Exfoliation corrosion susceptibility on friction stir welded aluminium 6061/Cr₂O₃ composite

Abstract The current study investigates the exfoliation corrosion behavior of friction stir welded aluminum composite. casting method was employed to fabricate chromium oxide (2 and 4% wt) reinforced Al 6061 composites. fabricated composite samples are with two process parameters. solution immersion tests were performed for intervals per ASTM G34 (24 h, 48 h), weight loss employed. sample is analyzed by optical microscope FESEM surface roughness. gelatinous product formed over can apply pressure grains resulting in formation pits. intergranular (IGC) continuous penetration suffering from IGC more susceptible pit. weight-loss not sufficient predict damage induced exco solution. Evaluating pit depth help know severity corrosion. measurement difficult due its irregular nature. roughness instrument used, represented average (Ra) (Rz). exposure duration welding parameters play a significant role More material lost at higher extended hours test, forming deterioration.