Cu-Cr合金在H_2-H_2S混合气中的腐蚀行为  

Corrosion of Cu-Cr alloys in H_2-H_2S mixture

作　　者：付广艳[1] 牛焱[2] 吴维 

机构地区：[1]沈阳化工学院机械工程系,沈阳110021 [2]中国科学院金属研究所金属腐蚀与防护国家重点实验室,沈阳110016

出　　处：《中国有色金属学报》2001年第4期562-566,共5页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金( 5 972 5 10 1和 5 98710 5 0 );辽宁省教委( 2 0 0 110 0 2 )资助项目

摘　　要：研究了Cu Cr合金及纯铜、纯铬在 5 0 0～ 60 0℃ ,硫分压为 10 -5Pa时的硫化腐蚀。两种Cu Cr合金的腐蚀速度均介于两种纯金属之间 ,并随温度的升高而增大 ,但在两种Cu Cr合金的表面均形成了复杂的腐蚀产物膜 ,外层为Cu2 S层 ,有时不连续甚至剥落 ,中间层为二元Cu Cr硫化物CuCrS2 ,内层为二元Cu Cr硫化物Cu Cr2 S4和CrS的混合物 ,有时也包含未被腐蚀的金属铬颗粒。在腐蚀区以下的合金基体中没有铬的贫化现象发生。The corrosions of the Cu Cr alloys and pure Cu and Cr were studied at 500～600?℃ in H 2 H 2S mixture with p s=10 -5 ?Pa. The corrosion rates of the two Cu Cr alloys under the same condition were between those of the two pure metals and they were increased with temperature. The complex scales form on the two alloys. It contains an external Cu 2S layer, which became discontinuous or even disappeared, an intermediate layer of the double Cu Cr sulfide CuCrS 2 and an innermost layer, which generally consisted of a mixture of the double Cu Cr sulfide CuCr 2S 4 with the chromium sulfide CrS and commonly contained unsulfidized chromium metal particles. No chromium depletion is developed in the alloys beneath the corrosion region. The peculiar scales are attributed to the special two phase nature of alloys.

关 键 词：铜-铬合金 腐蚀行为 腐蚀层组织 形成机制 氢气 硫化腐蚀 真空触头材料 铜合金 

分 类 号：TM503.5[电气工程—电器] TG172.33[金属学及工艺—金属表面处理]