Journal of Inorganic Materials ›› 2017, Vol. 32 ›› Issue (12): 1257-1263.DOI: 10.15541/jim20160699
• Orginal Article • Previous Articles Next Articles
JIA Ying-Kun1,2, CHEN Pei1, ZHANG Qing-Hong1, SUN Jing2
Received:
2016-12-27
Revised:
2017-07-18
Published:
2017-12-20
Online:
2017-11-21
CLC Number:
JIA Ying-Kun, CHEN Pei, ZHANG Qing-Hong, SUN Jing. Thermal Reduced Graphene Oxide/Polyimide Nanocomposite Coating: Fabrication and Anticorrosive Property[J]. Journal of Inorganic Materials, 2017, 32(12): 1257-1263.
Samples | Rs/Ω | CPEdl-T/F | CPEdl-P/F | Rc/Ω |
---|---|---|---|---|
Pure PI | 1279 | 2.7060×10-6 | 0.7721 | 1.6081×105 |
TRGO0.1/PI | 1290 | 1.6952×10-6 | 0.6325 | 5.6110×105 |
TRGO0.2/PI | 1064 | 6.2072×10-7 | 0.7235 | 9.6912×105 |
TRGO0.3/PI | 1136 | 6.0883×10-7 | 0.7442 | 1.3176×106 |
TRGO0.4/PI | 1249 | 2.3677×10-6 | 0.7022 | 3.6245×105 |
TRGO0.5/PI | 1002 | 3.9181×10-6 | 0.6605 | 3.0603×105 |
Table 1 Fitting results for pure PI and TRGO/PI coatings
Samples | Rs/Ω | CPEdl-T/F | CPEdl-P/F | Rc/Ω |
---|---|---|---|---|
Pure PI | 1279 | 2.7060×10-6 | 0.7721 | 1.6081×105 |
TRGO0.1/PI | 1290 | 1.6952×10-6 | 0.6325 | 5.6110×105 |
TRGO0.2/PI | 1064 | 6.2072×10-7 | 0.7235 | 9.6912×105 |
TRGO0.3/PI | 1136 | 6.0883×10-7 | 0.7442 | 1.3176×106 |
TRGO0.4/PI | 1249 | 2.3677×10-6 | 0.7022 | 3.6245×105 |
TRGO0.5/PI | 1002 | 3.9181×10-6 | 0.6605 | 3.0603×105 |
Sample | Ecorr/V | Icorr/(A·cm-1) | ba/(mV·dec-1) | bc/(mV·dec-1) | Rp/(kΩ·cm2) | Thickness/μm | PEF/% |
---|---|---|---|---|---|---|---|
Bare steel | -0.53 | 1.319×10-4 | 11 | 4423 | 0.744 | - | - |
Pure PI | -0.40 | 1.490×10-6 | 1408 | 5960 | 36.931 | 1.30 | 98.87 |
TRGO0.1/PI | -0.31 | 8.513×10-7 | 4312 | 5946 | 49.785 | 1.30 | 99.35 |
TRGO0.2/PI | -0.28 | 6.199×10-7 | 1145 | 7123 | 108.823 | 1.30 | 99.53 |
TRGO0.3/PI | -0.24 | 4.616×10-7 | 3036 | 8532 | 158.105 | 1.30 | 99.65 |
TRGO0.4/PI | -0.34 | 5.865×10-7 | 2800 | 5227 | 96.969 | 1.30 | 99.56 |
TRGO0.5/PI | -0.36 | 1.070×10-6 | 3463 | 5388 | 44.839 | 1.30 | 99.19 |
Table 2 Corrosion parameters of bare 304SS, pure PI, TRGO/PI-coated 304SS electrodes immersed in 3.5 wt% NaCl solution after 6 h
Sample | Ecorr/V | Icorr/(A·cm-1) | ba/(mV·dec-1) | bc/(mV·dec-1) | Rp/(kΩ·cm2) | Thickness/μm | PEF/% |
---|---|---|---|---|---|---|---|
Bare steel | -0.53 | 1.319×10-4 | 11 | 4423 | 0.744 | - | - |
Pure PI | -0.40 | 1.490×10-6 | 1408 | 5960 | 36.931 | 1.30 | 98.87 |
TRGO0.1/PI | -0.31 | 8.513×10-7 | 4312 | 5946 | 49.785 | 1.30 | 99.35 |
TRGO0.2/PI | -0.28 | 6.199×10-7 | 1145 | 7123 | 108.823 | 1.30 | 99.53 |
TRGO0.3/PI | -0.24 | 4.616×10-7 | 3036 | 8532 | 158.105 | 1.30 | 99.65 |
TRGO0.4/PI | -0.34 | 5.865×10-7 | 2800 | 5227 | 96.969 | 1.30 | 99.56 |
TRGO0.5/PI | -0.36 | 1.070×10-6 | 3463 | 5388 | 44.839 | 1.30 | 99.19 |
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