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High-Temperature Co...
High-Temperature Corrosion of HVAF-Sprayed Ni-Based Coatings for Boiler Applications
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- Eklund, Johan, 1991 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Energy and Materials, Department of Chemistry and Chemical Engineering, Göteborg, 412 96, Sweden
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- Phother Simon, Julien, 1991 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Energy and Materials, Department of Chemistry and Chemical Engineering, Göteborg, 412 96, Sweden
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- Sadeghi, Esmaeil, 1985- (författare)
- Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT)
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- Joshi, Shrikant V., 1960- (författare)
- Högskolan Väst,Forskningsmiljön produktionsteknik(PTW),PTW
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- Liske, Jesper, 1978 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Energy and Materials, Department of Chemistry and Chemical Engineering, Göteborg, 412 96, Sweden
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(creator_code:org_t)
- 2019-03-14
- 2019
- Engelska.
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Ingår i: Oxidation of Metals. - : Springer Science and Business Media LLC. - 1573-4889 .- 0030-770X. ; 91:5-6, s. 729-747
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Abstract
Ämnesord
Stäng
- The present study investigates the initial corrosion behaviour of HVAF-sprayed NiCr, NiAl and NiCrAlY coatings in two different environments, O 2 + H 2 O and O 2 + H 2 O + KCl at 600 °C for up to 168 h in order to evaluate the possibility of utilizing such coatings in biomass- and waste-fired boilers. SEM/EDX analysis showed that all coatings displayed a protective behaviour in O 2 + H 2 O. Upon addition of KCl (O 2 + H 2 O + KCl), the corrosion behaviour of the NiCr coating drastically changed as it formed a thick oxide layer and displayed major chlorine diffusion down to the substrate. The NiCrAlY coating displayed a significantly better corrosion resistance with only minor oxide formation. The NiAl coating exhibited a protective behaviour similar to when exposed in the absence of KCl indicating that a thin protective oxide has formed on the coating surface. The performance of the NiAl and NiCrAlY coatings is promising for future studies with long-term exposures in more corrosive environments such as in a biomass- and waste-fired boiler.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Medicinteknik -- Medicinsk material- och protesteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Medical Engineering -- Medical Materials (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Korrosionsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Corrosion Engineering (hsv//eng)
Nyckelord
- HVAF
- KCl-induced corrosion
- Ni-based coatings
- Waste
- Biomass
- Manufacturing and materials engineering
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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