丁志敏,陈凯敏,沈长斌,阎颖,高宏

• 1:大连交通大学材料科学与工程学院

摘要(Abstract)：

用AlCl3-NaCl-KCl低温熔融盐体系在Q235钢表面上获得了电镀铝层,并对电镀铝层进行微弧氧化处理。用扫描电镜和X射线衍射分析仪观察和测定了微弧氧化层的表面形貌和相结构,并对其硬度和耐蚀性能进行了测试。结果表明:Q235钢表面上的电镀铝层经不同时间的微弧氧化处理后,其表面形貌与铝及其合金经微弧氧化处理后的相似,为多孔熔融凝固形貌。经30min的微弧氧化处理后,其电镀铝层表面除了存在Al相之外,还出现了-γAl2O3相。经不同时间微弧氧化处理后,电镀铝层的表面硬度和在3.5%NaCl溶液中的电化学耐蚀性能均得到了较大程度的提高,且随微弧氧化时间的延长硬度增加,而电化学耐蚀性能先增加而后降低,最佳处理时间为20min。

关键词(KeyWords)： 电镀铝;微弧氧化;表面形貌;相结构;耐蚀性

Abstract:

Keywords:

基金项目(Foundation): 辽宁省高等学校重点实验室项目(2008S308)

作者(Author): 丁志敏,陈凯敏,沈长斌,阎颖,高宏

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