Sealing solutions, primers and sealants containing Cr(VI) have been in use in DoD (Department of Defense) for the past several decades. Though Cr(VI) has excellent corrosion inhibitive characteristics, it is a known carcinogen1. The EPA(Environmental Protection Agency) and OSHA(Occupational Safety and Health Administration) regulations require that the DoD, DoE(Department of Energy) and industries eliminate the use of toxic substances such as those containing Cr(VI). For the past several years, many researchers have been working to find a suitable substitute for Cr(VI). However, in the opinion of the authors, the research findings reported thus far have not yet found a viable substitute for Cr(VI). The present research addresses this issue in two phases : a) by drastically reducing Cr(VI) content to at or below the EPA safety level for Cr in drinking water(100 μg/L)2 and b) by eliminating Cr(VI) altogether. The preliminary results are presented in this paper.

Subject
Chemical compounds, Costs, Wash solutions, Alkaline solutions, Salt solutions, Acidity, Sodium chloride solution, Chemical inhibition, Corrosion inhibitors, Health, safety, and environment, Corrosion protection, Aluminum alloys, Alloys
Keywords:
Aluminum, anodizing, corrosion, inhibitor, sealing
© 1998 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
1998
Association for Materials Protection and Performance (AMPP)
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