Inhibition of acidic corrosion of aluminum by triazoline derivatives
- Alexandria Univ., Ibrahimia (Egypt). Dept. of Chemistry
- Alexandria Univ., Ibrahimia (Egypt). Dept. of Materials Science
Inhibition of the corrosion of aluminum (Al) in hydrochloric acid (HCl) by some triazoline derivatives was studied in relation to the concentration of the inhibitors using gasometry, the weight-loss method, and the potentiodynamic technique. All compounds investigated were found to be inhibitors of the mixed type. The inhibitory character of the additives depended upon the +R (resonance) and +I (inductive) powers of alkyl or aryl groups of the triazoline derivatives. Inhibition was ascribed to the adsorption of the inhibitor onto the metal oxide surface following the Flory-Huggins isotherm. The compounds were adsorbed on the metal surface. Each molecule of the inhibitors occupied an average of 3.8 active sites on the metal surface. The values of activation free energies varied between [minus]30 kJ/mol and [minus]45 kJ/mol.
- OSTI ID:
- 5118053
- Journal Information:
- Corrosion (Houston); (United States), Vol. 50:2; ISSN 0010-9312
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALUMINIUM
CORROSION PROTECTION
ACTIVATION ENERGY
ADSORPTION ISOTHERMS
ALUMINIUM OXIDES
CORROSION INHIBITORS
MEASURING METHODS
ORGANIC NITROGEN COMPOUNDS
PERFORMANCE TESTING
ALUMINIUM COMPOUNDS
CHALCOGENIDES
ELEMENTS
ENERGY
ISOTHERMS
METALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
TESTING
360105* - Metals & Alloys- Corrosion & Erosion