Effect of Thermo-Mechanical Processing on the Corrosion Behavior of Fe−30Mn−5Al−0.5C TWIP Steel

Applied Sciences

卷:10

Juan Bosch¹  DavidM. Bastidas¹  Ulises Martin¹  Jacob Ress¹ 

[1] National Center for Education and Research on Corrosion and Materials Performance, NCERCAMP-UA, Department of Chemical, Biomolecular, and Corrosion Engineering, The University of Akron, 302 E Buchtel Ave, Akron, OH 44325-3906, USA;

关键词: thermo-mechanical processing;    dislocation glide;    TWIP steel;    corrosion;    cyclic potentiodynamic polarization;    XPS;   

DOI  :  10.3390/app10249104

来源: DOAJ

【 摘 要 】

Electrochemical corrosion of thermo-mechanically processed (TMP) and recrystallized Fe−30Mn−5Al−0.5C twinning-induced plasticity (TWIP) steels containing 30 wt.% Mn was studied in a 1.0 wt.% NaCl electrolyte solution. The alkaline nature of the corrosion products containing manganese oxide (MnO) increases the dissolution kinetics of the TWIP steel in acid media, obtaining Mn²⁺ cations in solution, and producing the hydrogen evolution reaction (HER). X-ray photoelectron spectroscopy (XPS) surface analysis revealed an increased Al₂O₃ content of 91% in the passive layer of the recrystallized TWIP steel specimen, while in contrast only a 43% Al₂O₃ was found on the TMP specimen. Additionally, the chemical composition of the surface oxide layer as well as the TWIP alloy microstructure was analyzed by optical microscopy (OM) and scanning electron microscopy (SEM). The results indicate an enhanced corrosion attack for the TMP high-Mn TWIP steel.

【 授权许可】

Unknown