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

Kód výsledku v 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>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

JK - Koroze a povrchové úpravy materiálu

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

24th International Conference on Metallurgy and Material-Metal 2015

ISBN

978-80-87294-62-8

ISSN

—

e-ISSN

—

Počet stran výsledku

2149

Strana od-do

1081-1086

Název nakladatele

Tanger Ltd.

Místo vydání

Ostrava

Místo konání akce

Hotel VoroněžI, Brno, Czech Republic, EU

Datum konání akce

—

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—