Abstract
Abstract Crack-free Cr 13 Ni 5 Si 2 based composite coatings were prepared by laser-induction hybrid cladding. Corrosion resistances of the coatings were investigated by dynamic polarization, electrochemical impedance spectroscopy and immersion tests in 1 N HCl solution. Results indicate that the coatings have better corrosion resistance than the stainless steel 1Cr18Ni9Ti, and the corrosion mechanism of the coatings is micro-galvanic corrosion between the Cr 13 Ni 5 Si 2 and the Ni − based solid solution. Compact passive film was formed on the surface of the coating owing to its high content of Cr and Si, which can effectively protect the Cr 13 Ni 5 Si 2 based composite coatings from severe chemical attacking.
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