Abstract: The inhibition efficiency of glutaric acid in controlling corrosion of Aluminium in an aqueous solution at pH 10, in the absence and presence of Zn2+ has been evaluated by weight loss method. The formulation consisting of 250 ppm of glutaric acid and 50 ppm of Zn2+ has 90% corrosion inhibition efficiency. A synergistic effect exits between glutaric acid and Zn2+. The mechanistic aspects of corrosion inhibition have been evaluated by polarization study. In the presence of inhibitor, linear polarization resistance increases and corrosion current decreases; The protective film has been analyzed by FTIR spectroscopy. The protective film consists of Aluminium-glutaric acid complex and zinc-glutaric acid complex. The surface morphology of the film has been investigated by AFM. The protective film is in the order of nano range. The protective film consists of self-assembled monolayers of glutaric acid which is confirmed by FTIR spectroscopy and AFM study.
Keywords: Corrosion inhibition, Aluminium at pH 10, glutaric acid, FTIR, AFM, self-assembling nanofilms.
Title: Corrosion Inhibition by Self Assembling Nanofilms of Glutaric Acid
Author: P. Satyabama, K. Rajesh, S. Rajendran
International Journal of Mathematics and Physical Sciences Research
ISSN 2348-5736 (Online)
Research Publish Journals
