共 25 条
Effect of Chloride on Semiconducting Properties of Passive Films Formed on Supermartensitic Stainless Steel in NaHCO3 Solution
被引:25
作者:
Han Xiao-chen
[1
]
Li Jun
[1
]
Zhao Kun-yu
[1
]
Zhang Wei
[2
]
Su Jie
[3
]
机构:
[1] Kunming Univ Sci & Technol, Coll Mat Sci & Engn, Kunming 650093, Yunnan, Peoples R China
[2] CISRI Qingdao Marine Corros Inst, Qingdao 266071, Shandong, Peoples R China
[3] Cent Iron & Steel Res Inst, Inst Struct Mat, Beijing 100081, Peoples R China
关键词:
supermartensitic stainless steel;
passive film;
capacitance measurement;
semiconducting property;
chloride ion;
BORATE BUFFER;
304-STAINLESS-STEEL;
POTENTIALS;
BREAKDOWN;
IRON;
XPS;
FE;
D O I:
10.1016/S1006-706X(13)60101-6
中图分类号:
TF [冶金工业];
学科分类号:
0806 ;
摘要:
The effects of chloride ion on the electrochemical behavior and the semiconducting properties of the passive film on supermartensitic stainless steel in 0.5 mol/L NaHCO3 solution were investigated using potentiodynamic polarization, the potentiostatic current transients and Mott-Schottky analysis. The results indicated that chloride ion narrowed passivation region and improved pitting susceptibility. The steady state current densities were independent of film-formed potentials, which was in good agreement with the assumption of the point defect model (PDM). The capacitance results showed the fact that the passive films had a multilayer character. The defect density decreased with increasing passive film formation potential. The chloride ion induced changes of the acceptor densities and donor densities of the passive films.
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页码:74 / 79
页数:6
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