| 含钼耐候钢的腐蚀性能 |
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| 作者姓名： | 刘志勇 汪兵 贺信莱 杨善武 陈吉清 |
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| 作者单位： | 1. 北京科技大学材料科学与工程学院, 北京 100083; |
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| 基金项目： | 国家重点基础研究发展计划资助项目(2004CB619102) |
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| 摘 要： | 通过显微组织观察、周浸加速腐蚀实验、锈层微观分析、锈层交流阻抗特征分析等方法,研究了合金元素钼含量对耐候钢腐蚀性能的影响.合金元素钼可以促进钢中贝氏体组织的形成,促使锈层更加致密,对钢基体具有更好的保护性,有利于提高钢的耐腐蚀性能.随着钢中钼含量的增加,实验钢锈层的腐蚀电位正移,自腐蚀电流密度减小,锈层的阳极溶解反应受到明显阻碍,锈层具有更好的保护性.
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| 关 键 词： | 耐候钢 钼 耐腐蚀性能 贝氏体 |
| 收稿时间： | 2011-12-10 |
Corrosion resistance performance of molybdenum-containing weathering steel |
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| Affiliation: | 1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. Research and Development Center, Wuhan Iron and Steel(Group) Corp., Wuhan 430080, China;3. Institute for Structural Materials, Central Iron and Steel Research Institute, Beijing 100081, Chin |
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| Abstract: | The effect of the content of molybdenum as an alloying element on the corrosion resistance performance of weathering steel was investigated by microstructure observation, cycle immersion corrosion test, rust layer micro-analysis and electrochemical impedance spectra techniques. It is found that molybdenum can promote the formation of bainite in the steel and the rust layer denser. The rust layer has a better protection on the steel substrate and increases the corrosion resistance of the steel. With the increasing of molybdenum content in the steel, the corrosion potential of the rust layer on the steel shifts positively, the self-corrosion current density decreases, the anodic dissolution of the rust layer is impeded, which makes the rust layer better protective. |
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