Electrochemical behaviours of (NiCoFeCrCu)₉₅B₅ high entropy alloy coatings

Abstract

Plasma transferred arc cladding process was used to fabricate (NiCoFeCrCu)₉₅B₅ multielement alloy coating. The microstructure and electrochemical behaviours of the coating were investigated. Results show that the precipitation of intermetallic compounds in the coating is effectively inhibited by the rapid solidification process. The coating has simple ordered body centred cubic and face centred cubic solid solution phases. The as prepared coating has excellent corrosion resistance in hydrochloric acid solution. The corresponding corrosion current and corrosion rates are effectively reduced, and the electrochemical impedance is significantly improved referenced to those of the 304 stainless steel.

Keywords:

• Corrosion
• Coatings
• High entropy alloys