الفهرس | Only 14 pages are availabe for public view |
Abstract The present work is assigned to study the corrosion behavior of steel in 1 M hydrochloric acid solution and the inhibiting effect of some organic compounds. The obtained results showed that the inhibition efficiency of these compounds increased by increasing their concentration, so that the adsorption of these compounds is chemical and the adsorption of the organic compounds on steel surface in 1 M hydrochloric acid follows Langmuir adsorption isotherm. Potentiodynamic polarization technique was used as a second method to study the inhibiting effect of the used extracts. from these results it was found that these extracts act as mixed type inhibitors. Also, impedance spectroscopy measurements and electrochemical frequency modulation measurements were used. Some thermodynamic parameters are computed and discussed. Also, electrochemical frequency modulation measurements. The surface morphology of the surface was studies using scanning electron microscopy (SEM). Finally some quantum–chemical quantities and were computed and discussed. The obtained results of all methods are in good agreement. |