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整车强化腐蚀试验雨刮臂座起泡失效分析

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本文研究了铝合金的雨刮臂座和热镀锌雨刮臂之间的电偶腐蚀问题,通过SEM试验、金相试验、循环腐蚀试验对某雨刮臂供应商在整车强化腐蚀试验的失效进行分析,并研究了不同铝合金材料对电偶腐蚀性能的影响及整车强化腐蚀试验同中性盐雾试验和循环腐蚀试验之间的相关性,试验结果表明,循环腐蚀试验和整车强化腐蚀试验相关性较中性盐雾试验同整车强化腐蚀试验相关性较好,铝合金臂座更换为低铜铝合金后,对电偶腐蚀的改善较好,通过SEM分析对其机理进行分析,主要是材料改为低铜铝合金后,降低了合金内部的电位差,合金内部的电偶腐蚀效应得到了明显的改善,对未来研究电偶腐蚀方面的相关内容提供了指导意义.
Failure Analysis of Wiper Arm Seat Foaming at the Experiment of Vehicle Enhanced Corrosion Test
This paper studies the galvanic corrosion between aluminum alloy wiper arm and hot-dip galvanized wiper arm.Through SEM test,metallographic test and cyclic corrosion test,the failure of a wiper arm supplier in the vehicle enhanced corrosion test is analyzed.The effects of different aluminum alloy materials on galvanic corrosion properties and the correlation between the vehicle enhanced corrosion test,neutral salt spray test and cyclic corrosion test were studied.The test results show that the correlation between cyclic corrosion test and vehicle enhanced corrosion test is better than that between neutral salt spray test and vehicle enhanced corrosion test.The mechanism is analyzed by SEM analysis.The main reason is that the potential difference inside the alloy is reduced after the material is changed to low-copper aluminum alloy,and the galvanic corrosion effect inside the alloy is significantly improved,which provides guiding significance for future research on galvanic corrosion related content.

corrosion mechanismwiper armcorrelationsgalvanic corrosion

李经奇、陈敏娟、谢丽丽、宋子恒、沈洋

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吉利汽车研究院(宁波)有限公司,宁波 315336

腐蚀机理 雨刮臂 相关性 电偶腐蚀

2024

环境技术
广州电器科学研究院有限公司

环境技术

CSTPCD
影响因子:0.995
ISSN:1004-7204
年,卷(期):2024.42(11)