1. Improving the Corrosion Performance of Organically Coated Steel Using a Sol–Gel Overcoat.
- Author
-
Watkins, Evan, Griffiths, Chris M., Richards, Calvin A. J., Potts, Sarah-Jane, Batchelor, Chris, Barker, Peter, Searle, Justin, and Jewell, Eifion
- Subjects
CORROSION resistance ,STEEL ,STEEL corrosion ,SURFACE coatings ,EPOXY coatings ,ETHYL silicate - Abstract
Organically coated steels are widely used in applications in which they are subjected to the natural environment and therefore require excellent corrosion resistance. Organic clearcoats are typically employed as a barrier that improves the overall corrosion resistance; however, they are typically derived from fossil fuel-based feedstock. A more sustainable alternative could be possible using sol–gel coatings. The application of a simple tetraethoxysilane (TEOS)-based sol–gel was applied to polyurethane-coated steels using a spray coater. The concentration of TEOS was altered to produce coatings containing either 2.5% or 10%. The 10% TEOS resulted in dense, homogeneous coatings that offered a significant improvement in corrosion resistance compared to an uncoated substrate. Whereas the 2.5% TEOS coatings were inhomogeneous and porous, which indicated a limitation of concentration required to produce a uniform coating. The successful demonstration of using a simple TEOS-based coating to improve the corrosion resistance of organically coated steel highlights the potential for further investigation into the use of sol–gels for these applications. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF