Inhibition Studies of a Few Organic Compounds and Their Condensation Products on the Corrosion of Zinc in Hydrochloric Acid Medium

Authors

SHANTHAMMA K. RAJAPPA
THIMMAPPA V. VENKATESHA

DOI

-

Abstract

The corrosive behavior of zinc in HCl solution containing various concentrations of glutaraldehyde GTD, glycine GLN, methionine MTN, and their condensation products formed between GTD + GLN (CP1) and GTD + MTN (CP2) was investigated. The corrosion-inhibitive action of these compounds on zinc metal was studied using chemical and electrochemical methods. The results showed that the compound CP2 is the best inhibitor and that its inhibition efficiency reaches 92.56% at 10^{-2} M in 0.05 M acid concentration. As an inhibitor, CP2 was found to have a predominant cathodic effect and its adsorption was confirmed with the Temkin isotherm. The effect of temperature on the corrosion of zinc was investigated by the weight-loss method. The morphology of the corroded surface was studied by SEM technique to obtain information about the adsorption of inhibitor molecules on the zinc surface.

First Page

189

Last Page

196

Recommended Citation

RAJAPPA, SHANTHAMMA K. and VENKATESHA, THIMMAPPA V. (2003) "Inhibition Studies of a Few Organic Compounds and Their Condensation Products on the Corrosion of Zinc in Hydrochloric Acid Medium," Turkish Journal of Chemistry: Vol. 27: No. 2, Article 6. Available at: https://journals.tubitak.gov.tr/chem/vol27/iss2/6