Surfactants as inhibitors for alkaline corrosion of aluminium

Inhibition of aluminium corrosion in NaOH solution by anionic surfactant as sodium (lauryl) sulphate, cationic surfactant as cetyl trimethyl ammonium bromide and non ionic surfactant as Triton-X 100 has been studied using weight-loss and hydrogen evolution methods. It is found that the inhibition efficiency depends on the type of SAS as well as its concentration. The order of increasing inhibition is as follows SLS < Triton - X 100 < CTAB Thermodynamic parameters are calculated.