发电机空芯铜导线腐蚀速率电化学试验研究  

Elechemical Research on the Effects of pH and Dissolved Oxygen on Corrosion Rate of Hollow Strands of Water-Cooled Generators

作　　者：李俊菀[1] 曹杰玉[1] 宋敬霞[1] 王红卫 汪思华 

机构地区：[1]西安热工研究院有限公司,陕西西安710032 [2]华电章丘发电有限公司,山东章丘250216

出　　处：《中国电力》2014年第7期12-15,共4页Electric Power

基　　金：中国华电集团公司科技项目(CHDKJ12-01-37)~~

摘　　要：采用电化学测试方法,对发电机内冷水模拟工况和现场运行工况下铜腐蚀速率进行测量,研究内冷水pH值和溶解氧对发电机空芯铜导线腐蚀速率的影响规律。研究结果表明,铜腐蚀速率随内冷水pH值的提高而降低,内冷水最佳pH值为8.5左右;贫氧工况更有利于发电机铜线棒的整体腐蚀防护,当pH值为8.5左右,且铜表面形成具有保护性的氧化膜时,富氧工况也能够满足发电机铜线棒的安全运行。The corrosion rates of hollow strands under different simulated and onsite operation conditions were obtained by electrochemical test method in order to investigate the effects of pH and dissolved oxygen content on corrosion rate of hollow strands of water-cooled generators.Results showed that copper corrosion rate reduced with the increase of pH and the optimal pH value was around 8.5;Low-oxygen condition was more advantageous than rich-oxygen condition with regard to overall corrosion protection of copper bars.Rich-oxygen condition could also guarantee the safe operation of copper bars when the pH value was around 8.5 and a protective oxidation film had existed on the copper surface.

关 键 词：发电机 空芯铜导线 腐蚀 电化学 内冷水pH值 溶解氧 

分 类 号：TM31[电气工程—电机]