Corrosion behaviour of HVOF developed Mo-based high entropy alloy coating and selected hard coatings for high temperature geothermal applications

• DOI: 10.1016/j.matdes.2023.112431
• Publication Date: 2023-10-27T01:13:17Z
• Authors: Gifty Oppong Boakye; Erlend Oddvin Str...; Baldur Geir Gunna...; Danyil Kovalov; Sigrun Nanna Karl...
• Keywords: Cermet

The corrosion behavior of High Entropy Alloy (HEA), wear-resistant cermets, self-fluxing Ni alloy, and Fe-based amorphous alloy coatings were investigated in simulated alkaline high-temperature geothermal environments with/without H2S CO2 gases for applications. Phase density the corrosive fluid (liquid/vapor) influenced test environments. NiCrSiBFe coating formed a continuous surface film while FeCrMoWMnBCSi was prone to localized liquid phase. cermet had pores cracks that led penetration CoCrFeNiMo0.85 HEA showed highest resistance all with no damage.