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Corrosion behavior of carbon steel coated with magnesium electrodeposited from methyl magnesium chloride solution

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Abstract

Magnesium coating was electroplated on carbon steel to improve its corrosion protection. The analytical characterization of the magnesium coating was performed by scanning electron spectroscopy and energy dispersive X-ray spectroscopy. The electrochemical behavior of Mg-coated carbon steel was assessed by electrochemical impedance spectroscopy, open-circuit potential measurements and potentiodynamic polarization curves in 0.03% sodium chloride solution. The electrochemical results showed that the self-corrosion current density (i corr) of magnesium-coated steel was 0.32 mA cm−2 (about 1.8% of that of uncoated steel). Impedance results showed an increase of the total impedance when magnesium coating was applied on steel substrate. The corrosion protection was ensured by a two-step mechanism. The first step was cathodic polarization; the second step was the formation of a barrier due to magnesium oxides composed of MgO, Mg(OH2) and Mg(OH3)Cl.

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Acknowledgements

The authors would like to acknowledge the financial support provided by “Action Intégrée Franco-Tunisienne du Ministère des Affaires Etrangères et Européennes français et du Ministère de l’Enseignement Supérieur, de la Recherche Scientifique et de la Technologie tunisien”.

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Authors and Affiliations

  1. Unité de Recherche Corrosion & Protection des Métalliques, ENIT, BP 37, Tunis-Belvédère, Tunisia

    Samia Ben Hassen & Ezzeddine Triki

  2. Laboratoire Traitement et Recyclage des Eaux, CERTE, Borj Cedria, Tunisia

    Latifa Bousselmi

  3. Institut UTINAM, CNRS UMR 6213, Université de Franche-Comté, 16 Route de Gray, 25030, Besançon Cedex, France

    Samia Ben Hassen, El Mustafa Rezrazi & Patrice Berçot

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  1. Samia Ben Hassen
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  2. Latifa Bousselmi
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  3. El Mustafa Rezrazi
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  4. Patrice Berçot
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  5. Ezzeddine Triki
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Correspondence to Samia Ben Hassen.

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Hassen, S.B., Bousselmi, L., Rezrazi, E.M. et al. Corrosion behavior of carbon steel coated with magnesium electrodeposited from methyl magnesium chloride solution. J Coat Technol Res 10, 277–284 (2013). https://doi.org/10.1007/s11998-012-9436-4

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  • DOI: https://doi.org/10.1007/s11998-012-9436-4

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