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

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$749,998.00
Award Year:
2005
Program:
SBIR
Phase:
Phase II
Contract:
N68335-05-C-0089
Award Id:
53552
Agency Tracking Number:
N011-0490
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
19300 Crosswind Circle, Spicewood, TX, 78669
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
033171534
Principal Investigator:
Alan Bray
President/Principal Scien
(512) 263-0822
alanbray@systemsandmaterials.com
Business Contact:
Alan Bray
President/Principal Scien
(512) 263-0822
alanbray@systemsandmaterials.com
Research Institution:
n/a
Abstract
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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