Aluminum swimming pools have been built for over two decades. Usually, pool tanks are fabricated from a welded 5000 series aluminum and piping components from a 6000 series. A large modern Aquatics complex in Southern California features a 50 meter competition pool, a 33-1/3 meter diving pool and a 25 yard recreation pool. The interiors of the pools were coated with a chlorinated rubber system. No other corrosion control was provided initially. The three pools have suffered pitting corrosion along welds, around lights and grills, in drains, in distribution piping, in gutters and return water plenums. The pools have corroded on the outside from exposure to ground water and soil. After 5 years, leaks have occurred in distribution piping, under the diving and recreation pools from soil side attack. Cathodic protection systems have been designed and installed. Impressed current is used on the outside and zinc anodes on the inside chambers. A new high build vinyl coating system will be applied after sandblasting when all the aluminum rework has been completed.

Subject
Water, Piping, Cathodic protection, Aluminum, Zinc anodes, Reference electrodes, Soil resistivity, Pitting, Corrosion protection, Copper, Zinc, Soil, Electrode potential
© 1985 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).
1985
Association for Materials Protection and Performance (AMPP)
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