Inhibition of corrosion of aluminium in 1.0 M NaOH using 1-(2, 4-dihydroxyphenyl)-3-(2-hydroxyphenyl)-propenone

J. R. Beulah, Thavamani Esther

Abstract

The inhibitive effect of 1-(2,4-dihydroxyphenyl)-3- (2-hydroxyphenyl)-propenone on the corrosion of alu minium in 1.0 M NaOH was investigated by weight loss, potenti odynamic polarization and electrochemical impedence measurements. The inhibition efficiencies of this c ompound increase with increasing concentration. The results obtained from chemical and electro chemical techniq ues were in good agreement. The surface morphology of the metal surface was investigated by scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) examination. The results revealed that the compound to appear inhibit corrosion through physisorption . Polarization measurements revealed that this compou nd act as a mixed type inhibitor.