Different stainless steels such as 254 SMO, Sanicro 28 and SAF 2205 have been exposed to natural sea water. During the exposure the potential on freely exposed specimens and current density on cathodic polarized specimens were measured. Due to the formation of a microbiological slime on the surfaces, the potential rose to values more positive than +300 mV SCE, while the current density increased during the first weeks of exposure for specimens polarized to potentials more positive than -500 mV SCE.

The effect of increased velocity was examined. In addition, parallel experiments were done with artificai sea water and 3% NaCl. These results compared with the results from natural sea water, indicate that artificai sea water/3% NaCl can not replace sea water in laboratory experiments.

Subject
Water, Stainless alloys, Slime, Diffusion, Current densities, Cathodic current density, Surface layers, Electric potential, Oxygen, Stainless steel, Risk reduction, Polarized potential, Electrochemical potential
© 1986 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).
1986
Association for Materials Protection and Performance (AMPP)
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