Anti-corrosive properties of an electropolymerized polymer coating on a shape memory alloy surface
- CEA-DSM/DRECAM/SRSIM, 91191 Gif-sur-Yvette (France)
Acrylonitrile electropolymerization (in an aprotic and anhydrous medium) has been used as a way to build thin, homogeneous and covering polyacrylonitrile layers grafted on the surface of usual metals and specially on copper-based shape memory alloy: Cu-Zn-Al. The results of the study first confirm the possibility of grafting thin and covering polyacrylonitrile layers on Cu-Zn-Al surface. The morphology of the films however is influenced by the geometry of the polycristalline structure of the alloy and its superficial defects. Samples obtained after grafting polyacrylonitrile films were submitted to corrosion tests based on Electrochemical Impedance Spectroscopy (EIS) measurements in a NaCl/H{sub 2}O medium. Results show that some post-treatments of the grafted films are necessary to improve their protective role, while preserving the strong interfacial bondings. Actually, thermal and mechanical cycling of the shape memory alloy covered by electropolymerized polyacrylonitrile show that the adhesion of the film is better than for simply dipped films, and thus show the relevance of grafting. {copyright} {ital 1996 American Institute of Physics.}
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 286461
- Report Number(s):
- CONF-950119-; ISSN 0094-243X; TRN: 9615M0017
- Journal Information:
- AIP Conference Proceedings, Vol. 354, Issue 1; Conference: 53. international meeting of physical chemistry: organic coatings, Paris (France), 2-6 Jan 1995; Other Information: PBD: Jan 1996
- Country of Publication:
- United States
- Language:
- English
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