【作者】 原旭芳；

【导师】 孙晶； 潘利华；

【作者基本信息】 长春理工大学 ， 无机化学， 2008， 硕士

【摘要】 本文采用微弧氧化技术在SJDM-1稀土镁合金表面获得了不同色度的耐腐蚀性好的陶瓷膜层,膜层显示不同的颜色是由于膜层中着色剂的种类及配比引起的。经过SEM、XRD、膜层测厚仪和点滴实验、盐雾实验等测试,分析结果表明此陶瓷层相组成主要为MgO、ZnO、Zr₃O、Mg₂SiO₄和Mg₁₄（SiO₄）₅O₄和着色剂的氧化物,而且膜层致密度越高,耐蚀性越好,膜层经过盐雾实验96小时,腐蚀级别为10级,微弧氧化后水合封孔的稀土镁合金耐蚀性是未封口的19倍,并且阴极材质、距离、面积对陶瓷层耐蚀性都有影响。陶瓷层腐蚀的主要原因是膜层表面发生的大阴极小阳极的点腐蚀过程。电解液失效是因为微弧氧化过程中电解质之间、电解质和水及其它介质（如空气）之间发生了复杂的化学反应。更多还原

【Abstract】 In this dissertation, the different color ceramic coatings of the good corrosion resistance were obtained by micro-arc oxidation technology on the SJDM-1 Rare earth magnesium-alloys surface. The ceramic coatings showed different color is due to the type and the proportion of the coloring agents in the film. After SEM, XRD, the coating thickness tester and drop experiment, the salt spray corrosion experiment, the analysis was shown that this ceramic layer was mainly composed of MgO, ZnO, Zr₃O, Mg₂SiO₄ and Mg₁₄（SiO₄）₅O₄ and the oxides of coloring agents, and the higher the density of the film, the better corrosion resistance of the film. In addition, after 96 hours of salt spray corrosion experiment, the rating of corrosion was 10. The corrosion resistan of the rare earth magnesium-alloys after sealing hydrated was not sealed 19 times after micro-arc oxidation, and the cathode material, distance, area on the corrosion resistance of ceramic layer had implications.The main reason of ceramic layer corrosion was point corrosion process of the big cathode small anode that happend on the surface of coatings. Failure electrolyte was because there were complex chemical reactions between the electrolyte and electrolyte, the electrolyte and water and other media （such as air） in the micro-arc oxidation process.更多还原