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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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添加剂对镁合金微弧氧化膜性能的影响
Keywords: 金属材料,镁合金,微弧氧化,添加剂,电化学性能
Abstract:
？在偏铝酸盐--六偏磷酸盐体系中对镁合金进行微弧氧化处理,研究了金属盐缓蚀剂钨酸盐、多元醇或酸等添加剂对氧化膜性能的影响.通过正交实验优化和对微弧氧化膜结构、成分及性能的测试评价,得到了性能较好的微弧氧化电解液配方.sem检测发现,复合添加剂(na2edta1g/l,ch3(ch2})11so3na0.5g/l)通过抑制破坏性的微弧,能促进成膜、降低起弧电压,得到结构更加均匀和完整的陶瓷涂层;xrd检测表明,膜层的主要成分是mgo、mg3(po4)2、mgal2o4和alpo4等化合物;中性盐水腐蚀测试表明,陶瓷膜在48h内具有较平缓的腐蚀速度;eis和动电位极化曲线表明,在电解液中加入复合添加剂使镁合金试样微弧氧化膜的耐腐蚀性能得到了很大的提高.
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