加工态与铸造态的AZ40镁合金阳极氧化耐蚀性对比  

Effect of processing status on corrosion resistance of AZ40 magnesium alloy anodized

作　　者：陈一胜[1] 刘永丹[1] 朱志云[1] 刘坚锋[1] 熊仕显[1] 

机构地区：[1]江西理工大学材料与化学工程学院,江西赣州341000

出　　处：《轻合金加工技术》2009年第5期44-47,共4页Light Alloy Fabrication Technology

摘　　要：利用正交试验确定了阳极氧化电解液配方,通过比较铸造态和加工态AZ40镁合金金相组织、阳极氧化膜表面形貌、极化曲线,解释加工状态对AZ40镁合金阳极氧化耐蚀性的影响。结果表明,加工态镁合金的腐蚀速率为87.732 02 mg/(m2.h),铸造态镁合金的腐蚀速率为106.37 mg/(m2.h)。由于加工态镁合金的合金元素参与阳极氧化,使膜层结合更致密,表面几乎没有裂纹,对基体更具有保护性。Comparison of casting and machining-state AZ40M magnesium alloy microstructure, orthogonal factors, anodizing membrane surface morphology and the potentiodynamic polarization curve, to explain the affect of processing status for magnesium alloy AZ40 anodizing corrosion resistance. The results show that, the corrosion rate of processing magnesium alloy is 87.732 02 nag/（m^2·h） ,the corrosion rate of casting magnesium alloy is 106.37 mg/（m^2·h）. Because the elements of processing magnesium alloy involved in anodized, so that the surface of membrane more compact and surface almost no crack, the matrix more protection.

关 键 词：镁合金 阳极氧化 腐蚀 极化曲线 

分 类 号：TG136.1[一般工业技术—材料科学与工程]