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GLRPPR Calendar

October 2017

Laser De-Paint and Surface Preparation Mechanism and Technologies

October 19, 2017, Time: 11 am CDT
Type: Event

This project supports SERDP's efforts to reduce Department of Defense's use of chemical conversion coatings for corrosion protection, which usually employ highly toxic chromate solutions, often hexavalent chrome type-I by developing sustainable, cost-effective technologies. Developing and transitioning new non-chemical processes for surface preparation are sought to drastically reduce the environmental impact, risks and costs in the manufacture and maintenance of DoD weapons systems. The objective of this project is to understand and evaluate the feasibility of using a one-step process at ambient conditions based on laser-interference structuring techniques to replace the chemical conversion coating steps prior to the application of coating systems or adhesive bonding for Al and Ti aircraft components. The presentation will first describe preliminary results for the surface preparation of Al2024-T3 for coating/adhesive bonding using laser-interference processing. The laser-interference power profile, which was used to structure the surfaces, was created by splitting the beam and guiding those beams to the sample surfaces. The results for the single-lap shear tests of an aluminum alloy and carbon fiber polymer composite specimens indicate an increased joint performance over baseline joints. Joints made with laser-structured surfaces were found to absorb approximately 150% more energy than the baseline joints.

Contact Information:

GLRPPR is a member of the Pollution Prevention Resource Exchange, a national network of regional information centers: NEWMOA (Northeast), WRRC (Southeast), GLRPPR (Great Lakes), ZeroWasteNet (Southwest), P2RIC (Plains), Peaks to Prairies (Mountain), WSPPN (Pacific Southwest), PPRC (Northwest).


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