Many failures in high density polyethylene external pipeline coating have occurred in the Lake of Maracaibo environment due to the presence of microorganisms. Analysis of the commercial coating after the failure shows drastic changes through the years. It has been suggested that incorporation of a cupric compound in the polyethylene formulation can control the attack of microorganisms.

A detailed analysis of this product after being extruded has shown that the cupric compound does not affect the initial properties of the coating. Laboratory and field results will be presented in this paper.

Subject
Outdoor weathering, Water depth, Additives, Pipelines, Chemical attack, Mechanical properties, Polymers, Weathering, High density polyethylene, Coating formulation, Coating defects, Polyethylene, Microorganisms
Keywords:
coating, corrosion, protection, polyethylene, failure, pipeline, cupric compound, microorganism
© 1994 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).
1994
Association for Materials Protection and Performance (AMPP)
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