Abstract

The inhibition efficiency (IE) of trisodium citrate (TSC)-Zn2+ system in controlling corrosion of mild steel in well water has been evaluated
by weight loss method. A synergistic effect exists between TSC and Zn2+. The formulation consisting of 50 ppm of TSC and 25 ppm of
Zn2+ provides 87% of IE. FTIR spectra reveal that the protective film consists of Fe2+
-TSC complex and Zn(OH)2. Polarization of study
confirms the formation of a protective film on the metal surface .The inhibitor system controls the cathodic reaction predominantly

Key words: Corrosion inhibitors, well water, synergistic effect, trisodium citrate