CuNiCrAl合金在H_2SO_4溶液中的腐蚀行为  

Corrosion Behavior of CuNiCrAl Alloy in H_2SO_4 Solutions

作　　者：刘建华[1] 张瑞军[1] 杨景茹[2] 孙奇娜 

机构地区：[1]燕山大学亚 稳材料制备技术与科学国家重点实验室,河北秦皇岛066004 [2]河北建材职业技术学院,河北秦皇岛066004 [3]中国环境干部管理学院,河北秦皇岛066004

出　　处：《稀有金属材料与工程》2007年第A03期295-298,共4页Rare Metal Materials and Engineering

基　　金：黑龙江省教育厅科学技术研究项目(11511020)资助

摘　　要：借助金相、X射线衍射(XRD)、扫描电镜(SEM/EDX)及X射线荧光光谱仪研究了CuNiCrAl合金在H_2SO_4溶液中的腐蚀行为。结果表明:CuNiCrAl合金在低温H_2SO_4溶液中,合金中的Cu相较易腐蚀;当H_2SO_4溶液浓度和温度达到一定值时,合金出现脱铬腐蚀现象,溶液的浓度和温度越高,脱铬倾向越大,且溶液添加NaCl能促进合金的脱铬腐蚀,还对CuNiCrAl合金的脱铬机制进行了探讨。The corrosion behavior of the CuNiCrAl alloy in H2SO4 solutions were studied by metallograph, XRD, SEM/EDS and X-ray fluorescence spectrometer. It was found that Cu of CuNiCrAl alloy in low temperature H2SO4 solutions is easier subject to corrosion than Cr; and dechromisation of the CuNiCrAl alloy occurs at a certain concentration and temperature of H2SO4 solutions, and the tendency of dechromisaion of the CuNiCrAl alloy increases with increasing concentration and temperature of H2SO4 solutions. As a result, the addition of NaCl can accelerate the dechromisaion of the CuNiCrAl alloy, and the mechanism of dechromisaion for CuNiCrAl alloy were also discussed.

关 键 词：CuNiCrAl合金 H2SO4溶液 脱铬腐蚀 

分 类 号：TG172[金属学及工艺—金属表面处理]