Synergistic effect of halide ions on the corrosion inhibition of aluminum in acidic medium by some polymers
| Autor: | U.J. Ekpe, Saviour A. Umoren, Olusegun K. Abiola, N. C. Oforka, Eno E. Ebenso, Ekerete Jackson |
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| Rok vydání: | 2006 |
| Předmět: |
chemistry.chemical_classification
integumentary system Polymers and Plastics Inorganic chemistry technology industry and agriculture Halide Concentration effect macromolecular substances General Chemistry Polymer Polyethylene glycol Polyvinyl alcohol Surfaces Coatings and Films chemistry.chemical_compound Corrosion inhibitor Adsorption chemistry PEG ratio Materials Chemistry |
| Zdroj: | Journal of Applied Polymer Science. 100:2889-2894 |
| ISSN: | 1097-4628 0021-8995 |
| DOI: | 10.1002/app.23505 |
| Popis: | The corrosion inhibition of aluminum in H2SO4 in the presence of polyvinyl alcohol (PVA) and polyethylene glycol (PEG) and the effect of addition of halides (KCl, KBr, KI) was studied using the hydrogen evolution technique at 30 and 40°C. Inhibition efficiency (%I) increases with concentration of PVA and PEG—-but with PEG having higher %I. The %I decrease with increase in temperature from 30 to 40°C in the absence and presence of inhibitor and halides. PVA and PEG were found to obey Freundlish adsorption isotherm. Phenomenon of physical adsorption is proposed from the obtained Ea, ΔGads, and Qads values obtained. The synergism parameters (SI) obtained were found to be greater than unity for both PVA and PEG, which indicates that the enhanced inhibition efficiency caused by the addition of halides is only due to synergism. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 2889–2894, 2006 |
| Databáze: | OpenAIRE |
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