A1-Zn-In-Mg-Ga-Mn牺牲阳极腐蚀防护行为研究  

CORROSION PROTECTION OF Al-Zn-In-Mg-Ga-Mn ALUMINOUS SACRIFICIAL ANODE

作　　者：黄燕滨[1] 宋高伟[1] 刘学斌[1] 丁华东[1] 闫永贵[2] 邵新海[1] 

机构地区：[1]装甲兵工程学院装备再制造工程系,北京100072 [2]中船重工七二五所海洋腐蚀与防护国防科技重点实验室,青岛266071

出　　处：《中国腐蚀与防护学报》2012年第1期44-47,共4页Journal of Chinese Society For Corrosion and Protection

摘　　要：采用电化学阻抗谱技术、失重法和扫描电镜分析技术(SEM)研究Al-Zn-In-Mg-Ga-Mn牺牲阳极在自腐蚀与7A52铝合金偶接两种条件下的溶解行为和活化性能。结果表明:偶连接的Al-Zn-In-Mg-Ga-Mn牺牲阳极有效地降低了7A52Al的腐蚀速率,牺牲阳极一直存在活性溶解,腐蚀均匀,腐蚀产物易脱落。自腐蚀的Al-Zn-In-Mg-Ga-Mn牺牲阳极发生局部腐蚀,表面溶解不均匀;表面腐蚀产物和氧化膜以及活性溶解点的减少阻滞了牺牲阳极溶解反应。Activation performance and dissolution behavior of Al-Zn-In-Mg-Ga-Mn sacrifice anode under condition of natural corrosion and coupled with 7A52 aluminum alloy was investigated by electrochemistry impedance spectrum technology,mass loss method and SEM analysis technology.The result showed：the corrosion rate of 7A52 which was protected by sacrificial anode was decreased at a certain extent.The sacrificial anode corrodes uniformity,and corrosion products fall off easily.Al-Zn-In-Mg-Ga-Mn sacrifice anode in natural corrosion occurs localized corrosion and dissolves non-uniform,which the active pots was covered by oxide film and corrosion products,and the corrosion reaction was prevented.

关 键 词：铝基牺牲阳极 海洋腐蚀防护 电化学阻抗 腐蚀速率 

分 类 号：TG174.41[金属学及工艺—金属表面处理]