Preparation and properties of micro-arc oxidation self-lubricating composite coatings containing paraffin

Li, Zhenwei; Di, Shichun

doi:10.1016/j.jallcom.2017.05.138

Cited by 34 publications

(11 citation statements)

References 31 publications

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“…9,10 For the coatings to be used in different applications, it is required that the coefficient of thermal expansion of the base metal and the coating be as close as possible to eliminate the formation of micropores and microcracks observed in coatings as a result of unequal expansion that can occur during the fabrication. 11 Although much of these coatings have been used for different applications, graphene coating has stood out as a potential candidate for BPP application due to its high flexibility that eliminates chipping and cracks in coatings. Furthermore, graphene coating has antistatic capabilities, incredible hydrophobic properties, and solid qualities over ceramic and other coatings employed in the BPP applications.…”

Section: Introductionmentioning

confidence: 99%

A review of bipolar plates materials and graphene coating degradation mechanism in proton exchange membrane fuel cell

Okonkwo

Emori

Uzoma

et al. 2021

Intl J of Energy Research

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Section: Introductionmentioning

confidence: 99%

A review of bipolar plates materials and graphene coating degradation mechanism in proton exchange membrane fuel cell

Okonkwo

Emori

Uzoma

et al. 2021

Intl J of Energy Research

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“…These two methods both demonstrate excellent adhesive strength between the MAO coatings and ZL109 substrate which would be suitable for commercial applications. The in situ formation of MAO coatings promises the good adhesive strength to the substrate [ 34 ].…”

Section: Resultsmentioning

confidence: 99%

“…When the voltage reaches the critical discharge potential, the thin oxide layers formed in the passivation stage will be broken down, and many tiny sparks around the sample can be seen [43][44][45]. Electrical properties of the main substances of the Al-Si alloy surface are shown in table 1 (compiled from references [8,34]). It can be seen that the dielectric strength of silica is 1.5-2.5 times higher than that of alumina.…”

Section: The Stable Oxidation Stage (Ii)mentioning

confidence: 99%

Influence of silicon on growth mechanism of micro-arc oxidation coating on cast Al–Si alloy

Dong

Yang

et al. 2018

R. Soc. open sci.

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Micro-arc oxidation (MAO) is a plasma-assisted electrochemistry method to prepare protective ceramic coatings on aluminium alloys. Alloy elements of the Al-alloy substrate, such as Si, Cu, Mg and Li, have effects on the microstructure and composition of the MAO coatings. Usually, silicon distributes in the cast Al–Si alloy substrate as small laths and they cover approximately 10% of the substrate surface. Therefore, their effects on the growth process and microstructure of the MAO coatings are worthy of notice. In the present study, oxide coatings with a thickness of 15–18 µm were prepared on the ZL109 Al–Si alloy by MAO. The phase content, surface morphology and element distribution of the coatings were investigated by X-ray diffraction, grazing incidence X-ray diffraction, scanning electron microscope, and electron probe micro-analysis respectively. The average hardness of the coatings was 622.3 ± 10.2 HV0.05. The adhesive strength of the coatings is 40.55 ± 2.55 N, and the adhesion of the coatings could be rated as 5B by tape test according to ASTM D3359-17 standard test methods, which indicated a high adhesive strength between the MAO coating and substrate. The effects of silicon laths on surface morphology and composition of the coatings were discussed, and a model was put forward to describe the growth process of the MAO coatings on cast Al–Si alloys. The authors believe that the high silicon content of the substrate has no adverse influence on the structure and properties of the MAO coating on the ZL109 alloy.

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“…In the coating on the PEO‐modified Al, the pores and cracks act as the channels of corrosive liquid to the substrate, and they also impair the coating intensity. Therefore, for improving the corrosion and wear resistance, reducing the pores and cracks in the coating is one of the focal method . Furthermore, intensifying corrosion‐resistant phases and hard phases by PEO reactions or adding particles in the electrolyte is another method for preparing satisfying coating .…”

Section: Introductionmentioning

confidence: 99%

Investigation on corrosion and wear resistance of MgO‐Al₂O₃ composite coating prepared by plasma electrolytic oxidation

Liu

Wang

et al. 2020

Int J Applied Ceramic Tech

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Ceramic coatings were prepared on 6061 Al alloy in a mixed electrolyte with/without MgO powders at different treatment durations. The results of energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) showed that MgO powder was incorporated into the coatings, and Mg species gradually aggregated into coating inside as prolonging the oxidation time. Scanning electron microscopy (SEM) showed that MgO additive had a certain effect on the microstructures and coating thickness. The corrosion behavior tests evaluated by potentiodynamic polarization tests and electrochemical impedance spectroscopy (EIS) in 3.5 wt% NaCl solution suggested that at the same treatment time, the addition of MgO powders can improve the corrosion resistance of the coating, and the Mg-rich layer can affect the corrosion resistance of the coating. The tests of mechanical properties showed that the addition of MgO powders improved the stability and hardness of the coating. K E Y W O R D S corrosion resistance, friction coefficient, MgO, plasma electrolytic oxidation Investigation on corrosion and wear resistance of MgO-Al 2 O 3 composite coating prepared by plasma electrolytic oxidation. Int J Appl Ceram

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Preparation and properties of micro-arc oxidation self-lubricating composite coatings containing paraffin

Cited by 34 publications

References 31 publications

A review of bipolar plates materials and graphene coating degradation mechanism in proton exchange membrane fuel cell

A review of bipolar plates materials and graphene coating degradation mechanism in proton exchange membrane fuel cell

Influence of silicon on growth mechanism of micro-arc oxidation coating on cast Al–Si alloy

Investigation on corrosion and wear resistance of MgO‐Al₂O₃ composite coating prepared by plasma electrolytic oxidation

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Preparation and properties of micro-arc oxidation self-lubricating composite coatings containing paraffin

Cited by 34 publications

References 31 publications

A review of bipolar plates materials and graphene coating degradation mechanism in proton exchange membrane fuel cell

A review of bipolar plates materials and graphene coating degradation mechanism in proton exchange membrane fuel cell

Influence of silicon on growth mechanism of micro-arc oxidation coating on cast Al–Si alloy

Investigation on corrosion and wear resistance of MgO‐Al2O3 composite coating prepared by plasma electrolytic oxidation

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Investigation on corrosion and wear resistance of MgO‐Al₂O₃ composite coating prepared by plasma electrolytic oxidation