Effects of Anions on Corrosion Behavior of Ni-Cu-P Coatings
Ni-Cu-P coating was synthesized on copper substrate by electroless plating technique. The coating composition and corrosion resistance of Ni-Cu-P coating were characterized using energy-dispersive X-ray (EDX), electron probe micro-analyzer (EPMA), polarization curve (PC) and electrochemical impedance spectrum (EIS). The results show that the chemical nature of anions plays very important roles in the corrosion behavior of Ni-Cu-P coating. At a higher electrolyte concentration, Cl- and SO4 2- ions tend to promote the dissolution rate of Ni by their adsorption, while at lower electrolyte concentrations, NO3 - ions tend to dominate the dissolution rate of Ni-Cu-P coating.
Sihai Jiao, Zhengyi Jiang and Jinglong Bu
C. Y. Liu et al., "Effects of Anions on Corrosion Behavior of Ni-Cu-P Coatings", Advanced Materials Research, Vols. 146-147, pp. 1375-1378, 2011