A new slurry wear test developed by the Bureau of Mines allows for the simultaneous measurement of both volume loss and corrosion rates during the wear process. Slurries of silica sand and aqueous solutions are continuously fed into the test chamber, where they abrade and corrode the test specimens. Sixteen specimens form the wall of the chamber in which the slurry is circulated by an impeller at 15.6 m/s. A specimen can serve as a working electrode, while two or three other specimens can be used as counter electrodes in an electrochemical cell. A reference electrode Luggin probe is placed adjacent to the working electrode specimen. Using electrochemical techniques, corrosion rates of metallic specimens were determined during slurry wear tests. Weight loss and density measurements were used to calculate wear rates in terms of volume loss per unit time as a function of pH, temperature, and solids concentration. The test results showed that the combined effects of abrasion and corrosion resulted in a total wear loss different from the additive effects of each process taken alone.

Subject
Wear, Materials, Slurry, Corrosion currents, Corrosion rate, Abrasives, Solids, Acidity, Plastics, Erosion, Steel, Stainless steel, White cast iron
© 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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