Release behavior of pH sensitive microcapsules containing corrosion inhibitor
| Autor: | Niteen Jadhav, Kiran B. Kashi, Mark B. Jensen, Victoria J. Gelling, Takeshi Matsuda |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
General Chemical Engineering chemistry.chemical_element 02 engineering and technology Electrolyte 010402 general chemistry 01 natural sciences Metal Corrosion inhibitor chemistry.chemical_compound Hydrolysis Aluminium Materials Chemistry fungi Organic Chemistry Substrate (chemistry) 021001 nanoscience & nanotechnology 0104 chemical sciences Surfaces Coatings and Films Cerium nitrate Cerium chemistry Chemical engineering visual_art visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Progress in Organic Coatings. 132:9-14 |
| ISSN: | 0300-9440 |
| DOI: | 10.1016/j.porgcoat.2019.03.032 |
| Popis: | A pH sensitive microcapsule (pH-MC) which can be decomposed in corrosive environments on metal substrates was synthesized and its release behavior was investigated. Ester chains which can be hydrolyzed under both alkaline and acidic conditions were successfully introduced into the shell wall of the pH-MC. In separate sets of experiments, cerium nitrate was encapsulated as a corrosion inhibitor, whereas aluminum nitrate was used to investigate the release property due its amphoteric nature. Study of the release behavior with the aluminum nitrate-containing pH-MC (Al-MC) demonstrated that the Al-MCs are sensitive to acidic and basic environments and are inactive in neutral environments. It was also found that hydrolysis of the ester chains occurred prior to release of the core materials. When immersed in an electrolyte with the cerium nitrate-containing pH-MC (Ce-MC), the open circuit potential (OCP) of a steel substrate showed a nobler potential than when immersed in an electrolyte without Ce-MC. |
| Databáze: | OpenAIRE |
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