Issue 65, 2017, Issue in Progress

Effects of Cu addition on the corrosion behavior of NiCoCrMo alloys in neutral chloride solution

Abstract

The influence of Cu addition (0–4 mass%) on the corrosion behavior of Ni–30Co–16Cr–15Mo alloy in neutral chloride solution is investigated by electrochemical measurements. The results indicate that alloy with 0.5 mass% Cu shows inferior corrosion resistance compared to Cu-free alloy under open-circuit potential, which is possibly ascribed to the galvanic corrosion from the insufficient coverage of Cu on the passive film; a higher fraction of Cu results in a significant improvement on corrosion resistance, and Cu is believed capable of strengthening the passivation and postponing the oxidization of dominant Cr(III) in the passive film into more soluble Cr(VI).

Graphical abstract: Effects of Cu addition on the corrosion behavior of NiCoCrMo alloys in neutral chloride solution

Article information

Article type
Paper
Submitted
18 May 2017
Accepted
15 Aug 2017
First published
22 Aug 2017
This article is Open Access
Creative Commons BY license

RSC Adv., 2017,7, 40779-40790

Effects of Cu addition on the corrosion behavior of NiCoCrMo alloys in neutral chloride solution

B. Yang, J. Li, X. Gong, Y. Nie and Y. Li, RSC Adv., 2017, 7, 40779 DOI: 10.1039/C7RA05617F

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