Long-term corrosion behaviors and wear behavior of Fe-based amorphous coatings in different humidity environments

• A higher incidence of porosity defects in the coating is associated with reduced long-term corrosion resistance. • Reveal humidity condition effect on wear behaviors of Fe-based AMCs. • The formation of silica gel and fluid lubricating films improves wear properties. Fe-based amorphous coatings (Fe-based AMCs) were successfully prepared on Q235 carbon steel by detonation spray under different spraying parameters. The corrosion and tribology behaviors of coatings were systematically tested. The droplets show disk-like morphology with the highest circularity and expansion factor, which is crucial to reduce the defects of coatings and to form fine-lamellar-structures coatings with dense microstructure. A higher incidence of porosity defects in the coating is associated with reduced long-term corrosion resistance. Moreover, the tribo-chemical reactions between Si 3 N 4 balls and water molecules play a significant role in wear behaviors for coating in different humidity conditions. The friction coefficient and wear rate of coatings decrease as the humidity conditions increase.