中文摘要：

采用极化曲线测试和交流阻抗技术研究了Galvalume镀层钢在青岛海域海水中的耐蚀性能,利用电子扫描电镜对镀层表面的腐蚀产物形貌进行了分析,详细探讨了海水温度和溶解氧浓度对Galvalume镀层钢电化学腐蚀行为的影响。结果表明：温度升高,破坏了保护性腐蚀产物膜在镀层表面的吸附,促进了阳极活化反应过程。低浓度的溶解氧抑制了阴极反应,镀层的耐蚀性能提高。

英文摘要：

The corrosion resistance of Galvalume coated steel in Qingdao seawater was investigated by polarization curves and EIS methods. The morphology of corrosion products absorbed on the coating was analyzed by scanning electron microscopy （SEM）, the effects of temperature and dissolved 02 concentration on electrochemical corrosion behavior of Galvalume coated steel were studied in details. The results show that the protective corrosion product film absorbed on the coating is damaged and the anodic reaction is activated with the increase of temperature. The cathodic reaction is inhibited un- der low concentration of dissolved 02 and the corrosion resistance of the galvalume coating is im- proved.