Journal of the Chilean Chemical Society
versión On-line ISSN 0717-9707
BAEZA, H.; GUZMAN, M.; ORTEGA, P. y VERA, L.. CORROSION INHIBITION OF COPPER IN 0.5 M HYDROCHLORIC ACID BY 1,3,4-THIADIAZOLE-2,5-DITHIOL. J. Chil. Chem. Soc. [online]. 2003, vol.48, n.3, pp. 23-26. ISSN 0717-9707. doi: 10.4067/S0717-97072003000300004.
The inhibition of copper corrosion by 1,3,4-thiadiazole-2,5-dithiol (bismuthiol), under 0.5 M HCl at 25 C, was studied by means of the potentiodynamic polarization technique. It was found that bismuthiol was chemically adsorbed on the copper surface, and follows a Langmuir isotherm. The inhibition mechanism was found to be mixed, and it was originated through the formation of bismutiol-copper complexes on the surface of the metal. Bismuthiol shows good inhibition efficiency under these conditions