铝合金腐蚀试验研究

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摘要： 为解决钢铝混合车身的电化学腐蚀问题，尤其是电偶腐蚀，对铝合金腐蚀试验进行研究，探究不同钢铝连接材料及连接方式、不同成型工艺对铝合金腐蚀的影响。结果表明：螺接样品受电偶腐蚀和缝隙腐蚀的双重影响，腐蚀等级高于SPR铆接；铸造铝合金因成分偏析问题，防腐性能明显低于挤压型材。

关键词：铝合金 防腐蚀 电偶腐蚀

中图分类号：U465.2+2     文献标志码：B   DOI： 10.19710/J.cnki.1003-8817.20230384

Research on Aluminum Alloy Corrosion Test

Li Ying， Peng Huajiang， He Zhongshu， Zhang Chunling

（R＆D Center， Chongqing Chang’an Automobile Co.， Ltd.，  Chongqing 401120）

Abstract： To address the issue of electrochemical corrosion of steel-aluminum hybrid vehicle body， especially galvanic corrosion， corrosion test of aluminum alloy is studied to explore the influence of different steel-aluminum joining material and method， different forming process on aluminum alloy corrosion. The results show that the corrosion grade of the bolted samples is higher than that of SPR riveting due to the double effects of galvanic corrosion and crevice corrosion， whereas corrosion resistance of cast aluminum alloy is obviously lower than that of extruded profile due to segregation of components.

Key words： Aluminum alloy， Anti-corrosion， Galvanic corrosion

1 前言

防腐蚀是汽车产品的关键性能，不仅用户高度关注，同时与产品安全性能强相关。（剩余2452字）