Copper corrosion in hot and dry atmosphere environment in Turpan, China  

铜在中国吐鲁番干热大气环境下的腐蚀行为（英文）

作　　者：孔德成[1] 董超芳[1] 方月华[2] 肖葵[1] 郭春云 何刚 李晓刚[1] 

机构地区：[1]北京科技大学腐蚀与防护教育部重点实验室,腐蚀防护中心,北京100083 [2]新疆吐鲁番自然环境测试中心,吐鲁番838200

出　　处：《Transactions of Nonferrous Metals Society of China》2016年第6期1721-1728,共8页中国有色金属学报（英文版）

基　　金：Project(51222106)supported by the National Natural Science Foundation of China;Project(FRF-TP-14-011C1)supported by the Fundamental Research Funds for the Central Universities,China;Project(2014CB643300)supported by the National Basic Research Program of China

摘　　要：The atmospheric corrosion behavior of pure copper exposed for three years in Turpan, China, which is a typical hot and dry atmosphere environment, was investigated using mass-loss tests, morphology observations, composition analyses, and electrochemical techniques. The results indicated that the annual corrosion rate of pure copper was approximately 2.90 μm/a. An uneven distribution of corrosion products was observed by scanning electron microscopy; this uneven distribution was attributed to the dehydration process during wet–dry and cold–hot cycles, and the compositions mainly consisted of cuprite （Cu2O） and atacamite （Cu2Cl（OH）3）. Electrochemical measurements showed that deposits on copper improved its resistance to corrosion and the protectiveness decreased with increasing temperature. On the other hand, results obtained using the scanning vibrating electrode technique showed that the porous and uneven structure of the deposit layer generated a spatial separation of cathodic and anodic reaction sites, which accelerated the corrosion process in wet and rainy weather.采用失重测试、形貌观察、成分分析和电化学实验对放置在吐鲁番干热大气环境下3年的纯铜进行大气腐蚀研究。结果显示,平均失重速率为2.90μm/a,远低于处在海洋环境下的腐蚀速率;铜的大气腐蚀产物主要由Cu_2O和Cu_2Cl(OH)_3组成,而由于干湿和冷热循环,腐蚀产物分布不均匀;电化学实验表明,腐蚀产物的存在能阻止腐蚀的进一步发生,但是产物的不均匀分布会在一定程度上加速腐蚀的进程。

关 键 词：COPPER atmospheric corrosion composition analysis electrochemical technology 

分 类 号：TG172.3[金属学及工艺—金属表面处理]