Enriched alloy layer on an Al-Cu alloy studied by cyclic voltammetry
| Autor: | C. E. Blanco Pinzon, S. J. García Vergara, Peter Skeldon |
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| Rok vydání: | 2017 |
| Předmět: |
Horizontal scan rate
History Materials science Alloy Inorganic chemistry Oxide chemistry.chemical_element engineering.material Computer Science Applications Education chemistry.chemical_compound chemistry Sodium hydroxide Etching (microfabrication) Aluminium engineering Cyclic voltammetry Layer (electronics) |
| Zdroj: | Journal of Physics: Conference Series. 786:012031 |
| ISSN: | 1742-6596 1742-6588 |
| DOI: | 10.1088/1742-6596/786/1/012031 |
| Popis: | The behaviour of enriched Al-0.7at.%Cu alloy is investigated using cyclic voltammetry. Enriched alloy layers at the interface between the alloy/oxide film were developed by alkaline etching at 5mAcm-2 in 0.1M sodium hydroxide solution at 298K, with the time of etching determining the extent of enrichment. Cyclic voltammograms were recorded at a scan rate of 10mV s-1 in naturally aerated 0.1M ammonium pentaborate solution at 298K. The current overshoot of the enriched alloys was different from that for non-enriched alloy. The latter material revealed the usual single peaks, which are very similar. In contrast, the overshoot comprised two or more components for the enriched alloys. The behaviour is suggested to be associated with the atomic bonding of aluminium in copper-rich and aluminium-rich regions of the enriched alloy layer, with influence on the activation potentials for oxidation of aluminium. |
| Databáze: | OpenAIRE |
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