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Improving the Processability of a One-Step Hydrophobic Coating for Hot-Dipped Galvanised Steel for Industrial Applications
Coatings, Volume: 12, Issue: 7, Start page: 895
Swansea University Authors: Jamie Williams, Chris Griffiths, Tom Dunlop , Eifion Jewell
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DOI (Published version): 10.3390/coatings12070895
Hydrophobicity on steel-based metallic surfaces provides an advantage in limiting corrosion and debris buildup on the surface, thereby, improving the substrate performance. An experimental investigation was conducted on the development of zinc stearate and silicon dioxide coatings on the surface of...
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Hydrophobicity on steel-based metallic surfaces provides an advantage in limiting corrosion and debris buildup on the surface, thereby, improving the substrate performance. An experimental investigation was conducted on the development of zinc stearate and silicon dioxide coatings on the surface of hot-dipped galvanised zinc-coated steel substrates, which could be used to induce superhydrophobicity. Under optimal formulation and processing conditions, a contact angle of 146° could be produced within a 120-min processing window. This represents a reduction in processing time of 67% over previous literature using similar chemistry. In addition, we proved that costly nano silicon dioxide can be replaced by lower cost micro silicon dioxide without decreasing the performance of the coating contact angle. Under standard accelerated exposure tests, the coating was shown to reduce oxide build up by a factor of 3 compared to uncoated galvanized steel.
Data Availability Statement: The data used to support the findings of this study are included withinthe article and are available from the corresponding author upon request.
Faculty of Science and Engineering
The authors would like to acknowledge the COATED M2A funding from the European Social Fund via the Welsh Government (WEFO), the EPSRC (through UKRI) (EP/S515218/1) and Tata Steel Europe that has made this research possible.