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Effects of plasma nitriding on low alloy Cr-Mo-V steel

Abstract : In this study the effects on resistance to corrosion of a low alloy steel after plasma nitriding has been reported. Nitriding was performed at a low temperature of 450 °C and also at 520 °C for the same duration of 10 h in the plasma of nitrogen and hydrogen (80:20) gas mixture. Sample holder was biased at -250 V and the working pressure was kept at around 500 Pa. After nitriding the steel samples along with the bare steel were exposed to X-ray diffraction (XRD) to understand the phase formation. For the assessment of corrosion resistance properties potentiodynamic polarization tests of the bare and plasma nitrided steels in 3.5% NaCl electrolyte were performed. Nitriding at 520 °C had shown the best corrosion resistance. However, broad passivation region had been shown after nitriding at 450 °C.
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Submitted on : Thursday, April 1, 2021 - 3:35:23 PM
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Kalimi Trinadh, Corinne Nouveau, K. Ram Mohan Rao. Effects of plasma nitriding on low alloy Cr-Mo-V steel. Materials Today: Proceedings, Elsevier, 2021, 40 (supplement 1), pp.S79-S82. ⟨10.1016/j.matpr.2020.03.720⟩. ⟨hal-03187989⟩

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