3种有色金属在沈阳地区的大气腐蚀规律

通过Cu，Zn，A1在沈阳地区的大气暴露实验，总结了3种金属的大气腐蚀规律，并讨论了干沉降和湿沉降对金属的大气腐蚀影响。结果表明：Cu，Zn的腐蚀深度与暴露时间呈线性关系；A1的腐蚀深度与暴露时间呈幂指数关系。利用X射线衍射仪和扫描电镜对腐蚀产物的结构和形貌进行分析，并讨论了3种金属大气腐蚀产物的形成过程。

Atmospheric corrosion law of three non-ferrous metals in Shenyang area

The atmospheric corrosion of copper, zinc and aluminium in Shenyang area under open and shelter exposure for 8 a was reported. The atmospheric corrosion laws of three metals were described. The order of corrosion rates of three metals under open and shelter exposure from high to low is zinc, copper and aluminium. A classification of atmospheric corrosion aggressivity in Shenyang area based both on environmental data and corrosion rate measurements was made according to ISO9223. The morphologies and microstructures of corrosion products of three metals exposed for 8 a were investigated through XRD and SEM, and the process of forming corrosion products was discussed. It is indicated that the pollution of sulphur dioxide is of decisive importance in the corrosion attack.