Syntheses of Novel Sol-Gel Precursor Containing Anti-corrosive Functional Group and Their Uses in Organic-Inorganic Hybrid Coatings
| Autor: | Ji Young Mang, Mi Jeong Han, Ji Yeon Seo |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Bisphenol A
Materials science Polymers and Plastics General Chemical Engineering Epoxy Electrolyte engineering.material Corrosion Dielectric spectroscopy chemistry.chemical_compound Coating chemistry Chemical engineering visual_art Materials Chemistry engineering visual_art.visual_art_medium Salt spray test Composite material Sol-gel |
| Zdroj: | Polymer Korea. 34:405-409 |
| ISSN: | 2234-8077 0379-153X |
| DOI: | 10.7317/pk.2010.34.5.405 |
| Popis: | New sol-gel precursors having the ability to protect iron against corrosion were synthesized and used to prepare organic-inorganic hybrid coatings based on epoxy. Bisphenol A epoxy was modified with 3-isocyanatopropyltriethoxysilane to improve the compatibility, and water and HCl were used as catalysts for sol-gel process. Various coating formulations were prepared depending on the type of sol-gel precursors and the amount of each ingredient, and cast on iron substrates by dip-coating and thermally cured. Corrosion protection properties of coated iron were studied by a salt spray test and electrochemical impedance spectroscopy under 0.1 M NaCl electrolyte. Hybrid coatings containing anticorrosive functional group exhibited excellent corrosion protection on iron, compared to that of typical hybrid coatings. From electrochemical impedance spectroscopy, the hybrid coatings containing anticorrosive functional group could maintaine the initial impedance after 500 h, while the impedance of hybrid coatings without them started to decrease after 24 h. |
| Databáze: | OpenAIRE |
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