Fasteners/Rivets for Watertight Integrity and Corrosion Prevention in Permanent Application

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-05-C-0089
Agency Tracking Number: N011-0490
Amount: $1,250,000.00
Phase: Phase II
Program: SBIR
Awards Year: 2005
Solicitation Year: 2001
Solicitation Topic Code: N01-022
Solicitation Number: 2001.1
Small Business Information
19300 Crosswind Circle, Spicewood, TX, 78669
DUNS: 033171534
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Alan Bray
 President/Principal Scien
 (512) 263-0822
Business Contact
 Alan Bray
Title: President/Principal Scien
Phone: (512) 263-0822
Research Institution
Wet install” rivets/fasteners use two-part sealants that are hand brushed onto the sleeve just prior to installation – associated labor and schedule costs are significant, and quality variation can be high. Rivets with a pre-applied sealant are an obvious but technically challenging solution. To get cure-in-place seals on rivets/fasteners means blocking sealant cure until installation. Cure blocking will be done by modifying AMS3281/3276 and AMS3277 sealants. Shelf plus application lifetimes are estimated at well over 1 year. Five blocking techniques will be examined and tested, along with development of a size coat to protect the cure blocked sealant from moisture and handling damage that can cause premature cure. Blocking strategies include anhydrous, microencapsulation, appending a blocking molecule that is cleaved by moisture, using a nanoclay blocking carrier, and A/B parts in nanocomposite friable shells – all with cure initiated by installation force. Non-chromate corrosion inhibitors (NCCIs) and colorants to indicate premature cure are built-in. NCCIs will be selected from state-of-the-art options proven in long term corrosion tests. Final sealant prototypes will be tested to AMS standards. A fastener manufacturer will test prototype self-seal rivets for installation and sealing, and conduct a machine design study for automating the production of self-seal rivets/fasteners.

* Information listed above is at the time of submission. *

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