Release studies of corrosion inhibitors from cerium titanium oxide nanocontainers |
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Authors: | Evaggelos D Mekeridis Ioannis A Kartsonakis George S Pappas George C Kordas |
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Institution: | (1) Sol-Gel Laboratory, Institute of Materials Science, NCSR “DEMOKRITOS”, 153 10 Agia Paraskevi Attikis, Greece; |
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Abstract: | Cerium titanium oxide nanocontainers were synthesized through a two-step process and then loaded with corrosion inhibitors
2-mercaptobenzothiazole (2-MB) and 8-hydroxyquinoline (8-HQ). First, polystyrene nanospheres (PS) were produced using polymerization
in suspension. Second, the PS spheres were coated via the sol–gel method to form a cerium titanium oxide layer. Finally, the
nanocontainers were made by calcination of the coated PS nanospheres. The size of the containers was 180 ± 10 nm as determined
by Scanning Electron Microscopy (SEM). X-Ray Diffraction Analysis (XRD) showed that the nanocontainers consist of anatase
and cerianite crystalline phases. The presence and loading of the inhibitors in the nanocontainers was confirmed with Fourier
Transform Infrared Spectroscopy (FT–IR) and Thermo Gravimetric Analysis (TGA), respectively. TGA revealed the amount of 10.43
and 4.61% w/w for 2-MB and 8-HQ in the nanocontainers, respectively. Furthermore, the release kinetics of the inhibitors from
the nanocontainers was studied in corrosive environment using electrochemical impedance spectroscopy (EIS) in the presence
of aluminum alloys 2024-T3 (AA2024-T3). |
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