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The iron effect on ...
The iron effect on hot corrosion behaviour of MCrAlX coating in the presence of NaCl at 900 °C
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- Zhang, Pimin, 1990- (author)
- Linköpings universitet,Konstruktionsmaterial,Tekniska fakulteten
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- Li, Xin-Hai (author)
- Siemens Industrial Turbomachinery AB, Finspång, Sweden
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- Moverare, Johan, 1973- (author)
- Linköpings universitet,Konstruktionsmaterial,Tekniska fakulteten
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- Peng, Ru Lin, 1960- (author)
- Linköpings universitet,Konstruktionsmaterial,Tekniska fakulteten
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(creator_code:org_t)
- Elsevier BV, 2020
- 2020
- English.
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In: Journal of Alloys and Compounds. - : Elsevier BV. - 0925-8388 .- 1873-4669. ; 815
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Cyclic hot corrosion tests of two MCrAlX coatings with different Fe contents were carried out in a molten salt (75 wt% Na2SO4 + 25 wt% NaCl) environment at 900 °C under type I hot corrosion. The positive effect of high Fe addition which reduces the advancing of corrosion front in the coating was discussed. The experimental results showed that the main corrosion reaction is the basic fluxing of Al, while Fe is relatively inert. Combined with thermodynamic modelling, it was demonstrated that a high Fe addition in MCrAlX coatings shifts the equilibrium Al content of the γ phase towards a low level and also reduces the loss of Cr from coating to the substrate. Both effects contributed to a higher “effective” Al supply of the coating to resist basic fluxing and thereby enhance the coating resistance to hot corrosion by reducing the rate of advancing of the corrosion front.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)
Keyword
- Iron effect
- Type I hot corrosion
- MCrAlX coating
- Thermodynamic
- Effective Al content
Publication and Content Type
- ref (subject category)
- art (subject category)
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