Evaluation of the Influence of Alumina Nano-Particle Size and Weight Composition on the Corrosion Resistance of Monolithc Aa1070 Aluminium

Corrosion resistance of AA1070 aluminum alloy (AA1070) was compared to reinforced with alumina at weight composition (wt. %) 5% and 10%, grain size 150 nm 600 nm. Potentiodynamic polarization open circuit potential analysis were employed in 0.0125 M H2SO4, 3.5% NaCl H2SO4-3.5% solutions. Data showed solution the most deleterious peak corrosion rate value 6.682 mm/y while weakest 0.084 mm/y. wt. % particle generally displayed highest rate. However, visible decrease occurred increase fraction due growth protective oxide on composite reduction discontinuities. Cathodic anodic reaction mechanisms significantly differs respect electrolyte. Anodic mechanism appeared under activation control sulphate-chloride chloride solution, cathodic sulphate Significant degradation prevalent plot solution. Plots from shows composites monolithic Al thermodynamically stable H2SO4 In significant transients coupled high tendency are conspicuous. The chaotic thermodynamic behaviour active passive transition film.