油气田用马氏体不锈钢腐蚀性能研究现状与进展

张雄斌, 党恩, 于晓婧, 汤玉斐, 赵康

Research Status and Progress on Corrosion Performance of Super Martensitic Stainless Steel for Oil and Gas Fields

ZHANG Xiongbin, DANG En, YU Xiaojing, TANG Yufei, ZHAO Kang

表1 马氏体不锈钢耐蚀性能改善措施的优缺点

Table 1 Advantages and disadvantages of improvement measures of corrosion resistance of martensitic steels

Improvement measures Advantages Disadvantages Optimize Alloy composition Long-term and effective, and simple It is easy to form intergranular inclusion segregation and induce pitting corrosion Regulate microstructure Obvious effect, stable It is difficult to regulate the microstructure in a directional manner and the uncertainty is high Adopt anti-corrosive coating Simple, wide range of anti-corrosion The preparation cost is high, and the bonding between the coating and the substrate is insufficient Add Corrosion inhibitors Inexpensive, efficient and simple The dosage is large, which is easy to cause pitting or perforation in small parts that are not completely passivated