Corrosion behavior of high-strength spring steel for high-speed railway

Gang Niu; Yin-li Chen; Hui-bin Wu; Xuan Wang; Di Tang

doi:10.1007/s12613-018-1599-2

Volume 25 Issue 5

May 2018

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2018 > 25(5): 527-535

Gang Niu, Yin-li Chen, Hui-bin Wu, Xuan Wang, and Di Tang, Corrosion behavior of high-strength spring steel for high-speed railway, Int. J. Miner. Metall. Mater., 25(2018), No. 5, pp. 527-535. https://doi.org/10.1007/s12613-018-1599-2

Cite this article as:

Gang Niu, Yin-li Chen, Hui-bin Wu, Xuan Wang, and Di Tang, Corrosion behavior of high-strength spring steel for high-speed railway, Int. J. Miner. Metall. Mater., 25(2018), No. 5, pp. 527-535. https://doi.org/10.1007/s12613-018-1599-2

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Research Article

Corrosion behavior of high-strength spring steel for high-speed railway

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Corresponding author:
Yin-li Chen E-mail: yinli_chen@ustb.edu.cn
Received: 27 June 2017; Revised: 21 November 2017; Accepted: 23 November 2017

Abstract

Abstract

The corrosion resistance and evolution of corrosion products in medium-carbon high-strength spring steels were investigated in a neutral salt spray (5wt% NaCl solution). A formation model of γ-FeOOH and a transformation model describing the conversion of γ-FeOOH to α-FeOOH were constructed. The results indicated that, at the initial corrosion stage, the corrosion resistance was gradually improved with the addition of Cr; however, with the addition of alloying element V, the corrosion resistance decreased. These results were attributed mainly to the initial corrosion stage being closely related to the matrix microstructure parameters such as grain-boundary character and dislocation density. After the rust layer was formed at a later corrosion stage, the corrosion resistance was reinforced with the addition of Cr and V because Cr strongly influenced the composition, structure, and morphology of the corrosion products. The results presented herein show that Cr was conducive to the transformation of γ-FeOOH into α-FeOOH. Moreover, V and Cr exhibited obvious synergy and were enriched in the inner layer of the corrosion products.
- high-strength spring steel;
- corrosion resistance;
- alloying elements;
- rust layers;
- evolution model

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