Inhibition of acidic corrosion of aluminium using ethoxylated fatty amide

The inhibitive action of some compounds of ethoxylated fatty amide with different, numbers of ethylene oxide units towards the corrosion of aluminium.,in 2M HCl was. studied using weight- loss-hydrogen-evolution, and galvanostatic-polarization measurements. The inhibition effiency increased with increasing concentration and the-number of ethylene oxide units. The inhibitive effect of these compounds was explained in terms, of adsorption on, them: metal surface through ethoxy groups; while the hydrocarbon parts. protrude, brush-like, into the solution. The adsorption process follows the Langmuir adsorption isotherm.