Comparative evaluation of corrosion resistance of wheel and rail steels in various media

Abstract

In order to increase the service life of rolling stock parts and rails, it is necessary to know the value of the corrosion rate of alloys in various media. In this work, the corrosion resistance of various alloys, used in railway transport, was investigated. To determine the rate of corrosion, a polarization method with the use of the potentiostat-galvanostat "Pi 50-Pro" was used. The value of the corrosion rate was determined on the basis of processing of the polarization curves with the use of the graphical method. To control the obtained results, corrosion rate was determined by decrease of the mass of samples, made from the same alloys (gravimetric method). Obtained results showed high convergence. Studies were carried out in a simulated solution. Based on a comparison of the values of the corrosion rate, the most resistant steels were determined. Corrosion resistance increases in series: 09G2S, 110G13L, St3ps, 55G, 60G, M76T, E76KHSF12KH1, 12KH18N9T.