X65钢在不同温度CO2酸性溶液中的腐蚀行为  

Corrosion Behavior of X65 Steel in CO_2 Acidic Solution at Different Temperature

作　　者：刘永丹[1,2] 刘海浪[2] 王宝健[2] 陈一胜[1] 

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃兰州730050 [2]江西理工大学材料与化学工程学院,江西赣州341000

出　　处：《机械工程材料》2009年第1期70-72,共3页Materials For Mechanical Engineering

摘　　要：将X65钢放在高压釜内于60～150℃、1MPa的CO2酸性溶液中进行72h腐蚀，用XRD、EPMA、SEM和失重法等方法分析了腐蚀产物的形貌、物相组成和腐蚀速率。结果表明：X65钢在60，90，120和150℃的腐蚀速率分别为10．97，3．70，8．37和18．97mm·a-1；60℃时在腐蚀表面不生成FeCO3保护膜，腐蚀较严重；90℃时生成细小致密的FeCO3保护膜，腐蚀较轻；120℃时生成细小松散的FeCO3保护膜，腐蚀较严重；而150℃时生成粗大不紧密的FeCO3保护膜，所以腐蚀最严重。X65 steel specimens were tested in an acidic solulion containing CO2 with a pressure of 1 MPa at 60 -150 ℃ for 72 h in an autoclave. XRD, EPMA, SEM and weight-loss methods were used to analyze the corrosion products and corrosion rates. The results showed that the corrosion rates at 60 ℃, 90 ℃, 120 ℃ and 150 ℃ were 10. 97, 3. 70, 8. 37 and 18. 97 mm · a- 1 respectively. Protective films of FeCO3 were not generated at 60 ℃ resulting in serious corrosion. Fine and compact protective fihns of FeCO2 were formed at 90 ℃ and reduced the corrosion rate markedly. The FeCOa films were relatively fine but scattered at 120 ℃ and were coarse and loose at 150 ℃ and thus increased the corrosion rate.

关 键 词：X65钢 C02腐蚀 保护膜 腐蚀速率 

分 类 号：TG142.41[一般工业技术—材料科学与工程] TG172.6[金属学及工艺—金属材料]