Erosion-corrosion is an important aspect of durability for materials used in the oilsands industry. The combination of a corrosive fluid and high volume of sand means that erosion, corrosion and their synergistic interactions all act to accelerate material damage. Material degradation rates are typically controlled by use of surface engineering or by use of hard alloys such as those studied in this paper. The high chromium Cast White Irons (CWIs) are an important class of material for components used for slurry handing apparatus in the oilsands process. In this paper results from an evaluation of corrosion and combined erosion-corrosion are reported. Erosion processes accelerate corrosion and the extent of the acceleration is dependent on the alloying of the CWI. However, it is found that the ranking of the three CWIs tested was common when assessing corrosion and combined erosion-corrosion degradation. The degradation in erosion-corrosion is primarily by matrix extrusion from a mechanical point of view. Corrosion processes act to accentuate that mechanism of damage.

Subject
Water, Materials, Carbides, Slurry, Corrosion resistant alloys, Sand, Corrosion rate, Chromium, Iron, Free corrosion potential, Corrosion resistance, Erosion corrosion, Alloys
Keywords:
Erosion-corrosion, corrosion, white iron
© 2007 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).
2007
Association for Materials Protection and Performance (AMPP)
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