A Novel Fe-Based Amorphous Powder and Coating with Excellent Wear and Corrosion Resistance

A novel amorphous powder with the composition Fe43.6Ni17.4Cr9Co6Si1.5B17.5Nb5 was prepared by the high-pressure Ar gas atomization method. The amorphous coating was fabricated on an A32 hull steel substrate by high-velocity oxygen fuel (HVOF), and the wear and corrosion behavior was investigated. The results show that the amorphous coating exhibits a dense and uniform structure, with 0.9% porosity. Compared with the A32 hull steel, the coefficient of friction (COF) and the wear rate of the amorphous coating are steady and low (0.4 and 4.5 ± 2.1 × 10−5 mm3 N−1 m−1) under a 10 N load. The coating wear mechanism is oxidation wear, accompanied by peeling wear. The amorphous coating displays a wide passive region and a low Icorr (artificial seawater solution for 6.378 ± 0.021 × 10−7 A cm−2), indicating that the amorphous coating has excellent corrosion resistance. This work shows that the novel Fe-based amorphous coating possesses excellent corrosion and wear resistance and is a good prospect for industrial and commercial applications.