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利用微弧氧化技术对AZ91D镁合金在硅酸盐和锆盐溶液中进行表面陶瓷化处理,发现电参数对膜层厚度有很大影响。并采用IM6e型电化学工作站,对微弧氧化镁合金进行电位极化曲线测量。通过电化学测量对微弧氧化镁合金的腐蚀行为进行分析。用处理好的镁合金进行腐蚀实验,用失重法和极化法测试其耐蚀性,发现电解液中锆元素会大大提高膜层的耐蚀性。同时通过XRD分析发现硅酸盐电解液中制备的陶瓷膜主要由Mg2SiO4、MgO和MgF2等相组成,锆盐电解液中制备的陶瓷膜主要由MgO、MgF2和ZrO2相组成。
Micro-arc oxidation of AZ91D magnesium alloy in silicate and zirconium salt solution surface ceramic treatment found that the electrical parameters of the film thickness has a great impact. The IM6e electrochemical workstation was used to measure the potential polarization curve of micro-arc magnesium alloy. The corrosion behavior of MAO alloy by electrochemical measurement was analyzed. With a good magnesium alloy corrosion test, using the weight loss method and polarization test of its corrosion resistance and found that the electrolytic solution of zirconium will greatly improve the corrosion resistance of the film. At the same time, it was found by XRD analysis that the ceramic membranes prepared in silicate electrolyte mainly consisted of Mg2SiO4, MgO and MgF2 phases. The ceramic membranes prepared from zirconium electrolyte mainly consisted of MgO, MgF2 and ZrO2 phases.