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2018-09-10 - Colloque/Présentation - communication orale - Anglais - 1 page(s)

Ooi Ran Dy , Poorteman Marc , Fedel M., Olivier Marie-Georges , "Corrosion performance of a hybrid sol-gel coating on HDG steel modified with colloidal silica and disodium sebacate" in EUROCORR2018 - The Annual Congress of the European Federation of Corrosion, Krakow, Poland, 2018

  • Codes CREF : Chimie des surfaces et des interfaces (DI1327), Enseignement des sciences de l'ingénieur (DI0132)
  • 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)

Abstract(s) :

(Anglais) Hybrid sol-gel coatings are considered as environmental friendly surface treatments, promoting adhesion between metal substrates and organic coatings. However, this kind of coatings often provides insufficient corrosion protection to the substrate. Modification of coatings by doping with various nano-fillers and additives is proven to be an effective way to improve corrosion properties. In the present work, the effect of doping of hybrid tetraethylorthosilicate–(3-glycidyloxypropyl)trimethoxysilane (TEOS-GPTMS) coatings with colloidal silica and disodium sebacate via an one-pot sol-gel synthesis route was investigated before and after application by dip coatingon HDG steel.. Indeed, little is reported about the effect of both of these additives on the structure and corrosion performance of hybrid coating. After optimization of the synthesis conditions, the coatings were characterised using Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectrometry (FT-IR), and water contact angle analysis. Finally, the corrosion performance of the coatings has been evaluated using Electrochemical Impedance Spectroscopy (EIS) versus immersion time in a 0.1 M NaCl solution. The results show that the hybrid coatings with an optimum amount of colloidal silica have improved barrier properties. The hybrid coating containing additional disodium sebacate showed further improved corrosion protection properties in EIS measurements, indicating a considerable film stabilization effect of this additive.

(Anglais) Hybrid sol-gel coatings are considered as environmental friendly surface treatments, promoting adhesion between metal substrates and organic coatings. However, this kind of coatings often provides insufficient corrosion protection to the substrate. Modification of coatings by doping with various nano-fillers and additives is proven to be an effective way to improve corrosion properties. In the present work, the effect of doping of hybrid tetraethylorthosilicate–(3-glycidyloxypropyl)trimethoxysilane (TEOS-GPTMS) coatings with colloidal silica and disodium sebacate via an one-pot sol-gel synthesis route was investigated before and after application by dip coatingon HDG steel.. Indeed, little is reported about the effect of both of these additives on the structure and corrosion performance of hybrid coating. After optimization of the synthesis conditions, the coatings were characterised using Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectrometry (FT-IR), and water contact angle analysis. Finally, the corrosion performance of the coatings has been evaluated using Electrochemical Impedance Spectroscopy (EIS) versus immersion time in a 0.1 M NaCl solution. The results show that the hybrid coatings with an optimum amount of colloidal silica have improved barrier properties. The hybrid coating containing additional disodium sebacate showed further improved corrosion protection properties in EIS measurements, indicating a considerable film stabilization effect of this additive.