Enhanced corrosion and wear resistance of Zn–Ni/Cu–Al2O3 composite coating prepared by cold spray

Liu, Yuwen; Tan, Guibin; Tang, Jiahao; Zhang, Liuyan; Shen, Geng zhe; Gu, Zhiwei; Jie, Xiaohua

doi:10.1007/s10008-022-05335-3

Cited by 11 publications

(1 citation statement)

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“…A modified cold spray technique was used to deposit the high-purity Al and AlMgSi alloy coatings on Mg alloys, increasing their corrosion resistance and fatigue lifespan [19]. Additionally, the addition of Al 2 O 3 to cold-sprayed coatings effectively increased the corrosion and wear resistance [20][21][22]. This is due to the fact that the addition of alumina particles would improve the bonding and deposition quality to produce outstanding composite coatings [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Properties of Al-Based Ceramic Coating Deposited on Magnesium Alloy Surface by Cold Spraying

Ci¹,

Wang

Hu³

et al. 2023

Coatings

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In this study, pure Al and Al-Al2O3 composite coatings with a low porosity and high density were prepared on magnesium alloys by cold spraying. The surface morphology, component, hardness, interfacial bonding, wear and corrosion properties were investigated. Additionally, the relationship between the interface structure and the protective coatings’ quality was preliminarily established. Pure Al powder was used to create a coating with a homogeneous and dense microstructure. The hard-phase Al2O3 in the composite coatings was non-oxidized and would reduce the porosity of the coatings to improve their density and interfacial bonding by up to 55.82 MPa. The bonding mode of the pure Al coatings is primarily mechanical, whereas the bonding mode of the Al-Al2O3 mixed coatings is mechanical and metallurgical. The tough Al2O3 particles combined to form a layer of work-hardening reinforcement that resisted wear and effectively prevented it from spreading. The three Al-based coatings had excellent corrosion properties, as evidenced by their corrosion current being several orders of magnitude lower than that of the magnesium alloy substrates. The thick coating was significantly more corrosion-resistant than the thin coating and provided greater protection to the substrate. This study offers theoretical and technological assistance for the surface protection of magnesium alloy equipment in demanding conditions.

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