Abstract: The corrosion inhibition of zinc in tartrate solution in the absence and in the presence of 3-Amino-4,6-dimethyle,thieno[2,3-b] pyridine-2-Carboxylic acid (ADTP) and/or insulating Poly(vinyl Pyrrolidine(PVP) matrix was investigated. The corrosion inhibitive action of these compounds on zinc metal was studied using electrochemical (Open Circuit and Galvanostatic polarization techniques). The thermodynamic parameters for corrosion of zinc were determined.  The effect of natural water samples in Taiz-city (Yemen) such as Red Sea water, under-ground water, Tab-water and bottled-water on corrosion rate of zinc have been studied. It was noticed that the thermodynamic parameters from derived polarization technique measurements that ∆Had for the adsorption of and resulted in a positive value (endothermic). The adsorption typed is a physical-chemical adsorption. The heats of adsorption and free energies of adsorption are negative; this suggests that there is a strong interaction of the inhibitor molecules with the metal surface resulting in their spontaneous adsorption forming a highly adherent film [1].

 

Keywords: Corrosion, Zinc, Tartrate, Water