The designer of industrial equipment and piping has three weapons in the fight against corrosion under insulation (CUI). The first and primary defense against CUI is a high quality, immersion grade coating. The second is a properly designed and installed weather barrier jacketing. The third and, arguably, least understood element is the choice of insulation material. This paper will explore the ways in which insulation materials influence CUI behavior, presenting results from both laboratory and field-testing on seven industrial insulation materials and one composite system. The materials tested were calcium silicate, expanded perlite, cellular glass, mineral wool (both regular and water-repellent grade), and two types of flexible aerogel blanket material -Pyrogel XT and Cryogel Z.

Subject
Water uptake, Insulation materials, Water, Materials, Piping, Insulation, Glass, Calcium silicate, Minerals, Wool, Corrosion inhibitors, Corrosion under insulation, Drying
Keywords:
Insulation, corrosion, CUI, aerogel, mineral wool, calcium silicate, expanded perlite, cellular glass, wetting
© 2019 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).
2019
Association for Materials Protection and Performance (AMPP)
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