Wear and corrosion resistant coatings prepared on LY12 aluminum alloy by plasma electrolytic oxidation

Yang, Changchun; Zhu, Jiaqi; Cui, Suihan; Chen, Pinghu; Wu, Zihao; Ma, Zhengyong; Fu, Ricky K.Y.; Tian, Xiubo; Chu, Paul K.; Wu, Zhongzhen

doi:10.1016/j.surfcoat.2021.126885

Cited by 30 publications

(23 citation statements)

References 36 publications

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“…The XRD images of single MAO and composite coatings are shown in Figure 6A, respectively, where Al, α‐Al 2 O 3 , and γ‐Al 2 O 3 are detected in both coatings, with the diffraction peak intensity of Al being much greater than those of α‐Al 2 O 3 and γ‐Al 2 O 3 . According to the existing literature, the metastable γ‐Al 2 O 3 that mainly composes the loose outer layer can be converted into the stable α‐Al 2 O 3 that mainly makes up the dense inner layer at high temperature 18,25,26 . In addition, the overall XRD pattern of the composite coating is very similar to that of the single MAO coating, which might be due to the fact that the liquid PEG 400 did not crystallize or had poor crystallinity during the carbonization at 300°C.…”

Section: Resultsmentioning

confidence: 91%

“…According to the existing literature, the metastable γ-Al 2 O 3 that mainly composes the loose outer layer can be converted into the stable α-Al 2 O 3 that mainly makes up the dense inner layer at high temperature. 18,25,26 In addition, the overall XRD pattern of the composite coating is very similar to that of the single MAO coating, which might be due to the fact that the liquid PEG 400 did not crystallize or had poor crystallinity during the carbonization at 300 • C. However,…”

Section: Xrd Contact Angle Surface Roughness and Hardness Analysismentioning

confidence: 86%

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Preparation and properties of wear‐resistant carbonized‐ceramic composite coating on pure aluminum surface

Shao

Chen

et al. 2022

Int J Applied Ceramic Tech

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In this paper, a new composite coating was prepared on the surface of pure aluminum (Al) by combining the micro‐arc oxidation (MAO) technology with the polyethylene glycol (PEG 400) carbonization technology. The composite coating and the single MAO coating were observed by a scanning electron microscope, and an energy‐dispersive spectrometer, finding that the single MAO coating surface with volcano‐like pores and microcracks, was covered by the carbonized layer of the composite coating where the overall coating thickness was around 19.5 µm, including 17.5 µm of inner MAO coating. The material properties of the composite coating were characterized by X‐ray diffraction and X‐ray photoelectron spectroscopy. The wear resistance of the composite coating was tested under dry friction conditions, finding that the wear width on the composite coating surface was 909.6 µm only, which was around 55.7%, 50.4%, and 58.2% of those for pure Al substrate, single carbonized coating, and single MAO coating, respectively. Then the comprehensive wear resistance of the composite coating was explored under different sliding speeds and lubrication mediums. Finally, the wear‐resisting mechanism of the composite coating was discussed, concluding that the composite coating could effectively reduce adhesive wear and abrasive wear of the Al substrate.

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Section: Resultsmentioning

confidence: 91%

Section: Xrd Contact Angle Surface Roughness and Hardness Analysismentioning

confidence: 86%

Preparation and properties of wear‐resistant carbonized‐ceramic composite coating on pure aluminum surface

Shao

Chen

et al. 2022

Int J Applied Ceramic Tech

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“…The preparation of corrosion‐resistant film is a standard method in aluminum alloy corrosion protection 8 . The primary purpose is to separate the aluminum alloy matrix from the corrosion ions and achieve the aluminum alloy's protective effect by preparing a protective film on the surface of the aluminum alloy 9 . For example, Huang et al 10 designed a Ni‐SiC composite coating for corrosion protection, Merisalu et al 11 prepared a thin ceramic layer for corrosion protection, and Teja et al 12 prepared a silanized coating for corrosion protection.…”

