Abstract
In this study, a FeCoCrNiMnAl0.5 high-entropy alloy coating is fabricated on the surface of Q235 steel by plasma spraying FeCoCrNiMnAl0.5 powders homemade by mechanical alloying. The potential-dynamic polarization curves of FeCoCrNiMnAl0.5 HEA coatings in 3.5 wt% NaCl solution was tested using an electrochemical workstation. Phase of the HEA coating transforms from body-centered cubic to face-center cubic during spraying. The corrosion potential of the coating is higher than that of 316 stainless steel and 304 stainless steel, and the HEA coating has a corrosion current density of 9.56 × 10−6 A/cm2 which is lower than that of 316 stainless steel (1.16 × 10−5 A/cm2), and slightly higher than that of 304 stainless steel (7.35 × 10−6 A/cm2). The corrosion rate of the coating is only 1/2 of that of the 316 stainless steel.
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