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Laser Surface Modification and Galvanic Protection of 5XXX

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-20-C-0346
Agency Tracking Number: N18A-016-0148
Amount: $999,997.00
Phase: Phase II
Program: STTR
Solicitation Topic Code: N18A-T016
Solicitation Number: 18.A
Solicitation Year: 2018
Award Year: 2020
Award Start Date (Proposal Award Date): 2020-04-27
Award End Date (Contract End Date): 2022-05-01
Small Business Information
301 1st Street SW Suite 200
Roanoke, VA 24011
United States
DUNS: 627132913
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Adam Goff
 Principal Investigator
 (434) 220-2513
Business Contact
 Michael Pruzan
Phone: (540) 769-8430
Research Institution
 The Rector and Visitors of the University of Virginia
 Ms. Ruthanne Porreca Ms. Ruthanne Porreca
Carruthers Hall 1001 Emmet Street North, Second Floor
Charlottesville, VA 22903
United States

 (434) 297-7402
 Nonprofit College or University

Exfoliation corrosion of 5XXX series aluminum alloy is an issue related to sensitization of the aluminum substrate wherein internal stresses drive delamination of highly elongated outer layers due to preferential corrosion paths and volumetric expansion. The Navy is interested in preventing this corrosion to decrease lifetime costs on Littoral Combat Ships, Ship-to-Shore Connector vessels, and Ticonderoga class ships. In Phase I, Luna investigated and demonstrated feasibility of using a laser surface modification (LSM) treatment on the surface of the aluminum in order to reduce exfoliation corrosion LSM processed coupons exhibited reduced exfoliation corrosion susceptibility as demonstrated via potentiodynamic electrochemical testing, ASTM G66 ASSET exfoliation testing, ASTM G67 Nitric Acid Mass Loss Testing (NAMLT), and via in-situ stress-corrosion cracking (SCC) testing. In Phase II, Luna will scale up the treatment technology further using higher power laser components. Luna will assess 5XXX coupons using several techniques, including traditional accelerated corrosion testing (ASTM B117, ASTM G85-A5, GMW 14872), ASTM G47, ASTM G66, SEM/EDS analysis, and corrosion modeling. Luna will develop an integrated solution using available laser modules coupled with robotics to ensure consistent and repeatable processing.

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

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