海水干湿交替环境对铝合金牺牲阳极性能的影响  

Effect of Wet-Dry Cycling on Performance of Aluminum Alloy Sacrificial Anodes in Seawater

作　　者：黄振风[1,2] 郭建章[1] 刘广义[2] 杜建平[2] 马力[2] 陈志杰 

机构地区：[1]青岛科技大学机电工程学院,青岛266061 [2]中国船舶重工集团公司第七二五研究所海洋腐蚀与防护重点实验室,青岛266101 [3]青岛双瑞海洋环境工程股份有限公司,青岛266101

出　　处：《腐蚀与防护》2016年第2期160-164,共5页Corrosion & Protection

基　　金：科工局技术基础项目(H082012B001)

摘　　要：在海水干湿交替条件下研究了干湿比、环境湿度对铝合金牺牲阳极电化学性能的影响,分析了铝合金牺牲阳极的溶解形貌、腐蚀产物以及电流效率,讨论了造成铝阳极电化学性能差异的原因。结果表明:随着干湿比的增大,铝合金牺牲阳极开路电位和工作电位升高,阳极电流效率由96.4%降低至76.5%,铝合金牺牲阳极表面由均匀腐蚀转变为局部腐蚀;环境湿度的增加在一定程度上加剧了铝合金牺牲阳极的局部腐蚀,降低了其电化学性能。Effects of wet-dry ratio and humidity on the electrochemical properties of aluminum alloy sacrificial anodes were investigated under the condition of alternation of drying and wetting in seawater. The dissolution morphology, corrosion products and current efficiency of sacrificial anodes were also studied, respectively, to analyze the reasons for performance difference. The results show that with the increase of wet-dry ratio, the open circuit potential and working potential of the sacrificial anodes increased, and the current efficiency of the anodes decreased from 96.4% to 76.5%, and the uniform dissolution of the anodes changed into serious localized corrosion. The increase of humidity also decreased the electrochemical properties of the anodes and enhanced localized corrosion to some extent.

关 键 词：铝合金 牺牲阳极 干湿比 湿度 

分 类 号：TG174.41[金属学及工艺—金属表面处理]