一、前言铝和铝合金在氯化物溶液中,特别是在含有象铜那样的电位更正的金属离子的溶液中,对点蚀是敏感的。为了避免这个问题,曾作过各种尝试,但至今仍未能得到彻底解决。研究了各种添加元素的影响,作者已发现添加少量锌事实上可显著改善铝合金的抗点蚀性能。在这篇报告中,藉助于浸泡试验来显示锌对铝-镁和铝锰-合金的影响,并讨论这一影响与电化学极化测量之间的关系。二、试验程序 I. INTRODUCTION Aluminum and aluminum alloys are sensitive to pitting corrosion in chloride solutions, especially in solutions containing metal ions such as copper, whose potential is corrected. In order to avoid this problem, various attempts have been made, but so far they have still not been completely solved. The effects of various added elements were investigated. The authors have found that adding a small amount of zinc in fact can significantly improve the pitting corrosion resistance of the aluminum alloy. In this report, the effect of zinc on aluminum-magnesium and aluminum-manganese-alloys is demonstrated by means of a soaking test and the relationship between this effect and electrochemical polarization measurements is discussed. Second, the test procedure