HIGH TEMPERATURE HOT CORROSION BEHAVIOR OF SELECTED THERMALLY SPRAYED COATINGS ON X22 STAINLESS STEEL IN AN AGGRESSIVE ENVIRONMENT AT 750 °C

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47718684%3A_____%2F15%3A%230000600" target="_blank" >RIV/47718684:_____/15:#0000600 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

HIGH TEMPERATURE HOT CORROSION BEHAVIOR OF SELECTED THERMALLY SPRAYED COATINGS ON X22 STAINLESS STEEL IN AN AGGRESSIVE ENVIRONMENT AT 750 °C

Original language description

Cr3C2-NiCr, Cr3C2-CoNiCrAlY, TiMoCN-Ni (experimental coating), Stellite 6, NiCrBSi and Hastelloy C-276 coatings were deposited on substrate material Wr.Nr. 1.4923 (X22) which, in nitrided state, is used as an effective constructional material for components in power equipment. All evaluated coatings were deposited using the HVOF (High Velocity Oxygen Fuel) thermal spraying technology. The evaluation of resistance against high temperature corrosion was conducted for all selected thermally sprayed coatings. Furthermore, corrosion resistance comparative study between coating surface protection and nitrided stainless steel X22 was also carried out. All evaluated coatings were exposed to corrosive-aggressive environment in the form of molten salts mixture with composition of 60% V2O5 and 40% Na2(SO)4 at the selected temperature of 750 °C. Further, all coatings were exposed to cyclic conditions. Each cycle included one hour long exposure of evaluated coatings with salts mixture layer on the surface at 750 °C in a silicon carbide furnace. 20 minutes cooling in air followed the exposure period. Weight changes of individual samples were measured after every cycle and the results were recorded in the diagram. After the corrosion tests, all coatings were analyzed using scanning electron microscope (SEM), and also the analysis of elemental composition (EDAX) was conducted. Alloys-based coatings showed very similar corrosion mechanism in the selected aggressive environment and the same can be stated about cermet coatings. The obtained results prove that the HVOF deposited coatings can replace current surface protection of components in power equipment such as nitriding.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

JK - Corrosion and material surfaces

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

24th International Conference on Metallurgy and Material-Metal 2015

ISBN

978-80-87294-62-8

ISSN

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e-ISSN

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Number of pages

2149

Pages from-to

1081-1086

Publisher name

Tanger Ltd.

Place of publication

Ostrava

Event location

Hotel VoroněžI, Brno, Czech Republic, EU

Event date

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Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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