拉伸预变形对2219铝合金板材局部腐蚀性能的影响

材料科学与工程

拉伸预变形对2219铝合金板材局部腐蚀性能的影响

陈高剑，

刘胜胆，

覃秋慧，

伍英明，

何克准，

贾桂龙，

张航，

赵千愉

中国有色金属学报

第34卷, 第11期

pp.3583-3594

纸质出版 2024-11-28

DOI：10.11817/j.ysxb.1004.0609.2024-45051

中图分类号：TG146.2

11600

采用浸泡实验、电化学测试、扫描开尔文测试(SKPFM)、电子背散射衍射分析(EBSD)以及透射电子显微镜(TEM)等手段，研究拉伸预变形量(0~10%)对2219铝合金板材局部腐蚀性能的影响。结果表明，随着预变形量增加，最大腐蚀深度和腐蚀电流密度减小，腐蚀形式从晶间腐蚀为主逐渐转变为点蚀为主，腐蚀性能提高；预变形量从0%增大到4%时，最大腐蚀深度快速减小，而后缓慢减小。通过对比预变形前后晶界微观组织特征以及晶内和晶界区域伏打电势的变化，分析和探讨了腐蚀形式变化及腐蚀性能提高的原因。

2219铝合金预拉伸变形局部腐蚀性能伏打电势晶界析出相

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