Effect of three 2-allyl-p-mentha-6,8-dien-2-ols on inhibition of mild steel corrosion in 1 M HCl
| Autor: | M. Bouklah, A. Aouniti, Lhou Majidi, Abdelhamid Bouyanzer, S. Kharchouf, Belkheir Hammouti |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Chemistry(all)
General Chemical Engineering Inorganic chemistry Cathodic protection Corrosion lcsh:Chemistry symbols.namesake chemistry.chemical_compound Adsorption Hydrogen evolution GeneralLiterature_REFERENCE(e.g. dictionaries encyclopedias glossaries) ComputingMilieux_MISCELLANEOUS Inhibition Carvone Chemistry Langmuir adsorption model General Chemistry p-Mentha-6 8-dien-2-ol derivatives Dielectric spectroscopy lcsh:QD1-999 Steel symbols Chemical Engineering(all) Sorption isotherm |
| Zdroj: | Arabian Journal of Chemistry, Vol 7, Iss 5, Pp 680-686 (2014) |
| ISSN: | 1878-5352 |
| Popis: | 2-Allyl-p-mentha-6,8-dien-2-ols P1−P3 synthesized from carvone P are tested as corrosion inhibitors of steel in 1 M HCl using weight loss measurements, potentiodynamic polarisation and impedance spectroscopy (EIS) methods. The addition of 2-allyl-p-mentha-6,8-dien-2-ols reduced the corrosion rate. Potentiodynamic polarisation studies clearly reveal that the presence of inhibitors does not change the mechanism of hydrogen evolution and that they act essentially as cathodic inhibitors. 2-Allyl-p-mentha-6,8-dien-2-ols tested adsorb on the steel surface according to Langmuir isotherm. From the adsorption isotherm some thermodynamic data for the adsorption process are calculated and discussed. EIS measurements show the increase of the charge-transfer resistance with the inhibitor concentration. The highest inhibition efficiency (92%) is obtained for P1 at 3 g/L. The corrosion rate decreases with the rise of temperature. The corresponding activation energies are determined. |
| Databáze: | OpenAIRE |
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