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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Fonseca, António
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Publications (5/5 displayed)
- 2019Photocatalytic performance of N-doped TiO2nano-SiO2-HY nanocomposites immobilized over cotton fabricscitations
- 2019Synthesis, characterization and in vitro validation of a magnetic zeolite nanocomposite with T2-MRI properties towards theranostic applicationscitations
- 2011Comparative study of tarnishing resistance of several coloured gold based alloys
- 2009Study of a purple gold-based alloy resistance to tarnishing in a sulphuric solutioncitations
- 2009Tarnish and corrosion evaluation of a blue gold-based alloycitations
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article
Tarnish and corrosion evaluation of a blue gold-based alloy
Abstract
The use of some coloured gold alloys is dependent on the physical stability of the material when subjected to a corrosion media. This paper is concerned with the effect of two common detrimental environments (sweat and sulphuric solutions) on the stability of a blue gold-base alloy. Changes in physical properties, namely colour and brightness, were evaluated with time. It was observed that, for sulphuric solution, significant changes were obtained even for small immersion times. For the artificial sweat solution, changes occur, but the alloy is significantly more resistant. The alloy corrosion mechanisms are presented for both types of solutions. The products of corrosion were characterized by optical and SEM/EDS microscopy and by XPS spectroscopy. A comparison of the corrosion mechanisms, between the two immersion solutions, is also presented.