Effect of copper alloying addition on the electrochemical corrosion behaviour of Fe3Al intermetallic in sulphuric acid solution
| Autor: | Riccardo Carlini, Giorgio Scavino, Gilda Zanicchi, Francesco Rosalbino |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Open-circuit voltage 020209 energy Mechanical Engineering Metallurgy Metals and Alloys Intermetallic chemistry.chemical_element 02 engineering and technology General Medicine 021001 nanoscience & nanotechnology Electrochemistry Copper Surfaces Coatings and Films Corrosion Dielectric spectroscopy chemistry Mechanics of Materials 0202 electrical engineering electronic engineering information engineering Materials Chemistry Environmental Chemistry Surface layer 0210 nano-technology Aluminide |
| Zdroj: | Materials and Corrosion. 67:1042-1048 |
| ISSN: | 0947-5117 |
| DOI: | 10.1002/maco.201608854 |
| Popis: | The effect of Cu alloying addition on the corrosion resistance of iron aluminide Fe3Al has been investigated. In this work, the corrosion behaviour of Fe3Al-5Cu (at%) alloys has been assessed by open circuit potential, potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS) measurements carried out in a 0.5 M H2SO4 solution, without stirring and in contact with the air. For comparison, the electrochemical tests have also been performed on Fe3Al intermetallic. The obtained electrochemical results indicate that iron aluminide Fe3Al-5Cu exhibits superior corrosion resistance as compared to Fe3Al. This improvement may be ascribed to the formation of a copper-enriched surface layer which shows higher protective effectiveness than that formed on Fe3Al intermetallic |
| Databáze: | OpenAIRE |
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