摘要
运用所研制的复合系统电位-pH平衡图,结合表面分析方法,对一种新试制的马氏体不锈钢的钝化性能进行了研究。结果表明:耐蚀性合金元素在该钢的表面膜中发生了富集,其富集情况可用数学分析式表示。测试结果显示了该钢种较好的钝化性能,可作为油田采油泵凡尔球用材。
Potential-pH equilibrium diagram combined with ESCA and AES was used to study the anodic passivaty of a new developed martensitic stainless steel in solution containing Cl^-. The results showed that the chromium is rich in surface of passive film of the steel and the rich degree can be expressed by a mathematical equation. The experiment carryed out in specific condition verified that this steel has better passivaty and is suitable for Backpressure valves in oil well.
关键词
马氏体不锈钢
钝化
球阀
Martensitic stainless steels
Passivation
Ball valves
