中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 14 No. 3 June 2004 |
（1. Department Applied Technology, Daqing Petroleum Institute, Daqing 163318, China;
2. Department of Environmental & Chemical Engineering,
Yanshan University, Qinhuangdao 066004, China;
3. Key Laboratory of Metastable Materials Science and Technology,
Yanshan University, Qinhuangdao 066004, China）
Abstract:The phenomenon, characteristics and influence factors of dechromisation of a Cu-Cr alloy in acid solutions containing Cl-were studied by means of metallographic observation, SEM/EDX, TEM and XRD. The mechanism of dechromisation of Cu-Cr alloy was discussed. The results show that dechromisation of the Cu-Cr alloy occurs at a certain temperature in solutions with H+and Cl-simultaneously. The corrosion starts initially at the interfaces between Cu phase
and Cr phase, then develops gradually into the centers of Cr phase. It is also revealed that dechromisation rates of the Cu-Cr alloy increase with increasing concentration of H+or Cl-, and temperature of the solutions.
Key words: Cu-Cr alloy; dechromisation; H+; Cl-
