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

摘要

Dissolution behaviour of aluminium-iron alloy has been studied by weight loss and potentiostatic techniques at 30 ± 0.5℃. The corrosion rate increases with acid concentratiop, immersion period and temperature. Effect of some metal ions (Cu~(2+), Zn~(2+), Cr~(3+), Mn~(2+), Na~+, K~+ and Mg~(2+)) has also been studied in 1.00% orthophosphoric acid. All the metal ions except Cu~(2+) stifled the dissolution of aluminium and the inhibition efficiency increased on increasing the metal ion concentration.