KOSEN 한인과학기술자네트워크

Affordable Airframe Life Extension: Designer Corrosion Suppression Technologies Primary Sponsor: Department of Defense Deadline: 4/11/2001 KEYWORDS TECHNOLOGY AREAS: Materials / Processes OBJECTIVE: This STTR topic will seek research on corrosion prevention compounds that can be applied to aging aircraft to suppress corrosion and/or cracking and thereby extend the useful life of the airframe. The research will also include the investigation of properties of these materials relevant to space applications. DESCRIPTION: The US Air Force fleet consists of a number of aircraft that are operating at or beyond their original design lifetimes. Corrosion has been found in many of these aircraft due to the breakdown of any original protective systems that were present at the time of manufacture. This corrosion attack can dramatically impact maintenance costs, operational risks, and aircraft readiness. Currently, corrosion prevention compounds (CPCs) are often applied to repaired areas during maintenance. These materials were generally not designed specifically for suppression of corrosion, but instead have been adapted to such use. The opportunity exists to apply rational design concepts to the development of corrosion and cracking prevention compounds for aerospace use. This topic will seek research that can lead to the development of compounds whose composition and structure are tuned to be highly effective in delaying the onset of corrosion and/or in the suppression of corrosion, especially that occurring in physically occluded regions on aircraft exposed to a wide range of environments. Compounds that can suppress the propagation of cracks are also of interest. Materials to be protected include AA2024-T3, AA7075-T6, AA7178-T6, and high-strength steel. Research to further understand the material degradation behavior in these environments with a clear connection to a material development effort in a later phase is acceptable. PHASE I: Propose innovative chemical structures and/or chemical design concepts for corrosion suppression technologies for aerospace materials. Develop initial data demonstrating suppression design concepts on aerospace materials. PHASE II: Develop the proposed suppression technology and conduct appropriate testing to validate the appropriateness of the proposed chemical structures and/or chemical design concepts for corrosion suppression of aerospace materials and progress toward commercial development of these chemical structures or concepts. Assess the effectiveness of the proposed corrosion suppression technology, identify applicable application processes and intervals. PHASE III DUAL USE APPLICATIONS: Develop the proposed suppression technology and conduct appropriate testing to validate the appropriateness of the proposed chemical structures and/or chemical design concepts for corrosion suppression of aerospace materials and progress toward commercial development of these chemical structures or concepts. Assess the effectiveness of the proposed corrosion suppression technology, identify applicable application processes and intervals. REFERENCES: 1. Simon, L., Skennerton, G., Elster, J., Wickswo, J., and Kelly, R., "Quantification of Corrosion Rates in Aircraft Lap Joints Treated With Corrosion Prevention Compounds (CPC)," presented at Aging Aircraft Conference, St. Louis MO (May 2000). 2. Andy Phelps tech report on Amlguard. 3. Lunt, T.T., Brusamarello, V., Scully, J.R., and Hudson, J.L., "Interactions among localized corrosion sites investigated with electrode arrays," Electrochem. Solid State Letters 3:6, 271-274 (2000). 4. Wang, Peye-Shiang; Liang, Ming-Ru; Lee, Sheng-Long; and Lin, Jing-Chie, "Properties of Zn-Ni electrodeposition on aluminum alloys," Corros. Prev. Control 46:2, 27-31 (1999). 5. Child, T.F. and van Ooij, W.J., "Application of silane technology to prevent corrosion of metals and improve paint adhesion," Trans. Inst. Met. Finish. 77:2, 64-70 (1999). KEYWORDS: Corrosion, corrosion prevention and/or suppression, aerospace aluminum alloys. DoD Notice: Between January 2 and February 28, 2001, you may talk directly with the DoD scientists and engineers who authored the solicitation topics, to ask technical questions about the topics. The Topic Author is listed in the box below. For reasons of competitive fairness, direct communication between proposers and topic authors is not allowed after February 28, 2001, when DoD begins accepting proposals under this solicitation. TPOC: Paul Trulove PHONE: 703-696-7787 EMAIL: paul.trulove@afosr.af.mil After February 28, 2001 proposers may still submit written questions about solicitation topics through the SBIR/STTR Interactive Topic Information System (SITIS). If you have general questions about DoD SBIR program, please contact the DoD SBIR Help Desk at (800) 382-4634 or email to SBIRHELP@teltech.com. NOTE: The Solicitations listed on this site are copies from the various SBIR agency solicitations and are not necessarily the latest and most up-to-date. For this reason, you should use the agency link listed below which will take you directly to the appropriate agency server where you can read the official version of this solicitation and download the appropriate forms and rules. The official link for this solicitation is: http://www.acq.osd.mil/sadbu/sbir/sttr01/dod_sttr01.htm. DoD will begin accepting proposals on March 1, 2001. The solicitation closing date is April 11, 2001.