Influence of high-temperature aluminizing treatment on the corrosion resistance of 90/10 copper-nickel alloy. Issue 5 (20th August 2021)

• Record Type: Journal Article
• Authors: Gao, Yuhang; Chen, Xiaohong; Liu, Ping; Zhou, Honglei; Fu, Shaoli; Li, Wei; Liu, Xinkuan; Ma, Fengcang; Zhu, Yanbo; Wu, Jiayan
• Is Part Of: Anti-corrosion methods and materials. Volume 68:Issue 5(2021)
• Page Start: 365
• Page End: 372
• Publication Date: 2021-08-20
• Subjects: High temperature -- Corrosion resistance -- 90/10 copper-nickel alloy -- Al-Ni phase -- Aluminized layer; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1108/ACMM-04-2021-2467
• Languages: English
• ISSNs: 0003-5599

Abstract

Abstract : Purpose: This study aims to investigate the effect of coatings prepared by the addition of copper-aluminum alloy powder on the corrosion behavior of 90/10 copper-nickel alloy. Design/methodology/approach: Coatings of copper-aluminum alloy powder at different contents (Wt.% = 50%, 60%, 70% and 80%) were prepared by the high-temperature heat treatment process. The microstructure and component of the coatings were characterized by scanning electron microscope, X-ray diffraction, energy dispersive spectrometer and X-ray photoelectron spectroscopy. The electrochemical properties of the coating were explored by electrochemical impedance spectroscopy. Findings: The results show that the aluminized layer was successfully constructed on the surface of 90/10 copper-nickel alloy, the composition of the coating was composed of copper-aluminum phase and aluminum-nickel phase, the existence of the aluminum-nickel phase was formed by the diffusion of Ni elements within the substrate and because of the diffusion, the Al-Ni phase was distributed in the middle and bottom of the coating more. The Al-Ni phase is considered to be the enhanced phase for corrosion resistance. When the copper-aluminum alloy powder content is 70 Wt.%, the corrosion resistance is the best. Originality/value: The enhancement of corrosion resistance of 90/10 copper-nickel alloy by the copper-aluminum alloy powder was revealed, the composition of the aluminized layer and the mechanism of corrosion resistance were discussed.