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Paper Details

Inhibitive action of polyvinyl alcohol Zn (II) system in corrosion inhibition of carbon steel in Ground water

Manimaran N*1, Rajendran S2, 3, Manivannan M4 and R. Saranya5

Journal Title:Journal of Chemical, Biological and physical sciences
Abstract


The inhibition efficiency (IE) of Polyvinyl alcohol (PVA) in controlling corrosion of carbon steel in ground water in the absence and presence of Zn2+ has been evaluated by weight loss study. 98 % IE is obtained from the formulation consisting of 250 ppm PVA and 50 ppm Zn2+. It is found that the IE of PVA increases by the addition of Zn2+ ion. A synergistic effect exists between PVA and Zn2+. The mechanistic aspects of corrosion inhibition have been studied using polarization study. Also FTIR spectra reveal that the protective film consists of Fe2+ PVA complex and Zn (OH)2. The scanning electron microscopy (SEM) study confirms the protection of carbon steel surface by strong adsorption of PVA. From the results of above studies a suitable mechanism for corrosion inhibition is proposed.

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