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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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Bordo, Kirill
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Publications (17/17 displayed)
- 2018Electrochemical profiling of multi-clad aluminium sheets used in automotive heat exchangerscitations
- 2018Electrochemical profiling of multi-clad aluminium sheets used in automotive heat exchangerscitations
- 2017Steam based conversion coating on AA6060 alloy: Effect of sodium silicate chemistry and corrosion performancecitations
- 2016Band gap tuning of amorphous Al oxides by Zr alloyingcitations
- 2016High frequency pulse anodising of magnetron sputtered Al–Zr and Al–Ti Coatingscitations
- 2015Accelerated growth of oxide film on aluminium alloys under steam: Part II: Effects of alloy chemistry and steam vapour pressure on corrosion and adhesion performancecitations
- 2015Effect of High Frequency Pulsing on the Interfacial Structure of Anodised Aluminium-TiO2citations
- 2015High Frequency Anodising of Aluminium-TiO2 Surface Compositescitations
- 2015Friction stir processed Al-TiO 2 surface composites:DC vs. High frequency pulse and pulse reverse anodising
- 2015High frequency anodising of aluminium–TiO2 surface composites: Anodising behaviour and optical appearancecitations
- 2015Effect of High Frequency Pulsing on the Interfacial Structure of Anodized Aluminium-TiO2citations
- 2015High frequency anodising of aluminium-TiO 2 surface composites:Anodising behaviour and optical appearancecitations
- 2015Effect of High Frequency Pulsing on the Interfacial Structure of Anodised Aluminium-TiO 2citations
- 2014Optical appearance of AC anodized Al/TiO 2 composite coatings
- 2014Microstructure and optical appearance of anodized friction stir processed Al - Metal oxide surface composites
- 2014Electrochemical profiling of multi-clad aluminium sheets used in automotive heat exchangers
- 2014Optical appearance of AC anodized Al/TiO2 composite coatings
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document
Electrochemical profiling of multi-clad aluminium sheets used in automotive heat exchangers
Abstract
The objective of the present study is to understand the mechanisms of corrosion propagation across the multi-clad structure of Al alloys sheets as a function of local alloy composition and microstructure, with and without brazing treatment. Electro-chemical behaviour at different depths was profiled using a combination of glow dis-charge optical emission spectroscopy (GDOES) sputtering, localized potentiodynam-ic polarization and zero resistance ammetry (ZRA) measurements. Multi-clad struc-ture used was a four layer sandwich consisting of a copper-containing AA3xxx long-life core alloy, AA4343 brazing clad on both sides and a copper-free AA3xxx interlay-er on the air-side of the sandwich sheet. The polarization behaviour of both as-rolled and brazed materials (i.e. corrosion potential, pitting potential, cathodic and anodic reactivities) was determined as a function of depth using a localized electrochemical cell and GDOES sputtering. Galvanic corrosion behaviour of individual cladding lay-ers was studied by ZRA in a conventional electrochemical cell. The changes in the microstructure of the material caused by the brazing process were investigated by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). The observed evolution of the electrochemical parameters throughout the ma-terial depth was analysed and correlated to the respective microstructural features. The obtained results were compared to those obtained for a conventional, three-layer long-life alloy product.