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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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Pardo, A.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (22/22 displayed)
- 2023Advanced characterization and optical simulation for the design of solar selective coatings based on carbon: transition metal carbide nanocomposites
- 2019Advanced characterisation and optical simulation for the design of solar selective coatings based on carbon:transition metal carbide nanocompositescitations
- 2019Solar selective coatings based on carbon:transition metal nanocomposites
- 2018Role of particle type and concentration on characteristics of PEO coatings on AM50 magnesium alloycitations
- 2017Influence of sealing post-treatments on the corrosion resistance of PEO coated AZ91 magnesium alloycitations
- 2017Corrosion and wear of PEO coated AZ91/SiC compositescitations
- 2017Corrosion of Mg-9Al alloy with minor alloying elements (Mn, Nd, Ca, Y and Sn)citations
- 2017Corrosion of Mg-9Al alloy with minor alloying elements (Mn, Nd, Ca, Y and Sn)citations
- 2016Role of PEO coatings in long-term biodegradation of a Mg alloycitations
- 20163D study of intermetallics and their effect on the corrosion morphology of rheocast aluminium alloycitations
- 2016Advanced characterization and optical simulation for the design of solar selective coatings based on carbon: transition metal carbide nanocompositescitations
- 2015Enhanced corrosion resistance of AZ91 alloy produced by semisolid metal processingcitations
- 2015Characterization and corrosion behaviour of PEO coatings on AM50 magnesium alloy with incorporated particles
- 2015PEO of pre-anodized Al-Si alloyscitations
- 2015PEO of pre-anodized Al–Si alloys: Corrosion properties and influence of sealingscitations
- 2015PEO of pre-anodized Al-Si alloys:Corrosion properties and influence of sealingscitations
- 2014Microstructure and corrosion behaviour of A356 aluminium alloy modified with Ndcitations
- 2014Energy-efficient PEO process of aluminium alloyscitations
- 2013Pitting corrosion of rheocast A356 aluminium alloy in 3.5wt.% NaCl solutioncitations
- 2012Influence of Gd on the corrosion behavior of AM50 and AZ91D magnesium alloyscitations
- 2012Friction and wear behavior of plasma assisted chemical vapor deposited nanocomposites made of metal nanoparticles embedded in a hydrogenated amorphous carbon matrixcitations
- 2010Electrochemical Estimation of the Corrosion Rate of Magnesium/Aluminium Alloyscitations
Places of action
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article
Influence of sealing post-treatments on the corrosion resistance of PEO coated AZ91 magnesium alloy
Abstract
The effect of three different post-treatments carried out on Plasma Electrolytic Oxidation (PEO) coated magnesium alloys are evaluated in terms of characterisation and corrosion resistance. Special interest is given to the role of a common additive (NaF) to the coating properties. The post–treatments are based on immersion sealing processes in aqueous solutions of inorganic salts (cerium and stannate based salts) and alcoholic solution of an organic acid (octodecylphosphate acid, ODP). Sealing mechanisms for each post-treatment are proposed. Cerium and stannate sealings are based on filling of the pores with the products of dissolution/precipitation reactions, while the ODP acid sealing is based on the formation of a thin layer of ODP over the coating through specific interactions between the polar part of the organic acid and the coating surface. All coatings are evaluated by salt fog test and analysed by electrochemical impedance spectroscopy. All sealings show a slight increase in the corrosion resistance of the coatings formed in the NaF-free electrolyte, but their positive influence is boosted in case of the coatings obtained in the NaF-containing electrolyte. This is related to the chemical and morphological changes at the coating surface induced by the presence of NaF in the electrolyte.