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The inhibition efficiency of fructose (FR)-Zn2+ system in controlling corrosion of carbon steel in an aqueous environment has been evaluated by mass- loss method. The synergistic effect is noticed between fructose and Zn2+.The formulation consisting of 125 ppm of fructose and 50 ppm of Zn2+shows 84% inhibition efficiency(IE).At lower and higher pH value IE decreases. Polarisation study reveals that FR-Zn2+ system functions as a mixed inhibitor. AC impedance spectra reveal that a protective film is formed on the metal surface. FTIR spectra, UV absorbtion spectra and SEM studies have been used to investigate into the nature of the thin protective film formed on the metal surface. A suitable mechanism of corrosion inhibition is proposed based on the results obtained from mass loss study and surface analysis technique.