growth, corrosion, and wear study of nanocomposite peo coating in electrolyte containing nickel sulfate

plasma electrolytic oxidation (peo) was performed on a 1010 aluminum alloy. to achieve thenanocomposite structure, si3n4 nanoparticles were added into the electrolyte. in an alkaline aqueoussuspension (silicate-based), the effect of adding niso4 on the applied voltage, microstructure,composition, wear, and corrosion resistance of peo coatings was investigated using scanningelectron microscopy (sem), elemental analysis with energy dispersive spectroscopy (eds), x-raydiffraction (xrd), cyclic polarization test, and pin-on-disk wear test. the results showed that addingnickel sulfate (niso4) and infiltration of its constituents into coatings lead to a more favored corrosionbehavior. moreover, in the case of best sample, anodic current at the highest applied potentialcondition during the cyclic polarization test indicated a drop within two decades. moreover,coefficient of friction decreased almost by half.