Fe-15Ce合金的氧化-硫化腐蚀  

OXIDIZING-SULFIDIZING CORROSION OF AN Fe-15Ce ALLOY

作　　者：付广艳[1] 牛焱[2] 

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：《腐蚀科学与防护技术》2001年第6期314-317,共4页Corrosion Science and Protection Technology

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

摘　　要：研究了Fe- 15Ce合金及纯Fe、纯Ce在 6 0 0和 70 0℃下H2 -H2 S -CO2 中的腐蚀行为 .Fe - 15Ce合金的腐蚀速度比纯Fe慢但比纯Ce快得多 .腐蚀后合金表面形成多层的腐蚀产物膜 ,最外层是基体金属的硫化物 (FeS) ,中间层为两种金属化合物组成的混合区 ,最内层为Ce在O和S作用下的内腐蚀区 .合金中 15mass%的Ce不足以阻止基体金属的硫化 。The oxidizing-sulfidizing corrosion of an Fe-15 mass%Ce alloy and of the two pure metals has been studied at 600℃ and 700℃.The scale formed on Fe-15Ce shows a multilayered structure,including an outermost layer of base metal sulfide (FeS),an intermediate complex layer composed of a mixture of compounds of the two metals and finally an innermost region of internal attack of Ce by both oxygen and sulfur.A cerium content of 15 mass% is insufficient to prevent the sulfidation of the base metal.These results as well as the scale microstructure are interpreted by taking into account the limited solubility of Ce in Fe and the presence of Ce-rich intermetallic compounds in the alloy examined.

关 键 词：双相合金 氧化 硫化 腐蚀 稀土钢 

分 类 号：TG172.82[金属学及工艺—金属表面处理]