Corrosion Behaviour of AISI 304 Austenitic Stainless Steel Fabricated by Equal-Channel Angular Pressing
In this essay, the effects of grain refinement on corrosion behavior and hardness of equal-channel-angular-pressed (ECAPed) AISI 304 austenitic SS were studied. Finer grains with average size of 5μm in the specimen were obtained after four ECAPed passes compared with as-received one with grain size in range of 55μm Strain-induced grain refinement process can increase grain boundary and dislocation. Thus, the corrosion resistance of ECAPed AISI 304 austenitic SS would be improved.The refined microstructure achieves more positive open circuit potential (OCP) and lower corrosion current density in polarization corrosion tests.Through this process, austenitic stainless steel with better performance in corrosion resistance can be gained.
Jianmin Zeng, Taosen Li, Shaojian Ma, Zhengyi Jiang and Daoguo Yang
G. X. Chen et al., "Corrosion Behaviour of AISI 304 Austenitic Stainless Steel Fabricated by Equal-Channel Angular Pressing", Advanced Materials Research, Vols. 194-196, pp. 411-415, 2011