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| Effects of Cl- Concentration on Corrosion Behavior of Hot-dip Galvanized Steel in Simulated Acid Rain Atmospheric Environment |
| Received:May 06, 2015 Revised:August 15, 2015 |
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| DOI：10.7643/issn.1672-9242.2015.04.005 |
| KeyWord:hot-dip galvanized steel simulated acid rain electrochemical technique atmospheric corrosion |
| Author | Institution |
| LIU Yu-wei |
Institute of Metal Research， Chinese Academy of Sciences， Shenyang ， China |
| WANG Zhen-yao |
Institute of Metal Research， Chinese Academy of Sciences， Shenyang ， China |
| LYU Wang-yan |
Electric Power Research Institute of Guangdong Power Grid Corporation， Guangzhou ， China |
| SU Wei |
Electric Power Research Institute of Guangdong Power Grid Corporation， Guangzhou ， China |
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| Abstract: |
| Objective To study the effects of Cl- Concentration on Corrosion Behavior of Hot-dip Galvanized Steel in simulated acid rain atmospheric environment. Methods The simulated acid rain solution (pH=3.05) was used as basic solution, then 0.01, 0.1, and 0.5 mol/L NaCl was respectively added. Samples were immersed in these solution and taken out respectively after 3 days and 7 days. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and electrochemical techniques were used to analyze the corroded samples. Results After immersion, the corrosion product component that formed on the surface of hot-dip galvanized steel is NaZn4SO4Cl(OH)6·6H2O. Along with the increase of the Cl- concentration, the corrosion potential of the galvanized steel was gradually decreased, the corrosion current was gradually increased and the impedance value was decreased. Conclusion With the increase of Cl- concentration, the protective effects of corrosion product formed on the surface of hot-dip galvanized steel was gradually reduced, especially after 3 days′ immersion. |
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