Abstract
The corrosion behavior of 6063 aluminum alloy in glycol-water solution with different concentrations of oxalic acid under different temperatures and the inhibitve effect of ammonium alcohol polyvinyl phosphate (AAPP) on its corrosion were investigated by weight loss experiment, electrochemical measurements and scanning electron microscopy (SEM). The results showed that low concentration of oxalic acid had a certain inhibitory effect on the corrosion of 6063 aluminum alloy in glycol-water solution, but high concentration of oxalic acid accelerated its corrosion. AAPP was a mixed type corrosion inhibitor with a predominantly anodic inhibition for 6063 aluminum alloy in a ethylene glycol-water solution containing oxalic acid, its corrosion inhibition efficiency was up to 90% at a concentration of 0.5 g/L under 30 ℃. The effect of AAPP on the surface of 6063 aluminum alloy obeyed the Langmuir isotherm equation. And the corrosion inhibition of AAPP for 6063 aluminum alloy was further confirmed by the results of weight loss experiment and SEM.
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