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张杰,李晓龙,张鑫,王翠.镀层合金与碳钢基底的电偶腐蚀研究[J].广西科学院学报,2015,31(3):187-191. [点击复制]
- ZHANG Jie,LI Xiao-long,ZHANG Xin,WANG Cui.Galvanic Corrosion Study of Surface Coating and Steel Substrate[J].Journal of Guangxi Academy of Sciences,2015,31(3):187-191. [点击复制]
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| 镀层合金与碳钢基底的电偶腐蚀研究 |
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张杰1, 李晓龙1,2, 张鑫1,2, 王翠1,3
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| (1.中国科学院海洋研究所, 山东青岛 266071;2.中国科学院大学, 北京 100049;3.重庆大学化学化工学院, 重庆 400044) |
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| 摘要: |
| [目的]为寻求钢基底最佳抑制电偶腐蚀的热浸镀层材料,研究2种镀层合金与碳钢组成的电偶是否发生危害极大的极性逆转现象。[方法]选择Zn-55% Al-1.6% Si合金和Zn-5% Al-0.2% RE合金,分别与碳钢组成耦合电极,测试其在天然海水及不同浓度Cl-介质中的电偶电流等。[结果]海水体系以及Cl-浓度为0.005%,0.01%,0.5%体系中,2种镀层合金与碳钢组成的电偶均未出现极性逆转现象。对于同一种镀层合金与碳钢组成电偶,其偶合电流在不同浓度的Cl-中电流值不同,随着Cl-浓度的增加,其偶合电流也增加。[结论]钢基底热浸镀Zn-55% Al-1.6% Si合金或Zn-5% Al-0.2% RE可以有效抑制电偶腐蚀。 |
| 关键词: 热浸镀层 极性逆转 电偶电流 |
| DOI： |
| 投稿时间：2015-04-10 |
| 基金项目:国家自然科学基金项目(41006054)资助。 |
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| Galvanic Corrosion Study of Surface Coating and Steel Substrate |
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ZHANG Jie1, LI Xiao-long1,2, ZHANG Xin1,2, WANG Cui1,3
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| (1.Institute of Oceanology, Chinese Academy of Sciences, Qingdao, Shandong, 266071, China;2.University of Chinese Academy of Sciences, Beijing, 100049, China;3.School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400044, China) |
| Abstract: |
| [Objective] In this paper, in order to study whether the polarity reversal phenomenon is occurred after the damage of the hot-dipped coating.[Methods] The coupling electrodes were composed of Zn-55%Al-1.6%Si alloy, or Zn-5%Al-0.2%RE and alloyed with carbon steel. The galvanic current was tested in natural seawater and medium with different Cl- concentrations to study the possibility of polarity reversals.[Results] The experimental results show that the galvanic couple composed with two kinds of coating alloys and carbon steel did not occur the polarity reversal phenomenon in all the experimental conditions.[Conclusion] The coupling current value of the galvanic couple composed with the same coating alloy and carbon steel was different in different Cl- concentrations medium. With the increase of the Cl- concentration, the coupling current was increased. |
| Key words: hot-dipped coating polarity reversal galvanic current |
