The Chemical Nature of Aluminum Corrosion: V . Energy Transfer in Aluminum Dissolution
| Autor: | T. H. Nguyen, R. T. Foley |
|---|---|
| Rok vydání: | 1982 |
| Předmět: |
chemistry.chemical_classification
Range (particle radiation) Renewable Energy Sustainability and the Environment Chemistry Inorganic chemistry chemistry.chemical_element Salt (chemistry) Condensed Matter Physics Chloride Surfaces Coatings and Films Electronic Optical and Magnetic Materials Ion chemistry.chemical_compound Aluminium Potential energy surface Materials Chemistry Electrochemistry medicine Sulfate Dissolution medicine.drug |
| Zdroj: | Journal of The Electrochemical Society. 129:464-467 |
| ISSN: | 1945-7111 0013-4651 |
| DOI: | 10.1149/1.2123881 |
| Popis: | The transfer of energy during the dissolution of aluminum is represented by a potential energy surface. In chloride solution, the high energy aluminum metal ionizes rapidly to the A1 +§ ion which also hydrolyzes rapidly. At the start of the reaction, in the microsecond range, there are two species available for reaction, A1 +++ and AI(OH) § The reaction follows two alternative paths; the energy levels of the alternative species, A1C1 +* and AI(OH)C1 + have been measured. These two species react further to form a reasonable stable basic aluminum chloride that is transformed slowly to AI(OH)3 and finally to AI~_O~ �9 H20. The energy levels of these species have been measured. Reaction in sulfate solution differs because the intermediate species, AI(OHh + and AI(OH)SO~ occupy low energy levels, and the basic aluminum sulfate has a lower energy than AI(OH)3. In most practical cases of aluminum corrosion, the reaction proceeds in the reverse direction. The reactants are the oxide-covered aluminum surface and the anion combining to form the basic aluminum salt. |
| Databáze: | OpenAIRE |
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