ZL101A铝合金微弧氧化工艺参数优化及机理研究

Optimization of Technological Parameters and Mechanism Study of Micro-Arc Oxidation Process on ZL101A Aluminum Alloy

为了提高ZL101A铝合金微弧氧化涂层的质量,通过正交试验优化微弧氧化工艺参数,采用扫描电镜(SEM)、X射线衍射仪(XRD)、体视显微镜、电化学工作站等,研究了工艺参数的变化对ZL101A铸造铝合金微弧氧化陶瓷涂层性能的影响,并探讨了铸造铝合金的微弧氧化机理。结果表明:正交试验优化的电解液参数为18g/L硅酸钠,3 g/L氢氧化钾,4 g/L氟化钠;正交试验能减少重复试验的次数,有效提高试验效率,验证试验表明利用正交试验得到的工艺参数进行微弧氧化处理后,涂层的性能有了很大提升。

In order to explore the reasonable parameters of micro-arc oxidation process and further improve the quality of micro-arc oxidation coating,the micro-arc oxidation parameters of ZL101 A aluminum alloy were optimized by orthogonal test. The effects of various technological parameters on the properties of micro-arc oxidation ceramic coating on ZL101 A cast aluminum alloy were studied by scanning electron microscope( SEM),X-ray diffractometer( XRD),stereomicroscope and electrochemical workstation,and the micro-arc oxidation mechanism of cast aluminum alloy was investigated. Results showed that the optimized process parameters were as follows: 18 g/L sodium silicate,3 g/L potassium hydroxide,4 g/L sodium fluoride. Furthermore,the orthogonal method could reduce the number of repeated experiments and improve the test efficiency effectively. Moreover,the verification test indicated that the performance of the coating prepared with the micro-arc oxidation parameters from orthogonal method was greatly improved.