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2018-06-28 - Colloque/Présentation - poster - Anglais - 1 page(s)

Rodriguez Justine , Bollen Estelle, Nguyen Thuy Duong, Paint Yoann, Olivier Marie-Georges , "Development of a self-healing coating for the corrosion protection of Zn-Mg coated steel" in SMT32 - 32nd International Conference on Surface Modification Technologies, San Sebastian, Espagne, 2018

  • Codes CREF : Corrosion des matériaux (DI2114)
  • Unités de recherche UMONS : Science des Matériaux (F502)
  • Instituts UMONS : Institut de Recherche en Science et Ingénierie des Matériaux (Matériaux)
  • Centres UMONS : Ingénierie des matériaux (CRIM)
Texte intégral :

Abstract(s) :

(Anglais) DEVELOPMENT OF A SELF-HEALING COATING FOR THE CORROSION PROTECTION OF ZN-MG COATED STEEL J. Rodrigueza*, E. Bollena, D. T. Nguyena,b, Y. Paintc, M.-G. Oliviera,c a Faculty of Engineering, University of Mons, Rue de l’Epargne, 56, 7000 Mons, Belgium b Institute for Tropical Technology, Vietnam Academy of Science and Technology, Vietnam c Materia Nova ASBL, Avenue Copernic, 1, 7000 Mons, Belgium _________________________________________________________________________________________________________________________________ Abstract Zinc coated steel is largely used in wide range of industries such as automotive or household appliances due to its high corrosion resistance. However, the sensitivity of zinc to aggressive environments, the intensive consumption of zinc and the increase in coating price are so many factors that are limiting the use of zinc coatings. New coatings formulations applied on steel have consequently been developed for some years in order to reduce the consumption of zinc and its cost in coatings. Several studies have shown that the addition of magnesium into the metallic coating allows to improve corrosion resistance in atmospheric conditions. However the Zn-Mg coatings applied on steel remain critically reactive in immersion due to a high dissolution rate of magnesium1. Benzotriazole (BTAH) has recently been proved to be efficient for the corrosion inhibition of Zn-Mg coated steel (ZM)2. The objective of the present work is to develop an anti-corrosion system for ZM surface. Layered double hydroxide modified with benzotriazole (LDH-BTAH) was synthetized using the coprecipitation method. The nanocontainers morphology and properties were characterized by means of infrared spectroscopy, X-ray diffraction and surface charge measurements. The nanocontainers were incorporated inside an epoxy coating and the dispersion and application parameters were optimized. 1 J. Rodriguez et al., Effect of the electrolyte pH on the corrosion mechanisms of Zn-Mg coated steel Corrosion Science 108 (2016) 42-59 2 J. Rodriguez et al., Study of the inhibition ability of benzotriazole on the Zn-Mg coated steel corrosion in chloride electrolyte, Corrosion Science (2017), https://doi.org/10.1016/j.corsci.2017.12.025