论文部分内容阅读
通过挂片失重法研究了ＣＯ２分压对Ｎ８０钢在高矿化度介质中的腐蚀规律，结果表明ＣＯ2在腐蚀过程中起着催化作用，其中，腐蚀速度（ｖｃ）和ＣＯ２分压满足ｌｇｖｃ＝１．００５８×ｐｃｏ２－０．４０９５；结合扫描电镜对表面形貌的观察及表面腐蚀产物的Ｘ射线衍射分析，发现随着ＣＯ２分压的增大，不仅腐蚀速度增大，而且不均匀腐蚀的程度增大同时，在含ＣＯ2的高矿化度介质中有轻微的ＣａＣＯ３结垢．
The corrosion mechanism of N80 steel in high mineralization medium was studied by coupon weight loss method. The results show that CO2 plays a catalytic role in the corrosion process. Among them, the corrosion rate (vc) and CO2 partial pressure satisfy lgvc = 1.0058 × pco2-0.4095. Combined with SEM observation of the surface topography and X-ray diffraction analysis of the surface corrosion products, it was found that with the increase of CO2 partial pressure, not only the corrosion rate but also the non-uniform corrosion At the same time, there is a slight amount of CaCO3 scaling in high-salinity media containing CO2.