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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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Prosek, Tomas
University of Chemistry and Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (6/6 displayed)
- 2024Application of flexible resistometric sensors for real-time corrosion monitoring under insulationcitations
- 2021Optimization of Metallographic Sample Preparation for AFM/SKPFM Based Phase Distinction of Complex and Dual Phase High Strength Steelscitations
- 2021Simplified approach to assess water uptake in protective organic coatings by parallel plate capacitor methodcitations
- 2019The effect of microstructure on hydrogen permeability of high strength steelscitations
- 2018Corrosion resistance of stainless steel in drinking water treatment plants and water storage unitscitations
- 2016Investigation into the Corrosion Mechanisms and Effective Inhibitor Additions for Zinc-Magnesium-Aluminium (ZMA) Alloyscitations
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document
Investigation into the Corrosion Mechanisms and Effective Inhibitor Additions for Zinc-Magnesium-Aluminium (ZMA) Alloys
Abstract
The use of zinc-magnesium-aluminium (ZMA) alloys is increasing in popularity within the coated steel industry due to the potential advantages it can offer. As such, a collaboration of work involving three differing ZMA alloy coated steels were studied using the scanning vibrating electrode technique (SVET) and novel in situ time-lapse optical microscopy whilst immersed in a 1% NaCl electrolyte, facilitating the investigation of each microstructure. The collation of data demonstrated preferential corrosive attack of the eutectic phases amongst each of the alloy compositions, and more specifically the MgZn2 lamellae, succeeded by the corrosion of Zn-rich dendrites.The use of SVET enabled an estimation of mass loss from each alloy, and when correlated with the time-lapse data, revealed a reduction in magnitude of corrosion with increasing content of Mg and Al alloy additions. The improvement in corrosion performance was likely a result of increased levels of both MgO and Al2O3 existing at the alloy surface, thereby restraining the corrosion event kinetics. A corrosion inhibitor in the form of Na3PO4 introduced to 1% NaCl electrolyte at varying concentrations exhibited marked effects on the corrosion of the selected ZMA alloy, as evidenced by both SVET and time-lapse microscopy data sets.Approximations based on the measured SVET data showed that sodium phosphate additions diminished the corrosion activity, the extent of which was dependant on the chosen concentration. The time-lapse images establish suitable correlation with the estimated mass loss results at pH 7, whereby images indicated phosphate precipitation at anodic sites, and thus their passivation. Based on these observations, it can be realised that sodium phosphate inhibitor additions have an appreciable effect on corrosion behaviour within this particular alloy system.