碳钢和镀锌钢在都江堰大气环境中的腐蚀行为研究  

Atmospheric Corrosion of Carbon Steel and Galvanized Steel in a Test Site at Dujiangyan City

作　　者：曾宪光[1,2] 郑兴文[2,3] 龚敏[1,3] 范金龙[1] 陈雪丹[1,3] 

机构地区：[1]四川理工学院材料与化学工程学院,自贡643000 [2]四川理工学院化学与制药工程学院,自贡643000 [3]四川理工学院材料腐蚀与防护四川省重点实验室,自贡643000

出　　处：《中国腐蚀与防护学报》2015年第3期271-278,共8页Journal of Chinese Society For Corrosion and Protection

基　　金：四川省科技厅国际合作项目(2011HH0018)资助

摘　　要：研究了碳钢和镀锌钢在都江堰市1个实验点4个微环境不同监测点1和3 a的大气腐蚀行为。对碳钢和镀锌钢在4个监测点的腐蚀形貌、腐蚀速率和腐蚀产物进行了测定和分析。结果表明,4个监测点的温度和相对湿度存在显著差异,导致碳钢和镀锌钢在4个监测点的腐蚀速率不同。随实验周期的增加,碳钢和镀锌钢的腐蚀速率减小。镀锌层能有效地减缓基体金属在大气环境中的腐蚀。而相对湿度和潮湿时间及相对湿度的波动是影响碳钢和镀锌钢腐蚀行为的重要因素。The atmospheric corrosion behavior of carbon steel and galvanized steel was investigated by exposure for one and three years respectively at four test spots with different local-environmental conditions in a test site at Dujiangyan city of Sichuan province, and then the corrosion morphology, corrosion rate and corrosion products of the two steels were carefully examined. The results showed that due to the significant differences in local temperature and relative humidity the corrosion rates of the two steels were different at the four test spots. In general, the corrosion rates of the two steels reduced with the increasing corrosion time. Zn coating could effectively protect the steel substrate, i.e. suppress the environmental corrosion in the test spots. The relative humidity,time of wetness and the fluctuation of relative humidity were important affecting factors on the corrosion of the steels.

关 键 词：大气腐蚀 微环境 碳钢 镀锌钢 

分 类 号：TG172.3[金属学及工艺—金属表面处理]