Inhibition of the corrosion of aluminium in alkaline medium by 1-( phenyl)-3- (2-hydroxy phenyl)-propenone in the presence of tetrabutylammonium bromide

The inhibitive ,thermodynamics and adsorptive properties of 1-( phenyl)-3-(2-hydroxy phenyl)-propenone (PHPP) and tetrabutylammonium bromide (TBAB) for the corrosion of aluminium in 1.0 M NaOH solutions have been investigated by weight loss measurements at 303K and 323K and electrochemical measurements at 303K . It was found that the inhibition efficiency increased with PHPP concentration but decreased with increase in temperature. A synergistic effect was observed between TBAB and PHPP. The experimental results suggest that the presence of TBAB in the solutions stabilized the adsorption of PHPP molecules on the metal surfaces and therefore improve the inhibition efficiency. The mechanism of adsorption of inhibitors was proposed from the trend of inhibition efficiency with temperature and the values of , Δ , . Langmuir and Flory-Huggins adsorption isotherms were found to conform to the adsorption of the inhibitor on the aluminium surface in 1.0 M NaOH.

Author(s): J. R. Beulah Thavamani Esther Rania and T. Jeyarajb

Abstract | PDF

Share This Article