A7N01S-T5型铝合金在清洗剂中的点蚀敏感性研究

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.