Electrochemical interactions between abrasive slurries and metal alloys were studied by the Bureau of Mines, U.S. Department of the Interior, to determine whether wear encountered in slurry transportation could be reduced. Relationships between erosion and corrosion were determined by conducting wear tests under conditions of cathodic protection and by obtaining polarization scans during slurry abrasive wear. These studies were conducted using silica sand and ores from copper and silver mines.

Three types of laboratory tests were conducted to determine 1) the total erosive-corrosive wear rate, 2) the loss caused by erosion only, and 3) the electrochemical corrosion rate. The total wear rate was determined from the weight loss and density measurements reported in units of volume loss per unit time. The loss caused by erosion only was determined by cathodically protecting the specimens. The corrosion rate was determined by using polarization scans with the test specimen as the working electrode. The test results showed that the combined effects of erosion and corrosion resulted in total wear rates that were much greater than the additive effects of each process taken alone. This result proved that a strong synergism exists between erosion and corrosion.

Subject
Wear, Materials, Slurry, Sand, Corrosion rate, Synergistic effect, Abrasives, Solids, Erosion, Steel, Polarization, Alloys, Corrosion potential
© 1988 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).
1988
Association for Materials Protection and Performance (AMPP)
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