A7N01S-T5型铝合金在清洗剂中的点蚀敏感性研究  

Study on the Pitting Sensitivity of A7N01S-T5 Aluminum Alloy in Degreasers

作　　者：赵民[1] 姜代旬[1] 

机构地区：[1]南车青岛四方机车车辆股份有限公司技术工程部,山东青岛266111

出　　处：《全面腐蚀控制》2014年第1期65-68,共4页Total Corrosion Control

摘　　要：采用极化曲线方法研究了A7N01S-T5型铝合金在某系列的不同pH值清洗剂中的点蚀行为。试验结果表明铝合金在该系列中性、酸性和碱性清洗剂中均会发生点蚀,而铝合金点蚀敏感性的大小与清洗剂的pH值有关,pH值主要通过影响铝合金表面氧化膜和腐蚀产物膜的稳定性来影响铝合金的耐点蚀性能。In order to obtain the pitting corrosion sensitivity of aluminum alloy, the polarization curve was used to study the pitting corrosion behavior of A7N01S T5 aluminum alloy in a certain series of degreasers. The results of experiments indicated pH value of the degreasers and corrosion products had a great influence on pitting sensitivity of aluminum alloy. PH value mainly affected the stability of the surface oxidation film of aluminum alloy, and the corrosion products influenced the pitting sensitivity of aluminum alloy through forming the dense isolation layer.

关 键 词：铝合金 清洗剂 点蚀 极化曲线 

分 类 号：TG172[金属学及工艺—金属表面处理]