Effects of microstructural evolution on the corrosion properties of AISI 420 martensitic stainless steel during cold rolling process

被引：40

作者：

Salahi, Salar ^{[1
]}

Kazemipour, Mostafa ^{[1
]}

Nasiri, Ali ^{[2
]}

机构：

[1] Mem Univ Newfoundland, Fac Engn & Appl Sci, St John, NF A1B 3X5, Canada

[2] Dalhousie Univ, Dept Mech Engn, Halifax, NS, Canada

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2021年 / 258卷

关键词：

Corrosion; AISI 420 stainless steel; Cold rolling; Plastic deformation; Particle fragmentation;

D O I：

10.1016/j.matchemphys.2020.123916

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, the impacts of plastic deformation induced by compressive stresses on the evolution of the microstructure and the resultant corrosion properties of AISI 420 martensitic stainless steel (MSS) are investigated. With multiple applications in downhole environments, AISI 420 martensitic stainless steel was chosen and cold rolling was implemented to develop preferentially textured samples of this alloy. The non-deformed samples of the base metal were cold-rolled to the deformation levels of 25% and 50%. The performed corrosion analysis herein confirmed a more stable passive layer and a higher corrosion resistance for the base metal, while the 25% and 50% rolled samples exhibited higher susceptibility to localized pitting corrosion. A detailed study of the corrosion morphology of all samples revealed the preferential pitting at the regions with a high fraction of fragmented carbides. As the deformation level increases, a higher fraction of fragmented precipitates forms in the microstructure, provoking the micro-galvanic coupling and deteriorating the corrosion resistance.

引用

页数：14