王红美,尹艳丽,帅刚,邱骥,马世宁

• 1:装甲兵工程学院装备再制造技术国防科技重点实验室

摘要(Abstract)：

在含有磷酸钠和钼酸钠的电解液中采用恒流模式对5083铝合金进行微弧氧化。研究了电流密度对氧化电压、膜层生长速率的影响;采用扫描电镜和能谱对氧化膜的表面形貌和成分进行了分析;采用电化学极化曲线测试了氧化膜的耐腐蚀性能。结果表明:在恒电流微弧氧化过程中,氧化电压出现直线快速增长和平稳增长两个阶段,且随着电流密度的增加电压逐渐增大;随着电流密度的增大,氧化膜厚度增加,其表面微弧放电产生的微孔数量逐渐减少,而"火山堆积"状形貌特征越来越明显,电流密度过大氧化膜出现局部剥落,其对氧化膜成分影响不明显;微弧氧化陶瓷膜提高了铝合金基体的耐腐蚀性能,当电流密度为7.5 A/dm2时,微弧氧化膜的自腐蚀电流为1.9×10-8A/cm2,比铝合金基体降低了1个数量级,表现出良好的耐腐蚀性能。

关键词(KeyWords)： 5083铝合金;微弧氧化;陶瓷膜;电流密度

Abstract:

Keywords:

基金项目(Foundation): 北京自然科学基金(3132024);; “十二五”装备预研基金(51327040101)

作者(Author): 王红美,尹艳丽,帅刚,邱骥,马世宁

DOI: 10.13289/j.issn.1009-6264.2016.03.028

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