Preparation of MAO Film Layer on LY12 Aluminum Alloy Surface in Sodium Hexametaphosphate Solution

Abstract

Aluminum alloy is widely used in power grids to solve the problem of aluminum excess and copper deficiency. The MAO film is prepared by micro-arc oxidation on LY12 aluminum alloy with phosphate electrolyte. The growth rate of film layer in different treatment time is studied and the variation trend of film in growth and outward growth was carried out. Finally, the morphology and composition of the film were tested by SEM and EDS. The results show that the initial growth of micro-arc oxidation is slow, mainly grow outwards, the medium-term rate is accelerated, the later period is slow, and the middle and late stages are mainly grow inwards. Phosphorus in the electrolyte participates in the film reaction.

Microstructure and corrosion performance of plasma electrolytic oxidation coatings on the surface of conventional and selective laser melted Ti-6Al-4V alloy

“…Plasma electrolytic oxidation on aluminum alloys in electrolytes containing (NaPO 3 ) 6 showed that the oxide coatings had a porous microstructure with fine pores, which form craters on the surface of the alloy resulting from the remelting events in the discharge channels and the growth trend of the coatings was almost linear [31].…”