Abstract

A new perspective was reported to design the self-densified plasma electrolytic oxidation (SDF-PEO) coatings on magnesium alloys based on the dissolution-ionization-diffusion-deposition (DIDD) model. The main considerations of the new PEO electrolyte include the establishment of a thermodynamics diagram, the construction of a liquid-solid sintering system and the regulation of plasma sparkling kinetics. The SDF-PEO coating exhibited a homogeneous and dense microstructure, superior corrosion resistance and good technological adaptability. This work offers a novel theory to design surface treatment solutions with superior corrosion resistance and promising application prospects.

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