Article
Version 1
Preserved in Portico This version is not peer-reviewed
The Role of APTES as a Primer for Polystyrene Coated AA2024-T3
Version 1
: Received: 15 December 2023 / Approved: 15 December 2023 / Online: 15 December 2023 (08:31:32 CET)
A peer-reviewed article of this Preprint also exists.
Halford, J., IV; Chen, C.-F. The Role of APTES as a Primer for Polystyrene Coated AA2024-T3. Micromachines 2024, 15, 93. Halford, J., IV; Chen, C.-F. The Role of APTES as a Primer for Polystyrene Coated AA2024-T3. Micromachines 2024, 15, 93.
Abstract
The silane (3-Aminopropyl)triethoxysilane (APTES), possesses one terminal amine group and three ethoxy groups extending from each silicon atom, serving as a crucial interface adherent between organic and inorganic materials. In corrosion prevention, APTES is frequently employed as a primer, with subsequent topcoat as an extra protective layer. This topcoat is particularly useful in covering sites where APTES may exhibit poor bonding, such as those involving Cu or Cu-rich alloying elements. In our study, we applied a thin layer of APTES to cleaned AA2024-T3 samples using concentrated vapor deposition, followed by spin-coating with a diluted PS/acetone solution. Through combinatorial experimentation, we investigated the impact of APTES on the corrosion resistance of the coating system on AA2024-T3. Our findings indicate that a higher surface energy of the APTES primer contributes to better corrosion resistance in the overall coating system. This improvement can be attributed to enhanced wettability achieved by the PS/acetone solution on the cured APTES primer, leading to a more uniform coverage of the dried PS topcoat. Additionally, our research revealed that, in the early stages of exposure to the corrosion solution, a thinner APTES primer enhances protection against corrosion. This effect is attributed to hydrolytic stability mechanisms, and the interactions between hydrolyzation/condensation in soaked APTES and the dissolution of naturally formed aluminum oxide pre-existing in the bare samples. Finally, we observed that an APTES primer subjected to additional heat treatment before topcoating exhibits superior performance in corrosion resistance.
Keywords
vapor deposition; coating; primer; polystyrene; APTES; silanes; AA2024-T3; corrosion; electrochemical impedance spectroscopy; NaCl
Subject
Chemistry and Materials Science, Surfaces, Coatings and Films
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Comments (0)
We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.
Leave a public commentSend a private comment to the author(s)
* All users must log in before leaving a comment
