The inhibition of 4-(2′-amino-5′-methylphenylazo) antipyrine on corrosion of mild steel in HCl solution
Ibrahim, Magdy A.M.; Khaled, Khaled F.; Abd El Rehim, S.S.;
Abstract
The effect of 4-(2′-amino-5′-methylphenylazo) antipyrine (AMPA) on the corrosion of mild steel in a 2 M HCl solution was studied using weight loss and potentiodynamic polarization techniques. All of the data reveal that AMPA acts as an inhibitor in the acid environment; furthermore, polarization data show that the compound behaves as a mixed-type inhibitor. It was found that the inhibition efficiency increases with an increase in AMPA concentration but decreases with an increase in temperature. Flory-Huggins adsorption isotherm and El Awady thermodynamic-kinetic model fit the experimental data of the studied compound. Thermodynamic parameters for corrosion and adsorption processes were obtained from experimental data of the temperature studies. © 2001 Published by Elsevier Science B.V.
Other data
Title | The inhibition of 4-(2′-amino-5′-methylphenylazo) antipyrine on corrosion of mild steel in HCl solution | Authors | Ibrahim, Magdy A.M.; Khaled, Khaled F. ; Abd El Rehim, S.S. | Keywords | 4-(2′-amino-5′-methylphenylazo) antipyrine;Corrosion inhibition;Adsorption isotherms;Mild steel;Hydrochloric acid solution | Issue Date | 1-Jun-2001 | Journal | Materials Chemistry and Physics | ISSN | 02540584 | DOI | 10.1016/S0254-0584(00)00462-4 | Scopus ID | 2-s2.0-0035372107 |
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