硅酸盐学报Issue(7)：991-996,6.DOI:10.14062/j.issn.0454-5648.2015.07.23
AZ41镁合金黑色微弧氧化陶瓷层的显色、摩擦学和腐蚀特性
Color, Tribological and Corrosion Properties of Black Micro-arc Oxidation Coating on AZ41 Magnesium Alloy
摘要
Abstract
A black oxide coating was generated on AZ41 magnesium alloy surface in sodium-based electrolyte with copper salt by a micro-arc oxidation (MAO) technique. The surface morphology, component, color, corrosion resistance and friction-wear properties of the MAO coating were characterized. The results show that the gray value of the prepared black MAO coating is 48, and its apparent color appears black. The prepared black MAO coating contains the oxides of Mg, Si, Al and Cu. Cu oxides act as the main component for coloring in the black film. The massive micro-pores on the surface of black MAO coating can scatter and absorb the visible light. The high resistance and high hardness of the black MAO coating effectively enhance the corrosion resistance and wear resistance of AZ41 Mg alloy. The corrosion potential and corrosion current density of black MAO coating on AZ41 Mg alloy in 3.5%(in mass fraction) NaCl solution are 0.39 V greater and 4 orders of magnitude lower than those of conventional AZ41 Mg alloy, respectively. When the black oxide coating is worn against SiC ball, the friction factor of the black oxide coating is 0.62, which is greater than that of AZ41 Mg alloy, but its wear weightlessness rate is only 12.5% of AZ41 Mg alloy.关键词
微弧氧化/镁合金/深色膜/腐蚀/摩擦磨损Key words
micro-arc oxidation/magnesium alloy/black coating/corrosion/friction and wear分类
通用工业技术引用本文复制引用
寇钢,白力静,王盼,王武孝,王雁鑫..AZ41镁合金黑色微弧氧化陶瓷层的显色、摩擦学和腐蚀特性[J].硅酸盐学报,2015,(7):991-996,6.基金项目
腐蚀与防护四川重点实验室资助项目(2013CL09)；陕西省大学生创新性实验项目(0951)。 （2013CL09）
