化工学报 ›› 2011, Vol. 62 ›› Issue (10): 2861-2866.
• 表面与界面工程 • 上一篇 下一篇
余会成,袁爱群,韦冬萍,谭学才,韩燕燕
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To improve the corrosion resistance of trivalent chromium coatings, trivalent chromiumzirconium hybrid coatings were prepared on 6063 aluminum alloy by using chromic potassium sulfate and zirconium sulfate, and phosphoric acidPolarization curves and electrochemical impedance spectroscopy(EIS)were used to investigate the electrochemical characteristics of chromiumzirconium hybrid coatings formed in plating solutions of different concentrations of zirconium sulfate, and better corrosion resistance was confirmedCompared with the coatings without zirconium sulfate plating and bare aluminum alloy, polarization curves showed that the hybrid coatings formed in 08—12 g·L-1 Zr〖DK〗(SO4)2 plating solution had more positive corrosion potential, and lower corrosion current density.Electrochemical parameters of EIS indicated that the hybrid coatings had higher resistance and charge transfer resistance.The morphology and composition of the coatings were examined by SEM and EDS, respectivelyThe results showed that the morphology of coatings remained almost unchanged and the coatings mainly consisted of Cr, Zr, P, and O after addition of zirconium sulfate, and the chromiumzirconium hybrid coatings were formed on 6063 Al alloy
余会成, 袁爱群, 韦冬萍, 谭学才, 韩燕燕. 以6063铝合金为基底的三价铬与锆杂化转化膜的制备及其电化学特征[J]. 化工学报, 2011, 62(10): 2861-2866.
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