To protect against corrosion, exterior Department of Defense (DoD) Aboveground Storage Tank (AST) surfaces initially receive a three-coat coating system consisting of epoxy primer (MIL-DTL-24441, Formula 159, Type III), epoxy intermediate (MIL-DTL-24441, Formula 152, Type IV), and polyurethane topcoat (MIL-PRF-85285D, Type II). Exterior AST maintenance painting is generally required at less than eight years service. The initial three-coat system is not appropriate for use over aged and weathered coatings and contains more than 304 g/l (2.5 lbs/gal) of Volatile Organic Compounds (VOC) per coat. Work associated with field demonstrating a novel “Two-Coat Low VOC Maintenance System” applied to the exterior coating systems of two ASTs is presented. The two-coat system employed the Small Business Innovative Research (SBIR) developed Low VOC Barrier Coating (LVBC), for use as the direct-to-weathered paint barrier coat, followed by the Environmental Security Technology Certification Program (ESTCP) validated Zero-VOC Topcoat (ZVT).

Subject
Field performance, Volatile organic compounds, Test methods, Coating application, Top coats, Solids, Coating adhesion, Aboveground storage tanks, Maintenance, Blistering, Barrier coatings, Peeling, Coating systems
© 2005 Association for Materials Protection and Performance (AMPP). All rights reserved. This work is protected by both domestic and international copyright laws. 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).
2005
Association for Materials Protection and Performance (AMPP)
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