Coating formulators, end users, and independent testing laboratories have been evaluating the performance of protective coatings for over 50 years. Initial testing protocol was limited to "test fences" or "test racks" located near the seacoast or on industrial sites. While such testing provided meaningful results of relative performance, exposure times were prolonged where there was little or no acceleration of severity of exposure.

Extensive efforts have been expended in all aspects of the coating industry in the ensuing years in attempts to obtain meaningful results of relative coating performance in reduced elapsed time periods through various means of accelerating testing by increasing and varying the severity of exposure. The validity of the data subsequently obtained, in regards to the level of correlation to the real world, has always been questioned.

Subject
Test methods, Coating performance, Zinc rich coatings, Protective coatings, Coatings, Substrates, Impedance, Internal stress, Stress, Salt spray corrosion testing, Immersion, Barrier coatings, Drying
Keywords:
Protective coatings, accelerated testing, cyclic testing, intermittent exposure, salt fog
© 1991 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).
1991
Association for Materials Protection and Performance (AMPP)
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