Electrochemical behavior of electroless Ni-P-SiC nano-composite coatings

Ni-P-SiC nano-composite coatings were successfully fabricated on a P20 plastic die steel surface by combining acid etching and electroless plating process. Electrochemical behavior of coatings and substrate has also been studied by potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS). Results demonstrated that the SiC-doped Ni-P coating possessed excellent anti-corrosion property with icorr (0.813µAcm⁻²) about 6% that of steel substrate, the Ni-P-SiC nano-composite coating exhibited good corrosion resistance properties in protecting the P20 plastic die steel. (paper)