Effect of copper addition on the microstructure, wear resistance, anti-corrosion and antibacterial behavior of laser cladding CoCrW coatings in marine environment

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2025-02-24 DOI:10.1016/j.surfcoat.2025.131966

Qian Dong , Shaoxian Zheng , Yudong An , Jibin Pu

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引用次数: 0

Abstract

In response to the issues of wear corrosion and marine bio-erosion faced by aluminum alloy surfaces in marine environments, a series of laser cladding CoCrW-xCu (x = 0, 2, 4, 8) coatings with good metallurgical bonding were prepared on the aluminum surface. The results showed that the addition of Cu by in situ alloying resulted in an increase in the concentration of high-angle grain boundaries (HAGBs) in the coatings and altered the thermodynamic stability of the coating surface. Meanwhile, the addition of copper affected the Co, Cr and W elemental segregation at crystal boundaries and crystal interiors. The synergistic effect of Co, Cr, W and Cu led to the fewest point defects in the passive film of CoCrW-2Cu and the densest film, effectively reducing the likelihood of film breakdown. Thereby the CoCrW-2Cu coating exhibited the best corrosion resistance and wear resistance, with the wear mechanisms being abrasive wear, slight adhesive wear and corrosive wear. In addition, the Cu-containing coatings exhibited remarkable antibacterial properties. This study holds significant theoretical value and practical implications for the application of aluminum alloy components in marine equipment.

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.