镁合金微弧氧化及后续涂装耐蚀性电化学分析
Electrochemistry Analyzed on Corrosion Resistance of Micro-arc Oxidation and Organic Coating for Mg Alloy
李新波1, 孙长涛2, 郝建民3, 王 伟2
点击：3537次 下载：0次
作者单位：1. 长安大学 理学院, 陕西 西安 710064; 2. 中国船舶重工集团公司 第十二研究所, 陕西 兴平 713102; 3.长安大学 材料科学与工程学院, 陕西 西安 710064
中文关键字：微弧氧化； 耐蚀性； 阴极电泳； 极化曲线； Tafel斜率
英文关键字：micro-arc oxidization; corrosion resistance; cathode-electrophoresis; polarization curve; Tafel slope
中文摘要：采用IM6e型电化学工作站，对MB8镁合金微弧氧化及封孔涂装后试样进行电化学I/E极化曲线和Tafel斜率分析。结果表明：各种封孔工艺都能不同程度地提高微弧氧化陶瓷层的耐蚀性，其中电泳涂装降低腐蚀电流1个数量级，是良好的封孔工艺；采用水煮+有机树脂多种封孔工艺综合处理降低陶瓷层腐蚀电流2个数量级，耐蚀性最好。
英文摘要：Mg alloy MB8 was surface-modified by micro-arc oxidation (MAO). Several organic coatings were prepared on the micro-arc oxidation coating of the Mg alloy. Electrochemical workstation IM6e was used to measure the electrochemical steady state I/E polarization curves and Tafel slope of the micro-arc oxidation coating in combination with organic coatings. The results show that the organic coatings can increase various degrees of the corrosion resistance of the ceramic layer by micro-arc oxidization of the Mg alloy. Especially, the corrosion resistance of sample which used multi-technics of seal is best.