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Original Article

ECB. 2013; 2(7): 494-498


CORROSION INHIBITION BY CARBOXYMETHYL CELLULOSE

N. Manimaran, S. Rajendran, M. Manivannan, J. Angelin Thangakani, A. Suriya Prabha.




Abstract

The inhibition efficiency (IE) of carboxymethyl cellulose (CMC)-Zn2+ system in controlling corrosion of carbon steel in ground water in
the absence and presence of Zn2+has been evaluated by weight loss method. The formulation consisting of 250 ppm CMC and 50 ppm Zn2+
has 98 % IE. A synergistic effect exists between CMC and Zn2+
. Synergism has been confirmed by synergism parameter. AC impedance
spectra confirm the formation of protective film on the metal surface. The nature of the protective film has been characterized by scanning
electron microscopy (SEM).

Key words: Carboxymethyl cellulose, carbon steel, ground water, SEM, AFM, F-Test, corrosion inhibition.






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