Influence of some metal ions on dissolution behaviour of aluminium-iron alloy in orthophosphoric acid

Abstract

Dissolution behaviour of aluminium-iron alloy was studied by weight loss and potentiostatic techniques at 30 +/-0.5 degrees C. The corrosion rate increases with acid concentration, immersion period and temperature. The effect of some metal ions (Cu"SUP 2+" , Zn"SUP 2+" , Cr"SUP 3+" , Mn"SUP 2+" , Na"SUP +" , K"SUP +" and Mg"SUP 2+" ) was studied in 1.00% orthophosphoric acid. All the metal ions except Cu"SUP 2+" stifled the dissolution of aluminium and the inhibition efficiency increased with increasing the metal ion concentration. (from Authors)