Transactions of Nonferrous Metals Society of China
JOURNAL OF RAILWAY SCIENCE AND ENGINEERING
|Vol. 16 No. 1 February 2006|
（1. Department of Applied Technology, Daqing Petroleum Institute, Daqing 163318, China;
2. Analysis and Measure Center, Jilin Normal University, Siping 136000, China;
3. College of Electric Engineering, Yanshan University, Qinhuangdao 066004, China）
Abstract:The corrosion behavior of a CuCrNiAl alloy in HCl solutions was studied by means of metallograph, XRD, SEM/EDX and TEM methods. The results show that in low concentration of HCl solutions, Cu of CuCrNiAl alloy is more easily subject to corrsion than Cr; the dechromisation of the CuCrNiAl alloy occurs at a certain concentration of HCl solutions, at the same time Al of CuCrNiAl alloy is subject to corrosion also. The dechromisation corrosion occurs initially at the interface between Cr phase and Cu phase, then it gradually extends Cr phase until Cr phase is dissolved completely. It is also revealed that the tendency of dechromisaion of the CuCrNiAl alloy increases with the increase in concentration and temperature of HCl solutions.
Key words: CuCrNiAl alloy; HCl solutions; corrosion behavior