纯Ni和Ni基合金在ZnCl_2-KCl盐膜下的腐蚀  

Corrosion of Pure Ni and Two Ni-Based Alloys in Presence of ZnCl_2-KCl Salt Deposit

作　　者：李远士[1] 王富岗[1] 朱焱[2] 吴维 

机构地区：[1]大连理工大学材料工程系,辽宁大连116024 [2]中国科学院金属研究所,辽宁沈阳110016

出　　处：《稀有金属材料与工程》2001年第5期376-379,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金资助项目 (5 972 5 10 1;5 98710 5 0 )

摘　　要：考察了表面涂有 Zn Cl2 - KCl盐膜的纯 Ni和 M38G,GH86 4两种 Ni基合金在 45 0℃纯氧气氛中的耐蚀性。结果表明 :3种材料均发生了加速性腐蚀 ,形成的表面产物膜十分疏松并与基体的粘附性较差 ;合金中较高的 Cr含量并没有提供良好的保护性 ,其腐蚀速度高于纯 Ni。分析了 Ni O与 Cr2 O3氧化膜在该环境中具有不同热力学稳定性的原因 。The corrosion behaviors of pure Ni and two Ni based alloys were examined beneath ZnCl 2 KCl salt deposit in pure oxygen environment at 450℃. An accelerated corrosion was observed in all of the three materials and the corrosion rates of the alloys were always higher than that of pure nickel. The corrosion products were rather porous and too poor adherence to the matrix to protect. The different corrosion resistance to environment for NiO and Cr 2O 3 films was discussed based on thermodynamic stability of the protective oxide films.

关 键 词：ZnCl2-KCl盐膜 腐蚀 镍基合金 纯镍 

分 类 号：TG172.62[金属学及工艺—金属表面处理] TG146.15[金属学及工艺—金属学]