J. Mater. Sci. Technol. ›› 2020, Vol. 36: 37-44.DOI: 10.1016/j.jmst.2019.06.011
• Research Article • Previous Articles Next Articles
Heng Chena, Zebang Hea, Lin Luab*()
Received:
2019-01-23
Revised:
2019-05-27
Accepted:
2019-06-24
Published:
2020-01-01
Online:
2020-02-11
Contact:
Lu Lin
Heng Chen, Zebang He, Lin Lu. Correlation of surface features with corrosion behaviors of interstitial free steel processed by temper rolling[J]. J. Mater. Sci. Technol., 2020, 36: 37-44.
Sample | TR-1 | TR-2 | TR-3 | TR-4 |
---|---|---|---|---|
Rolling force (kN) | 230 | 237 | 242 | 146 |
Table 1 Temper rolling forces imposed on the samples.
Sample | TR-1 | TR-2 | TR-3 | TR-4 |
---|---|---|---|---|
Rolling force (kN) | 230 | 237 | 242 | 146 |
Sample | TR-1 | TR-2 | TR-3 | TR-4 |
---|---|---|---|---|
Sa (μm) | 0.831 | 0.913 | 0.905 | 0.872 |
Sq (μm) | 1.018 | 1.109 | 1.094 | 1.062 |
Sp (μm) | 2.801 | 3.338 | 3.152 | 2.976 |
Sv (μm) | -3.089 | -3.365 | -3.079 | -3.704 |
Table 2 Roughness parameters of the IF steel samples.
Sample | TR-1 | TR-2 | TR-3 | TR-4 |
---|---|---|---|---|
Sa (μm) | 0.831 | 0.913 | 0.905 | 0.872 |
Sq (μm) | 1.018 | 1.109 | 1.094 | 1.062 |
Sp (μm) | 2.801 | 3.338 | 3.152 | 2.976 |
Sv (μm) | -3.089 | -3.365 | -3.079 | -3.704 |
Sample | TR-1 | TR-2 | TR-3 | TR-4 |
---|---|---|---|---|
Residual stress (MPa) | +18.4 ± 10 | -13.3 ± 8 | -6.3 ± 14 | -15.9 ± 13 |
Table 3 Residual stresses and errors on the surfaces of the IF steel samples.
Sample | TR-1 | TR-2 | TR-3 | TR-4 |
---|---|---|---|---|
Residual stress (MPa) | +18.4 ± 10 | -13.3 ± 8 | -6.3 ± 14 | -15.9 ± 13 |
Sample | TR-1 | TR-2 | TR-3 | TR-4 |
---|---|---|---|---|
Fraction | 0.482 | 0.756 | 0.532 | 0.472 |
Table 4 Fraction of IF steel grains with a GOS between 0.5° and 5°.
Sample | TR-1 | TR-2 | TR-3 | TR-4 |
---|---|---|---|---|
Fraction | 0.482 | 0.756 | 0.532 | 0.472 |
Fig. 5. Optical and corresponding 3D images of surface topographies of sample TR-2: (a, b) topographies before damp heat test; (c, d) topographies of corrosion spot after 96 h damp heat test with removing the corrosion products; (e, f) topographies after potentiodynamic polarization.
Sample | TR-1 | TR-2 | TR-3 | TR-4 |
---|---|---|---|---|
Ecorr (V vs. SCE) icorr (μA/cm2) | -0.747 45.52 | -0.756 16.28 | -0.735 14.31 | -0.760 12.49 |
Table 5 Electrochemical parameters of the IF steel samples in 3.5 wt% NaCl solution.
Sample | TR-1 | TR-2 | TR-3 | TR-4 |
---|---|---|---|---|
Ecorr (V vs. SCE) icorr (μA/cm2) | -0.747 45.52 | -0.756 16.28 | -0.735 14.31 | -0.760 12.49 |
Sample | TR-1 | TR-2 | TR-3 | TR-4 |
---|---|---|---|---|
8 h | 25 | 22 | 23 | 18 |
96 h | 82 | 41 | 38 | 34 |
Table 6 Numbers of corrosion spots at the 8th and 96th hour of the damp heat test.
Sample | TR-1 | TR-2 | TR-3 | TR-4 |
---|---|---|---|---|
8 h | 25 | 22 | 23 | 18 |
96 h | 82 | 41 | 38 | 34 |
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