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Bensabra, Hakim
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article
Study of the influence of dithizone as an eco-friendly corrosion inhibitor on the corrosion behaviour of AA7075 aluminium alloy in neutral chloride solution
Abstract
<jats:p>The effect of 1,5-diphenylthiocarbazone (dithizone) as an eco-friendly corrosion inhibitor for protection of AA7075 aluminium alloy in chloride containing aggressive environment was studied by means of weight-loss, electrochemical measurements and Raman spectroscopy. The results indicate that the addition of dithizone decreases significantly the corrosion rate of AA7075 alloy, with efficiency proportional to the inhibitor concentration. The polarization curves show that dithizone works as mixed-type inhibitor to slow down the anodic and cathodic reaction kinetic. The morphology revealed by scanning electron microscopy and the Raman spectroscopy analysis clearly shows that the inhibitor contributes in the formation of a stable protective film on the AA7075 alloy due to the adsorption of dithizone molecules on aluminium alloy surface obeying Langmuir adsorption isotherm.</jats:p>