SBIR 95-1 SOLICITATION

PROJECT SUMMARY

Proposal Number:

13.04-0017B

Project Title:

ADVANCED MOLYBDATE CONVERSION COATINGS FOR ALUMINUM AND ITS ALLOYS

Technical Abstract:

This SBIR Phase I project is to demonstrate the feasibility of using a new approach to apply molybdate (hexavalent molybdenum) conversion coatings to aluminum and its alloys. Chemical conversion coatings, particularly chromate conversion coatings, have found widespread military and commercial applications. Of particular interest to NASA would be the use of chemical conversion coatings on aircraft aluminum alloys and aluminum access structure and ground support equipment, because of their excellent corrosion resistance and their ability to serve as an effective base for paint. Conventional baths used to develop this coating contain chromates (hexavalent chromium), and it is the residual chromates in the coating that are largely responsible for the high degree of corrosion inhibition observed. However, chromates are highly toxic and their presence in wastewater effluents is severely restricted. Thus, it is highly desirable to develop an alternative coating process for aluminum and its alloys utilizing non-toxic chemicals. The key to the proposed project is the use of Advanced Oxidation Processes (AOPs) to promote the oxidation of low valence molybdenum to hexavalent molybdenum in a post-treatment stage and, hence, enhance the formation of protective oxide films on aluminum or aluminum alloys. The proposed procedure is simple and environmentally benign.

Potential Commercial Applications:

The anticipated benefit of this project is a viable alternative to the polluting conventional chromate conversion process used for a multitude of military and commercial end items. The molybdate (hexavalent molybdenum) process could eventually replace conventional chromate conversion coatings for commercial applications which is a multi-million dollar business. Developed technology will also be beneficial with respect to the environment and human health.

Name and Address of Offeror:

Lynntech, Inc.
7610 Eastmark Drive, Suite 105
College Station, Texas 77840