Effect of water vapor on the oxidation behavior of HVAF-sprayed NiCr and NiCrAlY coatings
Journal article, 2018

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.

NiCr

water vapor

oxidation protection

NiCrAlY

thermal spray coating

Author

Esmaeil Sadeghimeresht

University West

Johan Eklund

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry

Julien Phother Simon

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry

Jesper Liske

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry

Nicolaie Markocsan

University West

Shrikant Joshi

University West

Materials and Corrosion - Werkstoffe und Korrosion

0043-2822 (ISSN) 1521-4176 (eISSN)

Vol. 69 10 1431-1440

Subject Categories

Manufacturing, Surface and Joining Technology

Metallurgy and Metallic Materials

Corrosion Engineering

DOI

10.1002/maco.201710005

More information

Latest update

1/7/2019 1