MUSSA, Magdi, TAKITA, Sarra, ZAHOOR, Deeba, LEWIS, Oliver and FARMILO, Nick (2021). Study the effect of adding Oleic acid to reduce the medium diffusion in pores of hybrid silica-based sol-gel coatings. In: The 2nd International Online Conference on Polymer Science - Polymers and Nanotechnology for Industry 4.0, Basel, Switzerland, 1-15 Nov 2021. sciforum-MDPI.
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Mussa-StudyEffectAdding(VoR).pdf - Published Version
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Mussa-StudyEffectAdding(VoR).pdf - Published Version
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Abstract
Due to the wide-ranging of preservative surfaces applications, there is a need for a funda- 17
mental understanding of not only how to produce such exceptional surfaces but also to know how 18
specific surface properties affect coatings pore wettability, for example, morphology and chemical 19
comprehending. Silica-based hybrid coatings as advanced hybrid polymers have been shown to 20
exhibit excellent chemical stability with a chance to be functionalised combined with reducing the 21
corrosion of metal substrates. However, research shows that sol-gel only has some limitations in 22
terms of anti-corrosive properties due to the high porosity. Therefore, this work will report the pre- 23
liminary performance of the diffusion prevention in a silica-based hybrid sol-gel coating that has 24
been enhanced by adding Oleic acid (OA) to the sol-gel formula. The evaluation of the effect of the 25
adsorption mechanism of OA on aluminium alloys surface was studied based upon using infrared 26
analysis (FTIR) as a non-destructive test separately. The chemical confirmation of adding OA to Sol- 27
gel was done by infrared spectroscopy (ATR-FTIR) and supported by analysing the morphology of 28
the surface by using scanning electron microscopy (SEM) and water contact angle test (WCA). Fur- 29
thermore, the coatings’ corrosion performances were studied using electrochemical impedance 30
spectroscopy (EIS) and Potential-dynamic polarisation scanning (PDPS). As a result, the Oleic acid 31
- silica-based hybrid coating exhibited exceptional functionalised pore-blocking, hydrophobic and 32
anti-corrosion properties, providing mimicked active protection on the aluminium alloy 2024-T3 33
samples compared to sol-gel-only and non-coated samples.
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