Abstract

MUTHUMANI, N. et al. Corrosion Inhibition by Amino Trimethylene Phosphonic Acid (ATMP) -Zn²⁺ System for Carbon Steel in Ground Water. Port. Electrochim. Acta [online]. 2012, vol.30, n.5, pp.307-315. ISSN 0872-1904.  https://doi.org/10.4152/pea.201205307.

The inhibition efficiency (IE) of Amino Trimethylene phosphonic acid (ATMP) in controlling corrosion of carbon steel immersed in ground water in the absence and presence of Zn²⁺ has been evaluated by weight loss method. It is observed that the synergistic formulation consisting of 250 ppm ATMP and 10 ppm of Zn²⁺ has 98% IE. Polarization study reveals that ATMP-Zn²⁺ system functions as a cathodic inhibitor system. AC impedance study reveals that a protective film is formed on the metal surface.

Keywords : carbon steel; corrosion inhibition; synergistic effect; cathodic inhibitor; phosphonic acid.

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