Ethanolamines as Corrosion Inhibitors for Aluminium 3S in Hydrochloric Acid

Chemistry Department, University School of Sciences, Gujarat University, Ahmedabad 380009 Manuscript received 21 February 1972; revised 4 June 1974; accepted 1 July 1974 Ethanolamine, diethanolamine, triethanolamine have been investigated as corrosion inhibitors for aluminium 3S in hydrochloric acid solutions. The effect of time, inhibitor concentration, hydrochloric acid concentration and temperature has been studied. Polarisation measurements indicate the predominant effect of the inhibitors on the cathode. The behaviour of these inhibitors towards various aluminium alloys has been given