Research Progress of Corrosion Resistance for Nano/Ultrafine-grained Austenite Stainless Steel

The grain refinement of austenite stainless steel is widely studied due to its enhanced mechanical properties, such as high strength, high hardness and good wear resistance. Meanwhile, the effect of nanocrystallines (NC) and ultrafine grains (UFG) on corrosion performance also attracts more attention. This paper focuses its attention mainly on the corrosion mechanism of the stainless steel with NC/UFG microstructure. The latest developments of corrosion mechanisms of the refined austenite stainless steels are introduced involving the microstructures of grain size, phase composition and twin.