X-60管线钢在含H2S及高温高压CO2酸性溶液中的腐蚀特征  

Corrosion characteristics of X-60 pipeline steel in acid solution of H_2S and CO_2 under high temperature and high pressure

作　　者：周琦[1,2] 贾建刚[1,2] 赵红顺[1] 常春雷 张俊喜[1] 刘建军[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050 [2]兰州理工大学有色金属合金省部共建教育部重点实验室,甘肃兰州730050

出　　处：《金属热处理》2008年第5期91-94,共4页Heat Treatment of Metals

基　　金：甘肃省自然科学基金(3ZS062-B25-025)

摘　　要：采用失重法、SEM、XRD及电子探针微观分析等方法,研究了X-60管线钢在5种不同高温条件及2MPaCO2分压的饱和H2S的CO2酸性溶液中的腐蚀特征。结果表明,在90-210℃范围内,X-60管线钢发生了严重的CO2/H2S腐蚀,且伴有不同程度的点蚀或蚀坑群;随着温度的升高,X-60管线钢的腐蚀速率呈上升-下降-上升趋势,表面生成了以硫化铁为主的腐蚀产物膜;钢的显微组织会影响其腐蚀特征,在CO2/H2S腐蚀引起的点蚀与氢损伤的协同作用下,一定程度上形成了X-60管线钢表面独特的腐蚀特征。The corrosion characteristics of X-60 pipeline steel under five different high temperatures and in acid solution saturated with H2S at 2 MPa partial pressure of CO2 were investigated by SEM, XRD,weight loss method and electronprobe microanalysis. The results show that in the temperature ranges of 90 -210 ℃, serious CO2/H2S corrosion of X-60 pipeline steel occurs with pitting or pitting corrosion groups at different degrees. With the temperature increasing, the corrosion rate of X-60 pipeline steel shows the tendency of increase-decrease-increase, corrosion products-iron sulfide films are formed on the surfaces of the samples. The microstructure of the steel can affect the corrosion characteristics, the corrosion features on the surface of the X-60 pipeline steel are unique, and to a certain degree, it is the result of the correlaring effects of both hydrogen damage and pitting caused by CO2/H2S corrosion.

关 键 词：CO2/H2S腐蚀 高温高压 X-60钢 氢损伤 

分 类 号：TG172.3[金属学及工艺—金属表面处理]