High temperature corrosion behavior of selected thermally sprayed alloy based coatings in aggressive environment at 690 °C

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47718684%3A_____%2F19%3AN0000009" target="_blank" >RIV/47718684:_____/19:N0000009 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

High temperature corrosion behavior of selected thermally sprayed alloy based coatings in aggressive environment at 690 °C

Popis výsledku v původním jazyce

This study is focused on the hot corrosion evaluation of selected thermal sprayed coatings. NiCoCrAlYHfSi, NiCoCrAlY, NiCoCrAlTaReY and CoCrAlYTaCSi coatings were sprayed on the substrate material 1.4923. This material is used as a cost-efficient construction material for components of power equipment. All evaluated coatings were sprayed using HP/HVOF (High Pressure / High Velocity Oxygen Fuel) technology. Hot corrosion studies were performed in a molten salt environment typical for coal-fired boilers. All coatings were exposed to the environment of Na2SO4 and 82 % Fe2 (SO4)3 at the temperature of 690 °C under cyclic conditions. Each cycle consisted of 1h heating in silicon carbide tube furnace followed by 20 min of cooling. The weight change measurement was performed after each cycle to establish the corrosion kinetics. Scanning electron microscopy (SEM), elemental analysis (EDS) and optical microscopy (OM) were used to analyze the corrosion mechanism. CoCrAlYTaCSi coating showed the best corrosion resistance of all evaluated coatings.

Název v anglickém jazyce

High temperature corrosion behavior of selected thermally sprayed alloy based coatings in aggressive environment at 690 °C

Popis výsledku anglicky

This study is focused on the hot corrosion evaluation of selected thermal sprayed coatings. NiCoCrAlYHfSi, NiCoCrAlY, NiCoCrAlTaReY and CoCrAlYTaCSi coatings were sprayed on the substrate material 1.4923. This material is used as a cost-efficient construction material for components of power equipment. All evaluated coatings were sprayed using HP/HVOF (High Pressure / High Velocity Oxygen Fuel) technology. Hot corrosion studies were performed in a molten salt environment typical for coal-fired boilers. All coatings were exposed to the environment of Na2SO4 and 82 % Fe2 (SO4)3 at the temperature of 690 °C under cyclic conditions. Each cycle consisted of 1h heating in silicon carbide tube furnace followed by 20 min of cooling. The weight change measurement was performed after each cycle to establish the corrosion kinetics. Scanning electron microscopy (SEM), elemental analysis (EDS) and optical microscopy (OM) were used to analyze the corrosion mechanism. CoCrAlYTaCSi coating showed the best corrosion resistance of all evaluated coatings.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20506 - Coating and films

Projekt

<a href="/cs/project/TE01020068" target="_blank" >TE01020068: Centrum výzkumu a experimentálního vývoje spolehlivé energetiky</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

International Thermal Spray Conference and Exposition: New Waves of Thermal Spray Technology for Sustainable Growth

ISBN

978-151088800-5

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

Code 152135

Název nakladatele

ASM International

Místo vydání

USA

Místo konání akce

PACIFICO YokohamaYokohama; Japan

Datum konání akce

26. 5. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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