakresie odkształceń elastycznych...
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Low temperature processed MnCo2O4 and MnCo1.8Fe0.2O4 as effective protective coatings for solid oxide fuel cell interconnects at 750 °C
PublicationIn this study two materials, MnCo2O4 and MnCo1.8Fe0.2O4 are studied as potential protective coatings for Solid Oxide Fuel Cell interconnects working at 750 °C. First powder fabrication by a modified Pechini method is described followed by a description of the coating procedure. The protective action of the coating applied on Crofer 22 APU is evaluated by following the area specific resistance (ASR) of the scale/coating for 5500...
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Low temperature deposition of dense MnCo 2 O 4 protective coatings for steel interconnects of solid oxide cells
PublicationIn this work manganese cobalt spinel (MnCo2O4) coatings were deposited on steel substrates by spray pyrolysis at 390 °C. This is at much lower temperatures than previously reported (typically in excess of 900 °C). It was possible to produce coatings with well controlled thickness (2-5-10 μm). The as-deposited coatings were evaluated for their microstructural changes and electrical conductivity up to 800 °C. Results confirm the...
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Results of acoustic emission tests of corrosion protection degree of ship steel tanks covered by means of protective coatings (Phase I)
PublicationThis paper presents methods and results of the 1st series of tests of acoustic emission (AE) signals, aimed at assessing degree of corrosion protection of a tank made of hull structural steel, protected by means of a protective coating combined from polyurethane layer and concrete filler. The tests were carried outin compliance with a method specially elaborated for application to the work in question. In the method were used requirements...
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Water uptake in protective organic coatings and its reflection in measured coating impedance
PublicationWater uptake in commercially available epoxy coating on mild steel using impedance spectroscopy and gravimetry was studied. The water content in the coating was determined using the Brasher-Kingsbury equation and various methods of coating capacitance calculation used in the literature. The obtained results were compared with reference gravimetric data. An overestimation of values obtained from impedance data in relation to gravimetric...
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Protective and Suppressing Electromagnetic Interference Properties of Epoxy Coatings Containing Nano-Sized NiZn Ferrites
PublicationNano-crystalline ferrites with the chemical formula NixZn(1−x)Fe2O4, where x = 0, 0.2, 0.4, 0.6, 0.8, 1.0, were synthesized using a co-precipitation method. The obtained ferrites were investigated by X-ray diffraction (XRD). The corrosion inhibiting behavior of nano-sized ferrites was tested using carbon steel samples and 10% aqueous ferrite extracts. Results were compared with previous data obtained for micro-sized ceramic ferrites....