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Fabrication and multifunctional performance of MAO/PTFE composite coating on 6061 aluminum alloy for enhanced insulation, lubrication and corrosion resistance
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DOI：10.1016/j.mtla.2026.102810.png)
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Abstract
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To address the comprehensive protection challenges of 6061 aluminum alloy under harsh environments, a MAO/PTFE composite coating was fabricated via micro-arc oxidation combined with high-temperature vacuum sintering. The melted PTFE infiltrated into the porous MAO layer, forming a mechanically interlocked "hard-soft" structure. The composite coating achieved an average breakdown voltage of 5.01 kV, 10.2 times that of a single MAO layer, with a transition from surface flashover to bulk breakdown. The water contact angle reached 118.7°, and the friction coefficients under dry and wet conditions were as low as 0.2 and 0.15, respectively. The polarization resistance was enhanced to 3264.1 Ω·cm². This work substantially improves the insulation, lubrication, and corrosion resistance of aluminum alloy, offering a promising strategy for multifunctional surface protection.
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