扫描电化学显微镜原位观察碳钢涂层缺陷处的交流腐蚀行为

公维炜, 杨丙坤, 陈云, 郝文魁, 王晓芳, 陈浩

In Situ SECM Observation of Corrosion Behavior of Carbon Steel at Defects of Epoxy Coating under AC Current Conditions

GONG Weiwei, YANG Bingkun, CHEN Yun, HAO Wenkui, WANG Xiaofang, CHEN Hao

表3 不同交流电流强度和浸泡时间涂层缺陷处的腐蚀坑深度

Table 3 Corrosion pit depth for samples soaked for different time at different AC current densities (μm)

AC current density Immersion time 5 h 10 h 24 h 0 A/m2 15.5 25.4 50.8 50 A/m2 78.8 115.2 143.2 100 A/m2 85.6 135.5 154.1 300 A/m2 92.7 153.1 238.4