Electrodeposition Obtaining and Corrosion Behaviour of Phenol Formaldehyde Resin/Zinc Composite Coatings

  • Olga MITOŞERIU "Dunarea de Jos" University of Galati, Romania
  • Alina CIUBOTARIU "Dunarea de Jos" University of Galati, Romania
  • Lidia BENEA "Dunarea de Jos" University of Galati, Romania
  • Pierre PONTHIAUX Ecole Centrale Paris, France
  • Francois WENGER Ecole Centrale Paris, France
Keywords: PF resin particles, electrodeposition, PF resin/Zn composite coatings, thickness layers, polarization resistance

Abstract

The present work has the purpose of obtaining composite coatings in zinc matrix by using phenol - formaldehyde resin type NOVOLAC (RESITAL 6358/1) in the electrodeposition process of zinc. The PF resin/Zn composite coatings were electrodeposited from a suspension of PF resin particles (diameter < 56 μm) in aqueous zinc sulphate electrolyte. Suspension was prepared by adding 10 g/L and 25 g/L PF resin particles into solution. The pure zinc coating has a rather regular surface, whereas the composite coatings surface has fine surface structure. For layers obtained at 3 A/dm2 the polarization resistance is higher for composite coatings with 10 g/L PF resin (Rp = 238.75 Ω cm2) than pure zinc (Rp = 34.54 Ω cm2). For layers obtained at 5 A/dm2 the polarization resistance is higher for composite coatings with 25 g/L PF resin (Rp = 430.19 Ω cm2) than pure zinc (Rp = 127.34Ω cm2). As test solution 0.5 M sodium chloride was used, it was observed that by adding PF resin particles in zinc electrolyte for electrodeposition it was obtained a very good distribution of resin particles on zinc surface and PF resin/Zn composite coatings obtained are most resistant at corrosive attack than pure zinc obtained from electrodeposition under the same conditions.

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Fascicle_9_2_2008
Published
2008-11-15
How to Cite
1.
MITOŞERIU O, CIUBOTARIU A, BENEA L, PONTHIAUX P, WENGER F. Electrodeposition Obtaining and Corrosion Behaviour of Phenol Formaldehyde Resin/Zinc Composite Coatings. The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science [Internet]. 15Nov.2008 [cited 28Apr.2024];31(2):97-02. Available from: https://www.gup.ugal.ro/ugaljournals/index.php/mms/article/view/3110
Issue
Vol 31 No 2 (2008)
Section
Articles

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