Nano-nickel–copper alloy deposit for improved corrosion resistance in marine environment
| Autor: | S. M. Silaimani, G. Vivekanandan, P. Veeramani |
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| Rok vydání: | 2014 |
| Předmět: |
6111 aluminium alloy
Environmental Engineering Materials science Scanning electron microscope Alloy Metallurgy technology industry and agriculture chemistry.chemical_element engineering.material 5005 aluminium alloy equipment and supplies Copper Corrosion Nickel chemistry engineering 5052 aluminium alloy Environmental Chemistry General Agricultural and Biological Sciences |
| Zdroj: | International Journal of Environmental Science and Technology. 12:2299-2306 |
| ISSN: | 1735-2630 1735-1472 |
| Popis: | The nickel–copper alloy (70:30) prepared by metallurgical route is currently employed in marine environments because of its good resistance to corrosion. This alloy forms a thin protective surface layer when exposed to marine atmosphere and thus provides its corrosion resistance. Electrodeposition of nickel–copper alloy from sulphamate acetate-based electrolyte is a new and novel approach and was experimented. The detailed study was performed on the effect of electrolyte composition, current density and pH on the preparation of alloy deposit; the prepared alloy deposit particle size is of 78 nm, and the surface morphology of the alloy deposit was characterized with X-ray diffraction, scanning electron microscopy, EDAX, and atomic force microscope. Nickel–copper alloy deposited from the sulphamate acetate-based electrolyte operated at a temperature of 30 °C, with a pH of 6.6 and at 3 A/dm2, produces nickel–copper (70:30) alloy deposit. The corrosion behaviour of this alloy deposit was studied by potentiodynamic polarization method; the corrosion current of nickel is 8.67 μA cm−2 and the nickel–copper alloy is 2.65 μA cm−2. |
| Databáze: | OpenAIRE |
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