焊接转向架电化学腐蚀机理试验研究

于喜年; 王保岩; 刘军

doi:10.3969/j.issn.0258-2724.2012.021.01.022

焊接转向架电化学腐蚀机理试验研究

doi: 10.3969/j.issn.0258-2724.2012.021.01.022

基金项目:

辽宁省教育厅科学研究计划资助项目(2009A123)

详细信息

作者简介:
于喜年(1958-),男,教授,研究方向为金属材料涂层防腐及超短波辐射加热技术,电话:0411-84109269, E_mail:xny1960@163.com

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出版历程
- 收稿日期: 2010-12-21
- 刊出日期: 2012-02-25

Experimental Study on Electrochemical Corrosion Mechanism of Welded Bogies

摘要

摘要: 为揭示焊接转向架腐蚀规律,分析了焊接转向架所用钢板及其焊接试件在3.5%NaCl溶液中的腐蚀电位和交流阻抗.采用动电位扫描法测定试件的极化曲线并进行电偶腐蚀试验,得到焊缝处及焊缝两侧距离焊缝不同位置的电位分布规律.结果表明:焊缝处腐蚀电位最低,耐腐蚀性最差;试件焊缝周边钢板腐蚀电位较高, 09CuPCrNi-A焊接钢板腐蚀电位最高,为-0.458 V,耐腐蚀性最好;最大电偶电流密度为1.76 A/cm2,相当于0.018 mm/a 的腐蚀速度,应重视焊接转向架的电化学腐蚀.
- 转向架 /
- 电化学腐蚀 /
- 电位分布 /
- 耐腐蚀性 /
- 腐蚀机理
Abstract: In order to reveal the corrosion law of welded bogies, three types of steel plates and their welded specimens used for welded bogies were put in 3.5%NaCl solution, and their corrosion potentials and AC impedances were analyzed. Polarization curves of the specimens were obtained through potentiodynamic scanning. Meanwhile, galvanic corrosion tests were carried out to detect the potential distributions in welds and at a different location on the both sides of weld seams. The results show that the lowest corrosion potential and the worst corrosion resistance were in weld seams, and high corrosion potentials occurred at the steel plate around the weld seams. Among the test specimens, the highest corrosion potential and the best corrosion resistance, happened in the welded steel plate of 09CuPCrNi-A, where the highest value of potential was -0.458 V, and the highest value of galvanic current was 1.76 A/cm2, which was equivalent to a corrosion rate of 0.018 mm/a. Therefore, the electrochemical corrosion of welded bogies should be given sufficient attention.
- bogies /
- electrochemical corrosion /
- potential distribution /
- corrosion resistance /
- corrosion mechanism

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参考文献(1)

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文章访问数: 1401
HTML全文浏览量: 54
PDF下载量: 635
被引次数: 0

焊接转向架电化学腐蚀机理试验研究

doi: 10.3969/j.issn.0258-2724.2012.021.01.022

作者简介: 于喜年(1958-),男,教授,研究方向为金属材料涂层防腐及超短波辐射加热技术,电话:0411-84109269, E_mail:xny1960@163.com

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Experimental Study on Electrochemical Corrosion Mechanism of Welded Bogies

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作者简介:
于喜年(1958-),男,教授,研究方向为金属材料涂层防腐及超短波辐射加热技术,电话:0411-84109269, E_mail:xny1960@163.com