Corrosion and Electrochemical Behaviors of As-Cast Mg-8Y and Mg-5Y-7Gd-1Nd-0.5Zr Magnesium Alloys in NaCl Aqueous Solution
| Autor: | Yang Shi, Yu Long Zhang, Xia Deng, Xinggang Li, Min Peng, Xin Zhang, Ling Ying Kong, Kui Zhang |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
Aqueous solution Mg alloys Magnesium Mechanical Engineering Inorganic chemistry Oxide chemistry.chemical_element Condensed Matter Physics Electrochemistry Corrosion chemistry.chemical_compound Cathodic reaction chemistry Mechanics of Materials Immersion (virtual reality) General Materials Science Nuclear chemistry |
| Zdroj: | Materials Science Forum. :437-442 |
| ISSN: | 1662-9752 |
| Popis: | The corrosion mechanisms of as-cast Mg-8Y and Mg-5Y-7Gd-1Nd-0.5Zr Mg alloys in 5% NaCl aqueous solution were investigated by electrochemical testing and SEM observation. The electrochemical results indicated that the corrosion resistance of Mg-8Y and Mg-5Y-7Gd-1Nd-0.5Zr alloys in 5% NaCl aqueous solution gradually deteriorated with increasing of immersion time expect for 2h and 24h immersion. The Cl- anion led to the initiation and development of the corrosion pits. The cathodic reaction was driven by hydrogen evolution reaction. The presence of filiform corrosion also proved a resistant oxide film naturally formed on the surface of Mg-8Y and Mg-5Y-7Gd-1Nd-0.5Zr alloys. The corrosion resistance of Mg-5Y-7Gd-1Nd-0.5Zr was better than Mg-8Y. |
| Databáze: | OpenAIRE |
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