| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1526581 | Materials Chemistry and Physics | 2009 | 5 Pages |
Abstract
Metastable pitting and stable pitting behaviors of two carbon steels in 0.05 M Na3PO4 + 0.03 M Na2B4O7 + 0.03 M Na2SO4 solution with 0.05 M NaCl or without NaCl (pH = 9.4) were studied by polarization measurements, current fluctuation measurements, EIS tests and analysis of Mott–Schottky plots. Compared with A3 steel, 16Mn steel shows higher passive film impedance and lower pitting susceptibility, which is characterized by higher pitting breakdown potential Eb, metastable pitting potential Em and flat band potential Ufb values, and lower electron concentration in the passive film. When the potential is above Em, diffusion tails occur on the resistance plots, indicating the beginning of local damage to the surface.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Yuming Tang, Xuhui Zhao, Jianpeng Mao, Yu Zuo,