N80S抗硫油管钢在含CO2、微量H2S及高浓度Cl^-腐蚀介质中的腐蚀行为

Corrosion Behavior of N8Os Anti-sulfide Tubing Steel in Carbon Dioxide,A Little Hydrogen Sulfide and High Chlorine Ion Environment

关键词:  N80S抗硫油管钢 CO2 H2S Cl^- 腐蚀产物膜

Key words:  N80S anti-sulfide tubing, Cl~-,H_2S,CO_2,corrosion product film

摘要:

用失重法、扫描电镜（SEM）、能谱分析（EDS）及X射线能谱（XRD）对N80S抗硫油管钢在CO2、微量H2S及高浓度Cl^-条件下的腐蚀破坏进行腐蚀实验研究，结果发现，在实验条件下，微量H2S的存在对反应系统影响较大；在膜的形成过程中硫化物腐蚀产物膜（FeS、FeS0.9）会优先形成，并进一步阻碍具有良好保护性的FeCO3腐蚀产物膜的形成；腐蚀产物膜疏松、平均腐蚀速率较大，且有轻度局部腐蚀发生。溶液中高浓度的Cl^-及材料中高含量的Cr元素会使N80S抗硫钢局部腐蚀倾向加大。

Abstract:

Corrosion behavior of N80S anti-sulfide tubing is studied in the environment of containing carbon dioxide, a little hydrogen sulfide and high chlorine ion concentration. The results show that H2S plays the major role in the reaction. FeS comes into being