The Admiral is moored in the Mississippi River at the St. Louis Arch. The river has logs, branches and other debris which travel downstream at about 12 mph (19 kph). An anode system had to be designed to withstand the impact of this debris. A series of high silicon iron button anodes was designed, with the anodes being fastened with through-hull fittings. This required a water tight stuffing, box arrangement within the hull for each anode since the work had to be done while the ship was in the water. Special attention was also paid to electronic interference with the sophisticated computer equipment on board; this included precautions in the rectifier circuitry and the use of automatic potential control to keep the hull at a constant potential.

Subject
Water, Cathodic protection, Rivers, Renovation, Reference electrodes, Installation, Cables, Hull, Rectifiers, Equipment, Marine vessels, Electrode potential, Anodes
Keywords:
cathodic protection, ship hull cathodic protection, cathodic protection in fresh water, automatic potential control, cathodic protection in rapidly flowing water
© 1995 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).
1995
Association for Materials Protection and Performance (AMPP)
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