西南交通大学学报2012，Vol.47Issue(1)：133-138,6.DOI:10.3969/j.issn.0258-2724.2012.01.022
焊接转向架电化学腐蚀机理试验研究
Experimental Study on Electrochemical Corrosion Mechanism of Welded Bogies
摘要
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 μA/cm , which was equivalent to a corrosion rate of 0.018 mm/a. Therefore, the electrochemical corrosion of welded bogies should be given sufficient attention.关键词
转向架/电化学腐蚀/电位分布/耐腐蚀性/腐蚀机理Key words
bogies/ electrochemical corrosion/ potential distribution/ corrosion resistance/ corrosion mechanism分类
矿业与冶金引用本文复制引用
于喜年,王保岩,刘军..焊接转向架电化学腐蚀机理试验研究[J].西南交通大学学报,2012,47(1):133-138,6.基金项目
辽宁省教育厅科学研究计划资助项目(2009A123) （2009A123）
