| 刘雨薇,王振尧,吕旺燕,苏伟.模拟酸雨大气环境中Cl-浓度对镀锌钢腐蚀行为的影响[J].装备环境工程,2015,12(4):22-26,43. LIU Yu-wei,WANG Zhen-yao,LYU Wang-yan,SU Wei.Effects of Cl- Concentration on Corrosion Behavior of Hot-dip Galvanized Steel in Simulated Acid Rain Atmospheric Environment[J].Equipment Environmental Engineering,2015,12(4):22-26,43. |
| 模拟酸雨大气环境中Cl-浓度对镀锌钢腐蚀行为的影响 |
| Effects of Cl- Concentration on Corrosion Behavior of Hot-dip Galvanized Steel in Simulated Acid Rain Atmospheric Environment |
| 投稿时间：2015-05-06 修订日期：2015-08-15 |
| DOI：10.7643/issn.1672-9242.2015.04.005 |
| 中文关键词: 镀锌钢 模拟酸雨 电化学技术 大气腐蚀 |
| 英文关键词:hot-dip galvanized steel simulated acid rain electrochemical technique atmospheric corrosion |
| 基金项目:南网科技项目 （K-GD2014-0532） |
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| 中文摘要: |
| 目的 研究模拟酸雨环境中Cl-浓度对镀锌钢腐蚀行为的影响与作用机理。方法 以pH为3.05的模拟酸雨溶液作为空白溶液， 在每升空白溶液中分别加入0.01， 0.1和0.5 mol的NaCl， 浸泡3天和7天后取出试样， 进行形貌、 成分分析以及电化学分析。结果 浸泡后镀锌钢表面形成的腐蚀产物主要为NaZn4SO4Cl （OH） 6·6H2O。随着溶液中Cl-浓度的增加， 镀锌钢的腐蚀电位逐渐减小，腐蚀电流密度逐渐增大， 阻抗值逐渐减小。结论 通过不同时间的浸泡， 随着溶液中Cl-浓度的增加， 镀锌钢表面腐蚀产物对基体都有一定的保护作用， 但保护作用逐渐减小， 尤其在浸泡3天时的变化最明显。 |
| 英文摘要: |
| 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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