In a case that coating like heat shrinkable sheet (HSS) or cold tape is detached from buried pipeline surface, cathodic protection current can’t penetrate into the pipeline surface enough to polarize cathodically due to the impervious characteristic of outer backing layer. Microbiologically induced corrosion can develop seriously at the pipeline inside the failed coating under the favorable environment for sulfate reducing bacteria (SRB) proliferation.

A series of works have been performed in order to develop the antibacterial coating against SRB. Minimum inhibitory concentration (MIC) and thermal treatment effect on the antibacterial activity simulating the temperature of production and application were evaluated for the optimal biocide selection. Coating properties as well as antibacterial efficacy of HSS adhesives incorporated with reagent graded agents and industrial biocides were tested. Prototypes of antibacterial HSS system fabricated at factory have shown that the antibacterial coating could be developed to the level of commercial product.

Subject
Water, Coatings, Adhesives, Coating properties, Pipelines, Solubility, Cathodic disbondment, Efficacy, Shear, Reagents, Biocides, Peeling, Microbiologically influenced corrosion
Keywords:
microbiologically induced corrosion, sulfate reducing bacteria, antibacterial coating, heat shrinkable sheet, cathodic shielding, biocide, minimum inhibitory concentration
© 2011 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).
2011
Association for Materials Protection and Performance (AMPP)
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