材料期刊网

Passivation behavior, corrosion kinetics and film formation mechanism of Ti(3)AlC(2) in 1 M NaOH and 1 M H(2)SO(4) solutions were investigated by linear potential scan, electrochemical impedance spectroscopy, cyclic voltammetry, SEM and XPS. The corrosion resistance mainly depended on the formation of passivating films on Ti(3)AlC(2) in 1 M NaOH and 1 M H(2)SO(4), which led to different corrosion processes. Ti(3)AlC(2) displayed good corrosion resistance in NaOH due to the formation of dense and protective Ti oxides as the passivating film. However, it exhibited poor corrosion resistance in H(2)SO(4) which attributed to the formation of permeable Ti sub-oxides as the pseudo-passivating film. (C) 2010 Elsevier Ltd. All rights reserved.