Acta Metallurgica Sinica (English Letters) ›› 2019, Vol. 32 ›› Issue (4): 471-480.DOI: 10.1007/s40195-018-0777-6
Special Issue: 2019年腐蚀专辑-1
• Orginal Article • Previous Articles Next Articles
Yanhong Yan1,2, Hongwei Shi1(
), Jun Wang2(), Fuchun Liu1, En-Hou Han1
Received:2017-11-15
Revised:2018-04-18
Online:2019-04-10
Published:2019-04-19
Contact:
Shi Hongwei,Wang Jun
About author: Dr. Kun-Kun Deng was born in 1983 and was awarded Ph. D in Harbin University of Technology in 2011. After graduation, he worked in the College of Materials Science and Engineering, Taiyuan University of Technology. At the same time, he continued his research work on the design, fabrication and processing of advanced Mg-based material in. Now, he is the vice chairman of Youth Committee in Magnesium Alloy Branch of Chinese Materials Research Society. He was denoted as young academic pacemaker of Shanxi Province in 2018. He has held two projects of National Nature Science Foundation of China, one project of Specialized Research Fund for the Doctoral Program of Higher Education, one Project of International Cooperation in Shanxi and two projects of Natural Science Foundation of Shanxi. He has published more than 60 articles. The time cited is more than 840 (without selfcitations), and the H-index is 22. In addition, he has published one academic monograph and acquired eight Chinese patents. 
Yanhong Yan, Hongwei Shi, Jun Wang, Fuchun Liu, En-Hou Han. Corrosion Inhibition of Galvanized Steel in NaCI Solution by Tolytriazole[J]. Acta Metallurgica Sinica (English Letters), 2019, 32(4): 471-480.
Fig. 1 The chemical structure of methyl-1H-benzotriazole
Fig. 2 SEM images of surface and cross-sectional morphologies of the galvanized steel
Fig. 3 Photographs of the galvanized steel samples after a 1 h, b 4 h, c 24 h of immersion in 5 mM NaCl and after d 1 h, e 4 h, f 24 h in 5 mM NaCl containing 0.01 M TTA
Fig. 4 SEM images of the cross sections of the galvanized steel samples after 24 h of immersion in a 5 mM NaCl, b 5 mM NaCl containing 0.01 M TTA
Fig. 5 ATR-FTIR spectra of a TTA, b the galvanized steel sample after 24 h of immersion in 5 mM NaCl containing 0.01 M TTA
Fig. 6 Polarization curves of the galvanized steel samples immersed in a 5 mM NaCl, 5 mM NaCl solutions containing b 0.001 M TTA, c 0.005 M TTA, d 0.01 M TTA
| Concentration of TTA (M) | Ecorr (V) | Icorr (A/cm2) | Rp (Ω) | Corrosion inhibition efficiency, η (%) |
|---|---|---|---|---|
| 0 | -?0.88 | 3.86E-5 | 6.73E2 | - |
| 0.001 | -?1.08 | 1.71E-5 | 1.52E2 | 55.62 |
| 0.005 | -?1.05 | 1.96E-6 | 1.33E4 | 94.94 |
| 0.01 | -?1.03 | 7.09E-7 | 3.67E4 | 98.16 |
Table 1 Fitting results of polarization curves of the galvanized steel samples immersed in 5 mM NaCl and 5 mM NaCl solutions containing 0.001, 0.005 and 0.01 M TTA
