Some tetrazolic compounds as corrosion inhibitors for copper in nitric acid mediumInternational Scientific Journal For Alternative Energy And Ecology (2008)
AbstractThe corrosion inhibition of copper in 0.1M HNO3 was studied by gravimetric, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) measurements by the use of tetrazolic compounds such as 1,2,3,4-tetrazole (TTZ), 1-phenyl-1,2,3,4-tetrazole (PT), 5-amino-1,2,3,4-tetrazole (AT) and 1-phenyl-5-mercapto-1,2,3,4-tetrazole (PMT). The addition of these compounds acts differently on the kinetic of corrosion process of copper in nitric medium. The comparative study indicates that PMT is the best inhibitor. Its inhibition efficiency increases while its concentration increases in solution to attain 97% at 10-3M. Electrochemical measurements show that both polarization and transfer resistances increase with PMT concentration. The adsorption of PMT on the copper surface followed the Frumkin isotherm model. The results obtained from the various methods are in good agreement.
- nitric acid,
Citation InformationM. Mihit, L. Bazzi, R. Salghi, B. Hammouti, et al.. "Some tetrazolic compounds as corrosion inhibitors for copper in nitric acid medium" International Scientific Journal For Alternative Energy And Ecology Vol. 62 (2008)
Available at: http://works.bepress.com/mihit_mohammed/5/