Enhanced pitting resistance through designing a high-strength 316L stainless steel with heterostructure
Jiansheng Li, Qingzhong Mao, Ming Chen, Wenbo Qin, Xianke Lu, Tong Liu, Dingshun She, Jiajie Kang, Gang Wang, Xiebin Zhu, Yusheng Li
Abstract
A high-strength 316L stainless steel with heterostructure (HS) was used to explore its corrosion properties in 3.5wt.% NaCl solution at 25 °C. Compared with a conventional coarse-grained (CG) sample, the HS sample with the characteristic of that the recrystallized grains (RGs) were surrounded by ultrafine/nano-structures (UFS/NSs) exhibited an enhanced pitting resistance. This was ascribed to interrupted propagation of the stable corrosion pits in RGs by the surrounded UFS/NSs. The results in current work may provide a new strategy to improve corrosion properties by heterostructural designing.
Topics & Concepts
Materials scienceCorrosionPitting corrosionMetallurgyHeterojunctionComposite materialOptoelectronicsHydrogen embrittlement and corrosion behaviors in metalsCorrosion Behavior and InhibitionHigh Temperature Alloys and Creep