| Concentration of TTA (M) | Ecorr (V) | Icorr (A/cm2) | Rp (Ω) | Corrosion inhibition efficiency, η (%) |
|---|---|---|---|---|
| 0 | -?0.88 | 3.86E-5 | 6.73E2 | - |
| 0.001 | -?1.08 | 1.71E-5 | 1.52E2 | 55.62 |
| 0.005 | -?1.05 | 1.96E-6 | 1.33E4 | 94.94 |
| 0.01 | -?1.03 | 7.09E-7 | 3.67E4 | 98.16 |
Fig. 7 Polarization curves of the galvanized steel samples immersed in 5 mM NaCl and 5 mM NaCl containing 0.01 M TTA at different immersion times
| Immersion time (h) | Ecorr (V) | Icorr (A/cm2) | Rp (Ω) |
|---|---|---|---|
| 5 mM NaCl | -?0.88 | 2.54E-5 | 1.03E3 |
| 0 | -?0.81 | 4.70E-7 | 5.55E4 |
| 4 | -?0.83 | 7.31E-7 | 3.57E4 |
| 24 | -?0.85 | 4.86E-7 | 5.37E4 |
| 72 | -?0.81 | 6.70E-7 | 3.89E4 |
| 120 | -?0.86 | 3.84E-7 | 6.80E4 |
Table 2 Fitting results of polarization curves of the galvanized steel sample immersed in 5 mM NaCl and 5 mM NaCl with 0.01 M TTA at different immersion time
| Immersion time (h) | Ecorr (V) | Icorr (A/cm2) | Rp (Ω) |
|---|---|---|---|
| 5 mM NaCl | -?0.88 | 2.54E-5 | 1.03E3 |
| 0 | -?0.81 | 4.70E-7 | 5.55E4 |
| 4 | -?0.83 | 7.31E-7 | 3.57E4 |
| 24 | -?0.85 | 4.86E-7 | 5.37E4 |
| 72 | -?0.81 | 6.70E-7 | 3.89E4 |
| 120 | -?0.86 | 3.84E-7 | 6.80E4 |
Fig. 8 EIS plots of the galvanized steel samples immersed in 5 mM NaCl and 5 mM NaCl solution containing 0.01 M TTA at different immersion times
Fig. 9 Equivalent electrical circuit used to fit EIS spectra for the galvanized steel sample during 120 h of immersion
| Time (h) | Rf (Ω cm2) | Qf (S/cm2 s-n) | n f | Rct (Ω cm2) | Qdl (S/cm2 s-n) | n dl |
|---|---|---|---|---|---|---|
| 0 | 8.27E2 | 3.30E-5 | 0.32 | 5.08E3 | 2.67E-7 | 1.00 |
| 4 | 9.83E2 | 2.74E-5 | 0.28 | 7.40E3 | 2.62E-7 | 0.99 |
| 24 | 1.45E3 | 2.62E-5 | 0.32 | 1.47E3 | 2.64E-7 | 0.96 |
| 72 | 1.09E4 | 3.93E-6 | 0.61 | 8.19E3 | 5.26E-5 | 0.81 |
| 120 | 1.40E4 | 6.90E-6 | 0.47 | 5.52E3 | 1.26E-4 | 0.92 |
Table 3 Circuit parameters of the galvanized steel sample immersed in 5 mM NaCl containing 0.01 M TTA at different immersion time
| Time (h) | Rf (Ω cm2) | Qf (S/cm2 s-n) | n f | Rct (Ω cm2) | Qdl (S/cm2 s-n) | n dl |
|---|---|---|---|---|---|---|
| 0 | 8.27E2 | 3.30E-5 | 0.32 | 5.08E3 | 2.67E-7 | 1.00 |
| 4 | 9.83E2 | 2.74E-5 | 0.28 | 7.40E3 | 2.62E-7 | 0.99 |
| 24 | 1.45E3 | 2.62E-5 | 0.32 | 1.47E3 | 2.64E-7 | 0.96 |
| 72 | 1.09E4 | 3.93E-6 | 0.61 | 8.19E3 | 5.26E-5 | 0.81 |
| 120 | 1.40E4 | 6.90E-6 | 0.47 | 5.52E3 | 1.26E-4 | 0.92 |
Fig. 10 SVET maps of the galvanized steel sample after 1, 4 and 24 h of immersion in 5 mM NaCl
Fig. 11 SVET maps of the galvanized steel sample after 1, 4 and 24 h of immersion in 5 mM NaCl containing 0.01 M TTA
Fig. 12 Curve fitting of the corrosion data for galvanized steel electrode according to Langmuir adsorption isotherm model
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