Plant derived cationic dye as an effective corrosion inhibitor for 7075 aluminum alloy in 3.5% NaCl solution

다국어 초록 (Multilingual Abstract)

The inhibition of the corrosion of 7075 aluminum alloy in 3.5 wt.% NaCl solution by 5,6-dihydro-9,10-dimethoxybenzo[g]-1,3-benzodioxolo[5,6-a]quinolizinium (berberine) has been studied using electrochemicalimpedance spectroscopy (EIS), potentiodynamic polarization, scanning electrochemicalmicroscopy (SECM) and scanning electron microscopy (SEM). Inhibition efficiency was found toincrease with increasing concentration of berberine. The adsorption of the berberine on the 7075aluminum alloy surface obeyed the Langmuir adsorption isotherm. The adsorbed film on 7075aluminum alloy surface containing inhibitor was confirmed by the SEM, and SECM. The results obtainedshowed that the berberine could serve as an effective inhibitor of the corrosion of 7075 aluminum alloyin 3.5% NaCl.

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