Fe/有机涂层-Cu的电偶腐蚀特性  

GALVANIC CORROSION OF PAINTED IRON COUPLED WITH COPPER IN SODIUM CHLORIDE SOLUTION

作　　者：苏方腾[1] 蔡长寿[1] 张惠平 温国谋[1] 

机构地区：[1]中国科学院福建物质结构研究所,厦门361012

出　　处：《腐蚀科学与防护技术》1992年第4期258-265,共8页Corrosion Science and Protection Technology

基　　金：中科院腐蚀科学开放研究实验室项目;国家自然科学基金

摘　　要：测定了有机涂层的种类和厚度以及防锈颜料对Fc/有机涂层-Cu电偶腐蚀的影响。结果表明,涂层或涂层中活性颜料的防腐蚀性能愈强,电偶电流升至1微安/厘米~2所需的时间愈长。电偶的阴极对阳极的面积比值并不影响电偶电流密度。涂装酚醛涂层后,铁在氯化钠溶液中的阳极极化曲线和阴极极化曲线都呈现极限扩散电流的特征,这一电极行为决定了电偶的腐蚀特点。The influences of the composition and thickness of organic coatings on the galvanic corrosion of the painted iron coupled with copper were examined. An incubation period before the galvanic current density rose to 1 μA / cm^2was found to relate to the anti-corrosion performance of the organic coating with active pigment. The galvanic current density is independent of the area ratio of the cathode to the anode of the couple. The behaviour of the galvanic corrosion of the couple studied is elucidated based on the polarization measurements.

关 键 词：有机涂装 电偶腐蚀 颜料 缓蚀剂 

分 类 号：TG171[金属学及工艺—金属表面处理]