Corrosion-wear behavior of nanocrystalline Fe<sub>88</sub>Si<sub>12</sub> alloy in acid and alkaline solutions

Li-cai Fu; Wen Qin; Jun Yang; Wei-min Liu; Ling-ping Zhou

doi:10.1007/s12613-017-1380-y

Volume 24 Issue 1

Jan. 2017

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2017 > 24(1): 75-82

Li-cai Fu, Wen Qin, Jun Yang, Wei-min Liu, and Ling-ping Zhou, Corrosion-wear behavior of nanocrystalline Fe₈₈Si₁₂ alloy in acid and alkaline solutions, Int. J. Miner. Metall. Mater., 24(2017), No. 1, pp. 75-82. https://doi.org/10.1007/s12613-017-1380-y

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Li-cai Fu, Wen Qin, Jun Yang, Wei-min Liu, and Ling-ping Zhou, Corrosion-wear behavior of nanocrystalline Fe88Si12 alloy in acid and alkaline solutions, Int. J. Miner. Metall. Mater., 24(2017), No. 1, pp. 75-82. https://doi.org/10.1007/s12613-017-1380-y

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Research Article

Corrosion-wear behavior of nanocrystalline Fe₈₈Si₁₂ alloy in acid and alkaline solutions

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Corresponding author:
Li-cai Fu E-mail: lfu@hnu.edu.cn
Received: 23 June 2016; Revised: 13 October 2016; Accepted: 14 October 2016

Abstract

Abstract

The corrosion-wear behavior of a nanocrystalline Fe₈₈Si₁₂ alloy disc coupled with a Si₃N₄ ball was investigated in acid (pH 3) and alkaline (pH 9) aqueous solutions. The dry wear was also measured for reference. The average friction coefficient of Fe₈₈Si₁₂ alloy in the pH 9 solution was approximately 0.2, which was lower than those observed for Fe₈₈Si₁₂ alloy in the pH 3 solution and in the case of dry wear. The fluctuation of the friction coefficient of samples subjected to the pH 9 solution also showed similar characteristics. The wear rate in the pH 9 solution slightly increased with increasing applied load. The wear rate was approximately one order of magnitude less than that in the pH 3 solution and was far lower than that in the case of dry wear, especially at high applied load. The wear traces of Fe₈₈Si₁₂ alloy under different wear conditions were examined and analyzed by scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy. The results indicated that the tribo-chemical reactions that involve oxidation of the worn surface and hydrolysis of the Si₃N₄ ball in the acid solution were restricted in the pH 9 aqueous solution. Thus, water lubrication can effectively improve the wear resistance of nanocrystalline Fe₈₈Si₁₂ alloy in the pH 9 aqueous solution.
- iron silicon alloys;
- nanocrystalline alloys;
- wear behavior;
- corrosion;
- acid solutions;
- alkaline solutions

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