Berberine as an Effective Corrosion Inhibitor for 7075 Aluminium Alloy in 3.5% NaCl Solution

The inhibition behavior of 5,6-dihydro-9,10-dimethoxybenzo[g]-1,3-benzodioxolo[5,6- a]quinolizinium (berberine) as an environment-benign corrosion inhibitor for AA7075 aluminium alloy was investigated in 3.5 wt.% NaCl solution by means of potentiodynamic polarization, AC impedance, scanning electrochemical spectroscopy (SECM) and scanning electron microscopy (SEM). The results showed that berberine can inhibit the corrosion of 7075 al alloy at different immersion time. The surface analysis also revealed the retardation of corrosion due to adsorption of inhibitor molecules on the al alloy surface.