镁、铝合金间的连接腐蚀行为及不同表面处理的保护效果研究

蒋百灵; 袁 芳; 袁 森; 时惠英; 袁 兵

引用本文:	蒋百灵,袁芳,袁森,时惠英,袁兵.镁、铝合金间的连接腐蚀行为及不同表面处理的保护效果研究[J].中国表面工程,2005,(5):39~42
	.Study on Junction Corrosion of Magnesium Alloy Coupled With Aluminum Alloy and Protection Effects of Different Surface Treatment[J].China Surface Engineering,2005,(5):39~42

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镁、铝合金间的连接腐蚀行为及不同表面处理的保护效果研究
蒋百灵，袁芳，袁森，时惠英，袁兵

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摘要:

按照GB/T10125-1997《人造气氛腐蚀试验盐雾试验》试验标准,采用对比试验,对镁合金与铝合金连接的腐蚀行为进行研究。结果表明:由于镁合金电极电位低于铝合金,因此,镁合金与铝合金连接后,置于含NaCl的腐蚀气氛时,发生电偶腐蚀,加速了镁合金的全面腐蚀;当对镁合金进行适当的表面处理后,腐蚀明显减少,且有电偶腐蚀效应大大减小;在两种表面处理工艺的对比中,微弧氧化处理效果较佳。

关键词: 镁合金连接腐蚀微弧氧化

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基金项目:国家"十·五"科技攻关计划(2001BA311A063)

Study on Junction Corrosion of Magnesium Alloy Coupled With Aluminum Alloy and Protection Effects of Different Surface Treatment

JIANG Bai-ling, YUAN Fang, YUAN Sen，SHI Hui-ying，YUAN Bing

Abstract:

The corrosion behaviors of magnesium alloy coupled with aluminum alloy were investigated by applying GB/T 10125-1997 test criteria and using contrast test in this paper.The results showed that the galvanic corrosion occurrs on magnesium alloy due to the lower electrode potential when the two alloys linked together,and the general corrosion was accelerated.The suitable surface treatments on magnesium alloy can reduce the corrosion and the galvanic corrosion effect is decreased.The Micro-arc Oxidation Coating was better than the other.

Key words: magnesium alloy junction corrosion Micro-arc Oxidation