Author : Abbas Hantoosh, Anwer
Inhibition of Aluminum Corrosion in Hydrochloric Acid Using Hexadecyltrimethyl Ammonium Bromide (Ctabr)
Engineering and Technology Journal,
2013, Volume 31, Issue 7, Pages 1395-1403
The corrosion inhibition of aluminum in (1M ) hydrochloric acid solution in the presence of Hexadecyltrimethyl ammonium bromide (CTABr) at temperature range of 30o – 50 Cowas studied using galvanostatic polarization techniques. The results showed that the inhibition occurs through adsorption of the inhibitor molecules on the metal surface. The inhibition efficiency (%IE)was found to increase with increasing inhibitor concentration (2*10-6 M – 12*10-6 M) and decreased with increasing temperature. The behavior of these compounds on the metal surface was found to obey Temkin adsorption isotherm. Thermodynamic parameters for adsorption and activation processes were determined. Galvanostatic polarization data indicated that these compounds act as mixed- type inhibitors. Phenomenon of physical adsorption is deduced from the obtained values of Ea*andΔGads.