设计了模拟海洋大气环境的“溶液浸泡-气氛暴露”的加速腐蚀试验,用于研究LY12铝合金的初期腐蚀,并与同期进行的“间歇盐雾”、“周期浸泡”等的试验结果进行对比,结果如下:在腐蚀形貌方面,“周期浸泡”与“间歇盐雾”结果相似,其腐蚀程度远大于“溶液浸泡-气氛暴露”试验方法:在腐蚀增重方面,“周期浸泡”>“间歇盐雾”>>“溶液浸泡-气氛暴露”:在腐蚀深度方面,“周期浸泡”相当“间歇盐雾”、“溶液浸泡-气氛暴露”:在腐蚀后的自腐蚀电位方面,三种方法的试验结果相当.综合比较的结果是,所设计的“溶液浸泡-气氛暴露”的加速腐蚀试验,相比常用的“间歇盐雾”和“周期浸泡”试验,对LY12铝合金腐蚀的加速程度较轻.

In this paper,an accelerated corrosion test method named as “solution dipping and atmosphere exposure” was proposed for marine atmosphere corrosion and used to study the initial corrosion of LY12 aluminum alloy.The corrosion behavior such as corrosion morphology,weight gain,penetration and corrosion potential obtained by “solution dipping and atmosphere exposure” test were compared with those by intermittent salt spraying test and cyclic dipping test.The results showed that the acceleration extent of the three test methods was: cyclic dipping test > intermittent salt spraying test > “solution dipping and atmosphere exposure”.