Corrosion Behavior of FeCrMoCBY Amorphous Coating Fabricated by High-Velocity Air Fuel Spraying

For the purpose of enhancing the corrosion resistance of AISI 1045 mild steel, (Fe48Cr15Mo14C15B6Y2, at.%) Fe-based amorphous alloy coating (Fe-AAC) has been fabricated via a high-velocity air fuel (HVAF) spraying process. The corrosive performances of Fe-AAC under electrochemical corrosive conditions and a neutral salt spray environment were investigated. Experimental results show that the Fe-AAC has a hardness of ~ 900 HV0.1, a crystallization temperature of ~ 950 K, and a thickness of 300 μm. The Fe-AAC shows better corrosion-preventing performances under electrochemical corrosive conditions compared with steel, such as a low corrosion current density of ~ 1.13 × 10−5 A and a corrosion potential of ~ − 0.458 V in NaCl solution. Under a neutral salt spray environment, Fe-AAC also exhibits outstanding long-term corrosion resistance. After 15 days of neutral salt spray tests, no obvious red rust or peeling can be found on the surface of Fe-AAC.