Aluminum is used in a wide variety of telephone cable sheath constructions. In some cases aluminum is the only metallic shield element in a composite cable sheath and in other cases it is used together with steel. In both cases the metal components are protected against corrosion by a flooding compound and a polyethylene outer jacket. Since most of the new telephone cables are either buried directly in the soil or pulled into nonmetallic underground ducts, the corrosion protective components are subject to mechanical, electrical and biological damage, therefore the underlying metallic components are subject to corrosion by soil water. General corrosion, concentrated in small areas, causing discontinuity in the aluminum shield, is the worst type for telephone cables. Pitting corrosion, although representing some impairment of the shield, is not critical.

Subject
Acids, Pits, Coatings, Aluminum, Alkaline solutions, Anode surfaces, Acidity, Sodium chloride solution, Corrosion inhibitors, Steel, Pitting, Corrosion protection, Electrodes
© 1974 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).
1974
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.