摘要
在模拟的油田高温高压现场环境下研究了普通 Ｎ８０级油套管钢和含 ４％－５％Ｃｒ的 Ｎ８０油套管钢 ＣＯ２腐蚀产物膜结构和离子选择性特征．结果表明、普通 Ｎ８０油套管钢形成的 ＦｅＣＯ３腐蚀产物膜具有阴离子选择透过性、这种特征对基体保护性较差．丘容易诱发点蚀：含 ４％－５％Ｃｒ的 Ｎ８０油套管钢形成的 Ｃｒ（ＯＨ）３非晶态腐蚀产物膜具有阳离子选择透过性，它不仅可以显著降低腐蚀速率．而且可以抑制点蚀的发生。
In the simulating oilfield downhole corrosive environment with high temperature-high pressure, the structure characteristics and ion selectivity of the CO2 corrosion scale on general N80 steel and 4%-5%Cr N80 steel were studied. The experimental results indicated that the FeCO3 corrosion scale formed on the general N80 steel surface has anion-passing-selectivity, which could not protect matrix effectively and would enhance the formation of pitting, and the amorphous compound Cr(OH)(3) film formed on the 4%-5%Cr containing N80 steel surface has cation-passing-selectivity, which could not only reduce the corrosion rate but also prevent the formation of pitting.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第4期411-416,共6页
Acta Metallurgica Sinica
基金
国家重点基础研究发展规划项目 G19990650
中国石油天然气集团公司石油管力学和环境行为重点实验室基金项目资助~~
