Improved Corrosion Resistance of Ni-Based Alloys by B-Induced Passivation Behavior

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Ruochong Wang
  • Tianxu Qiu
  • Yaofeng Luo
  • Na Li
  • Yuankui Cao
  • Haixia Hu
  • Yong Liu

Detail(s)

Original languageEnglish
Article number2400496
Journal / PublicationAdvanced Engineering Materials
Volume26
Issue number16
Online published18 Jul 2024
Publication statusPublished - Aug 2024

Abstract

Nickel-based alloys exhibit excellent mechanical properties, but the corrosion resistance when exposed to NaCl solution needs to be improved, thus limiting their widespread applications. In this study, it is demonstrated that a moderate addition of boron, specifically 3.5 wt%, can effectively enhance both the tribological properties and corrosion resistance of Ni-based alloys. The microstructures evolution and corrosion mechanism of Ni–Cu–xB (0–5 wt%) alloys have been comprehensively investigated through the experimental characterization and phase diagram calculations. The improvements in corrosion resistance can be primarily attributed to the formation of continuous and dense passivation films. Additionally, the dissolved B fixes chloride ions to hinder the breakdown of passivation films. However, an excessive addition of boron can have a detrimental effect on corrosion resistance. While improving the formation of dense passivation films, the excessive presence of boron also prompts the precipitation of a Cu-rich phase that is highly susceptible to corrosion by chloride ions, thereby exacerbating the corrosion process in the alloy. © 2024 Wiley-VCH GmbH.

Research Area(s)

  • boron alloying, corrosion resistance, nickel-based alloys, wear resistance

Citation Format(s)

Improved Corrosion Resistance of Ni-Based Alloys by B-Induced Passivation Behavior. / Wang, Ruochong; Qiu, Tianxu; Luo, Yaofeng et al.
In: Advanced Engineering Materials, Vol. 26, No. 16, 2400496, 08.2024.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review