人工晶体学报2017，Vol.46Issue(9)：1809-1813,1817,6.
镁合金表面制备Al2O3/Ni复合涂层抗腐蚀性的研究
Corrosion Resistance of Al2O3/Ni Composite Coating Prepared on Mg Alloy Surface
摘要
Abstract
Al2 O3/Ni composite coating was deposited on AZ 91D Mg alloy in two different proportions by electrophoretic deposition technique in order to improve the corrosion resistance of Mg alloy , and after dried for 12 h in a dry container , vacuum sintering densification process at 300 ℃ for 4 h is following. Surface morphology , compositions and microstructures of the coating were investigated using scanning electron microscopy(SEM), energy dispersive spectrometer (EDS) and X-ray diffraction(XRD) as well. Corrosion resistances of the coating were evaluated in 3.5wt% NaCl solution by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS).The result showed that compared to the pure Al2O3 coating, the porosity of Al2O3/Ni composite coating decreases due to the addition of Ni , and the mismatch of thermal expansion coefficient of the coating and Mg alloy is reduced , and the bonding strength is enhanced .In the coatings of four different ratios , the composite coating with a mass ratio of Al2 O3 and Ni is 1:3.The surface of the composite coating more smooth and compact , and the corrosion resistance properties of the coating is better .关键词
电泳沉积/镁合金/Al2O3/Ni复合涂层/抗腐蚀Key words
electrophoretic deposition/Mg alloy/Al2 O3/Ni composite coating/corrosion resistance分类
化学化工引用本文复制引用
范烨力,王伟..镁合金表面制备Al2O3/Ni复合涂层抗腐蚀性的研究[J].人工晶体学报,2017,46(9):1809-1813,1817,6.基金项目
上海工程技术大学研究生创新项目(16KY0507) （16KY0507）
