摘要
利用极化曲线、电化学阻抗测试、扫描电镜及X射线衍射等方法,研究了镀锌层在污水中的腐蚀行为。试验结果表明:镀锌层在流动污水中的腐蚀速率大于静止污水,有孔镀锌层的腐蚀速率大于无孔的镀锌层;随着时间的增加,镀锌层的极化电阻增大,腐蚀电流减小;腐蚀产物表面是白色锌的氧化物,表层有很小的腐蚀坑。
The corrosion behaviors of hot-dip galvanizing coating were studied by using polarization curve technique, electrochemical impedance spectroscopy （EIS）, scanning electron microscopy （SEM） and X-ray diffraction （XRD）. The corrosion medium was the sewage collected from the city of Zunyi. The corrosion rate of hot-dip galvanizing coating in the flowing sewage was faster than that in the static sewage. The corrosion rate of hot-dip galvanizing coating with a hole was faster than that without a hole. When the time was prolonged, the polarization resistance increased and the corrosion current decreased. There were some white oxides of zinc and some corrosion pits in the surface corrosion products.
出处
《腐蚀与防护》
CAS
北大核心
2006年第8期379-381,403,共4页
Corrosion & Protection
基金
贵州省教育厅自然科学基金重点资助项目(黔教科2005118)
关键词
热浸锌
污水
腐蚀
交流阻抗
极化曲线
Hot-dip galvanizing
Sewage
Corrosion
Electrochemical impedance spectroscopy
Polarization curve
