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- Publisher
- Emerald Publishing
- Copyright
- © Emerald Publishing Limited
- ISSN
- 0003-5599
- DOI
- 10.1108/acmm-08-2018-1988
- Publisher site
- See Article on Publisher Site
Abstract
The purpose of this paper is to improve binding force between the coating and the steel substrate by using chemical modification on the steel surface; at the same time, it can also increase the corrosion resistance of the coating.Design/methodology/approachThe main components of the conversion film include tannic acid, sodium molybdate and silane coupling agent KH560. After the preparation was completed, the samples were tested and analyzed, including surface morphology, conversion film components, bonding force with organic resins and corrosion resistance. Finally, it drew a conclusion that the conversion film can greatly improve the bonding strength of the steel substrate and epoxy resin.FindingsWhen the content of tannic acid is 4 g/L meanwhile the content of KH560 is 20 g/L, the conversion film has the strongest binding force with epoxy resin, from 2.15 Mpa of untreated steel to 4.60 Mpa, growth of 140 per cent. At the same time, the resulting conversion film also improves the corrosion resistance of the steel surface by a small margin.Originality/valueA method of enhancing the bond between an epoxy coating and steel is provided. Verify the mechanism of this method.
Journal
Anti-Corrosion Methods and Materials – Emerald Publishing
Published: Aug 9, 2019
Keywords: Corrosion resistance; Epoxy resin; Chemical conversion film; Coating adhesion