Improved Corrosion Resistance of Ni-Based Alloys by B-Induced Passivation Behavior
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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Related Research Unit(s)
Detail(s)
Original language | English |
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Article number | 2400496 |
Journal / Publication | Advanced Engineering Materials |
Volume | 26 |
Issue number | 16 |
Online published | 18 Jul 2024 |
Publication status | Published - Aug 2024 |
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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.
In: Advanced Engineering Materials, Vol. 26, No. 16, 2400496, 08.2024.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review