• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 25 Issue 1
Mar.  2012
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Article Contents
YU Xinian, WANG Baoyan, LIU Jun. Experimental Study on Electrochemical Corrosion Mechanism of Welded Bogies[J]. Journal of Southwest Jiaotong University, 2012, 25(1): 133-138. doi: 10.3969/j.issn.0258-2724.2012.021.01.022
Citation: YU Xinian, WANG Baoyan, LIU Jun. Experimental Study on Electrochemical Corrosion Mechanism of Welded Bogies[J]. Journal of Southwest Jiaotong University, 2012, 25(1): 133-138. doi: 10.3969/j.issn.0258-2724.2012.021.01.022

Experimental Study on Electrochemical Corrosion Mechanism of Welded Bogies

doi: 10.3969/j.issn.0258-2724.2012.021.01.022
  • Received Date: 21 Dec 2010
  • Publish Date: 25 Feb 2012
  • 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.

     

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