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Effect of water vapor on the oxidation behavior of HVAF-sprayed NiCr and NiCrAlY coatings
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)ORCID iD: 0000-0002-7663-9631
Chalmers University of Technology, Department of Environmental Inorganic Chemistry, 41296 Gothenburg, Sweden.
Chalmers University of Technology, Department of Environmental Inorganic Chemistry, 41296 Gothenburg, Sweden.
Chalmers University of Technology, Department of Environmental Inorganic Chemistry, 41296 Gothenburg, Sweden.
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2018 (English)In: Materials and corrosion - Werkstoffe und Korrosion, ISSN 0947-5117, E-ISSN 1521-4176, Vol. 69, no 10, p. 1431-1440Article in journal (Refereed) Published
Abstract [en]

Isothermal oxidation behavior of NiCr and NiCrAlY coatings deposited onto low alloy 16Mo3 steel by high-velocity air fuel (HVAF) process was investigated in 5% O-2+20% H2O+N-2 at 600 degrees C for 168h. Whereas NiCrAlY showed lower mass gain compared to NiCr, both coatings succeeded in maintaining the integrity with the substrate during the exposure without any breakaway oxidation. A thin Cr-rich oxide scale (Cr2O3) formed on NiCr, and a thin mixed oxide scale (Al2O3 with NiCr2O4) formed on NiCrAlY significantly increasing the oxidation protection in the presence of water vapor.

Place, publisher, year, edition, pages
2018. Vol. 69, no 10, p. 1431-1440
Keywords [en]
NiCr, NiCrAlY, oxidation protection, thermal spray coating, water vapor
National Category
Manufacturing, Surface and Joining Technology Corrosion Engineering
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-13036DOI: 10.1002/maco.201710005ISI: 000446266800012Scopus ID: 2-s2.0-85047644588OAI: oai:DiVA.org:hv-13036DiVA, id: diva2:1259378
Funder
Knowledge Foundation, RUN 2016-0201Region Västra Götaland, RUN 2016-01489Available from: 2018-10-29 Created: 2018-10-29 Last updated: 2019-05-28Bibliographically approved

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Sadeghimeresht, EsmaeilMarkocsan, NicolaieJoshi, Shrikant V.

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Sadeghimeresht, EsmaeilMarkocsan, NicolaieJoshi, Shrikant V.
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Materials and corrosion - Werkstoffe und Korrosion
Manufacturing, Surface and Joining TechnologyCorrosion Engineering

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