Effect of organic precursor in hybrid sol–gel coatings for corrosion protection and the application on hot dip galvanised steel
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2019-01-15
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Abstract
Sol-gel coating material with enhanced corrosion protection for zinc-coated steel has been obtained through the incorporation of mono-phenol and bi-phenol organic precursors in an epoxide functionalised-silica-zirconia matrix. The effect of the presence of the organic precursors in the baseline formulation has been studied; sol stability has been examined by viscosity evolution; gel densification stage has been studied by differential scanning calorimetry (DSC); material composition has been analysed by Fourier transform infrared spectroscopy (FTIR) and X-ray spectroscopy (XPS); coating thickness and roughness has been measured by profilometry. Corrosion performance in three artificial weathering tests showed outstanding performance in the delay of zinc and steel corrosion products emergence, and electrochemical impedance spectroscopy (EIS) measurement permitted the identification of the coating presenting the most promising properties in terms of corrosion protection. Developed coatings have shown outstanding contribution to service life extension of zinc-coated parts.
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Publisher Copyright: © 2018, Springer Science+Business Media, LLC, part of Springer Nature.
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Galvanised steel , Corrosion protection , Hybrid sol–gel coating , Zirconium , Bisphenol A , Allyl-phenol , Galvanised steel , Corrosion protection , Hybrid sol–gel coating , Zirconium , Bisphenol A , Allyl-phenol , Electronic, Optical and Magnetic Materials , Ceramics and Composites , General Chemistry , Biomaterials , Condensed Matter Physics , Materials Chemistry , Funding Info , The authors thank the support of the Basque Government for EMAITEK 2017 program and the ELKARTEK project NG-FAB16 (contract number KK2016-00025). The authors thank CIC BiomaGUNE and Luis Yate for XPS characterisation. , The authors thank the support of the Basque Government for EMAITEK 2017 program and the ELKARTEK project NG-FAB16 (contract number KK2016-00025). The authors thank CIC BiomaGUNE and Luis Yate for XPS characterisation.
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Agustín-Sáenz , C , Martín-Ugarte , E , Jorcin , J B , Imbuluzqueta , G , Santa Coloma , P & Izagirre-Etxeberria , U 2019 , ' Effect of organic precursor in hybrid sol–gel coatings for corrosion protection and the application on hot dip galvanised steel ' , Journal of Sol-Gel Science and Technology , vol. 89 , no. 1 , pp. 264-283 . https://doi.org/10.1007/s10971-018-4840-6