IEC 189 |
| Chenggang Chen1, Mohammad Khobaib1, and David Curliss2. (1) Nonmetallic Division, University of Dayton Research Institute, 300 College Park Avenue, Dayton, OH 45469-0168, (2) Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, OH 45433 |
| The current corrosion protection requirements of aircraft coating systems are more demanding. Simultaneously, there is increased pressure to eliminate the use of chromates, which is a known carcinogen. This study is part of developing environmentally benign alternatives to chromates where the anticorrosion protection property of the primer polymer is expected to improve by developing epoxy layered-silicate nanocomposites. The epoxy resin used is Epon 828/Epi-Cure curing agent 8290-Y-60 and Epon 828/Jeffamine D400. The morphology of the nanocomposites was characterized by the wide-angle x-ray diffraction, small-angle x-ray scattering and transmission electron microscopy. The coatings of nanocomposites on Al were evaluated by potentiodynamic polarization and electrochemical impedance spectroscopy. There is some improvement in the anticorrosion properties for the exfoliated SC18/Epon 828/D400 nanocomposite coatings, and almost no improvement for the intercalated organoclay/Epon 828/Y-60 nanocomposite. This is perhaps related to the better dispersion of silicate nanosheet in the epoxy matrix for SC18/Epon 828/D400 nanocomposite. |
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Nanotechnology and the Environment
8:30 AM-11:55 AM, Wednesday, March 26, 2003 Convention Center -- Room 392, Oral
Division of Industrial and Engineering Chemistry |