镀锌层破损输电杆塔用镀锌钢在干湿交替作用下的腐蚀行为  

Corrosion Behavior of Galvanized Steel for Power Transmission Tower with Breakage of Zinc Coating in Polluted Environment

作　　者：原徐杰[1,2] 张俊喜[1] 张世明[1] 谈天[1] 

机构地区：[1]上海电力学院上海高校电厂腐蚀防护与应用电化学重点实验室上海200090 [2]上海中挪海事技术有限公司上海201417

出　　处：《中国腐蚀与防护学报》2013年第5期395-399,共5页Journal of Chinese Society For Corrosion and Protection

基　　金：上海市教委科研创新重点项目(12ZZ170)资助

摘　　要：采用自制大气腐蚀模拟试实验装置,并结合电化学阻抗及开路电位测试技术,研究了在干湿交替作用下,不同破损面积的输电杆塔用镀锌钢在NaCl和NaHSO3腐蚀介质共同污染下的腐蚀行为。结果表明,随着破损面积以及暴露时间的增加,电极的开路电位逐渐正移,同时电极的腐蚀速率也会随着破损面积的增加而增加,不同破损面积的样品的腐蚀速率在初期随暴露时间的增加而增加,后期逐渐减小。The corrosion behaviors of galvanized steel for power transmission tower with local breakage of zinc coating were investigated by using EIS and open circuit potential （OCP） measurements in NaCl and NaHSO3 polluted atmosphere. The results showed that the OCP of the electrode shifted to positive direction gradually as the broken area and exposure time increased. With the increase of broken area of zinc coating, the corrosion rate of galvanized steel increased gradually and more and more close to that of Fe.

关 键 词：镀锌钢 破损 干湿交替 电化学阻抗谱 

分 类 号：TG172.3[金属学及工艺—金属表面处理]