Section: Introductionmentioning

confidence: 99%

Construction of hydrophobic lauric acid film on aluminum alloy and its corrosion resistance mechanism

Wang

Cao

et al. 2022

Surface & Interface Analysis

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6061 aluminum alloy is one of the light metal materials, which has the advantages of good elasticity and lightweight. However, aluminum alloy is susceptible to corrosion in industrial applications. Therefore, in this paper, we successfully prepared an organic lauric acid film on the surface of aluminum alloy by electrodeposition. The film was characterized by SEM, EDS, WCA, XPS, EIS, FT‐IR, and neutral salt spray test. According to the results of the EIS test, impedance value has increased by two orders of magnitude compared to the substrate, and corrosion current density reached 8.51 × 10−7 A/cm2. The salt spray test was conducted for 192 h before the corrosion point appeared, indicating that the film have better anticorrosion ion permeability. Calculated chemical results show that COOH of lauric acid is the dominant reaction group and the carboxyl group is near the aluminum alloy surface for the reaction equilibrium state, which provide a theoretical basis for the study of the film.

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“…Aluminum and aluminum alloys were widely used in automation areas and aerospace industries because of its excellent characteristics that include lower density, high strength properties and easy molding. [1][2][3] As an aviation material, 2024 aluminum alloy was widely used in aircraft fuselages. Aircraft located at coastal airports flew or parked in high humidity, high salt marine environments, where seawater or the humid marine atmosphere had caused serious corrosion damage to the aluminum alloy components of the aircraft.…”

Section: Introductionmentioning

confidence: 99%

Role of rare‐earth Y addition on formation and anticorrosion properties of MAO coating on 2024 aviation aluminum alloy

Zhang

Ran

Chen

et al. 2022

Int J Applied Ceramic Tech

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Different ceramic coatings were prepared on the surface of 2024 aviation aluminum alloy using micro-arc oxidation process in silicate based electrolyte combined with the rare earth based compound Y(NO 3 ) 3 ⋅6H 2 O. The thickness, hardness of the coating and conductivity of electrolyte were tested using relative devices, morphology and chemical composition were studied by scanning electron microscope and energy dispersive spectroscope, respectively. The phase composition of the coatings was characterized by X-ray diffraction and X-ray photoelectron spectroscopy. Furthermore, the corrosion resistance of the coating was evaluated by an electrochemical workstation. The results showed that the addition of Y(NO 3 ) 3 ⋅6H 2 O could improve the thickness and hardness of the coating. The morphological observation of the coating showed that Y(NO 3 ) 3 ⋅6H 2 O was successfully incorporated into the ceramic layer and that the coating had the smallest porosity at 1.5 g/L Y(NO 3 ) 3 . The phase composition of the coating was mainly γ-Al 2 O 3 , α-Al 2 O 3 , SiO 2 , Y 2 O 3 , and AlPO 4 . The corrosion resistance of coating in simulated seawater with the addition of Y(NO 3 ) 3 ⋅6H 2 O was significantly improved, and the values of |Z| 0.01 Hz and corrosion rate of the coating reached the maximum and minimum at 1.5 g/L Y(NO 3 ) 3 , which were 5.63 × 10 5 Ω cm 2 and 7.444 × 10 −4 mm/a, respectively.

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Wear and corrosion resistant coatings prepared on LY12 aluminum alloy by plasma electrolytic oxidation

Cited by 30 publications

References 36 publications

Preparation and properties of wear‐resistant carbonized‐ceramic composite coating on pure aluminum surface

Preparation and properties of wear‐resistant carbonized‐ceramic composite coating on pure aluminum surface

Construction of hydrophobic lauric acid film on aluminum alloy and its corrosion resistance mechanism

Role of rare‐earth Y addition on formation and anticorrosion properties of MAO coating on 2024 aviation aluminum alloy

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