Sol-gel coatings provide environmentally friendly surface protection of metals and can replace toxic pre-treatments such as those based on hexavalent chromium on metal alloys. the project ultimately aims to develop silica-based organic-inorganic sol-gel derived thin film coatings possessing anti-corrosion and anti-fouling properties on aluminium alloys substrates. As with any coating, sample preparation plays a significant role in the performance of a sol-gel coating. It was, therefore, necessary to define a preparation method that combines removal of contaminants, surface roughening to improve adhesion and reproducibility. Four techniques were investigated: abrasive cleaning, acetone degreasing and cleaning with an industrial-available alkaline cleaner for 5 minutes and 30 minutes.
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The Influence of Sample Preparation Techniques on Aluminium Alloy AA2024-T3 Substrates for Sol-Gel Coating
Published: 15 October 2021 by MDPI in 2nd International Electronic Conference on Applied Sciences session Mechanical Engineering
https://doi.org/10.3390/ASEC2021-11121 (registering DOI)
Keywords: Sol-gel , sample preparation, coating, corrosion protection, and aluminuim alloy 2024-t3,