Corrosion Behavior of Corrosion-Resistant Spring Steel Used in High Speed Railway

Jinbo Li,Shaojie Li,Hongyan Wu,Xiuhua Gao,Hongwei Chen,Ziying Zhu,Linxiu Du,Liying Song

doi:10.3390/app11188668

Abstract

Corrosion behavior of 60Si2Mn-A and 60Si2Mn-B in simulated industrial atmospheric environment was investigated by alternate immersion corrosion test and electrochemical method. The phase, morphology, characteristics of corrosion products, and the distribution of Cr, Cu, and Ni in the corrosion products of experimental steel were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), and electron probe microanalyzer (EPMA). The results show that the phase of rust layer is Fe3O4 and γ-FeOOH in the early stage and then changes to α-FeOOH and γ-FeOOH in the later stage; the size of the rust layer with corrosion resistance of 60Si2Mn is less than 60Si2Mn; the Cr element accumulates in the rust layer of the experimental steel in the early stage of corrosion resistance; and Cu, Ni, and Cr in the corrosion resistance 60Si2Mn are concentrated in the rust layer near the substrate In the later stage of corrosion. As the corrosion cycle is prolonged, the corrosion potential and the resistance of the rust layer of the experimental steel increases, and the corrosion current decreases; in the same corrosion cycle, the corrosion potential and corrosion resistance of 60Si2Mn-B are greater than 60Si2Mn, and the corrosion current is less than 60Si2Mn.

Highlights

IntroductionWith the expansion of railway network scale, with more and more extensive coverage and more and more complex effects on the environment, such as air pollution, acid rain, and other phenomena, the problems caused by the corrosion of railway fastener groups are more and more prominent, especially the hidden danger caused by the corrosion of elastic bar, the core component of railway fastener group; this has attracted more and more attention in the industry [1,2,3]
In recent years, the high-speed railway has developed rapidly
With the expansion of railway network scale, with more and more extensive coverage and more and more complex effects on the environment, such as air pollution, acid rain, and other phenomena, the problems caused by the corrosion of railway fastener groups are more and more prominent, especially the hidden danger caused by the corrosion of elastic bar, the core component of railway fastener group; this has attracted more and more attention in the industry [1,2,3]

Summary

Introduction

With the expansion of railway network scale, with more and more extensive coverage and more and more complex effects on the environment, such as air pollution, acid rain, and other phenomena, the problems caused by the corrosion of railway fastener groups are more and more prominent, especially the hidden danger caused by the corrosion of elastic bar, the core component of railway fastener group; this has attracted more and more attention in the industry [1,2,3]. The high-speed railway runs fast, and the amplitude and load of the elastic bar in use are greater than those of ordinary lines. The solution is to improve the service safety by passively replacing the spring bars before the service period. The spring bars are faced with many problems, such as missing inspection, false inspection, large amount of replacement, and so on, which causes the waste of manpower and material resources and causes great hidden danger to the driving safety of the highspeed railway

Methods

Results

Conclusion