This paper describes an experimental rig in which the erosion-corrosion behaviour of mild steel, 2.25Cr~1Mo steel and 310 stainless steel by silica particles at concentrations of 40 vol % and speeds of 0.5 to 10 m s−1 in air at temperatures to 600°C has been investigated. These conditions were achieved by rotating the alloy specimens through a fluidized bed of the erodant particles. The resulting damage to the specimen is dependent on velocity, particle size, temperature and alloy composition. A report is given of the effects of these parameters on the erosion-corrosion process and the mechanisms of damage are discussed in terms of the observed morphologies of the eroded surfaces. At 5 m s−1, the wear damage sustained by the specimens in a bed of coarse particles (700 to 900 μm diameter) increases with increasing temperature while, at 5 m s−1 for fine particles (100 to 150 μm diameter) and at 0.5 to 3 m s−1 for coarse particles, the damage decreases with increasing temperature. At the high speed and for coarse particles, the oxide scales are penetrated during erosion, giving oxidation-enhanced damage while, under the less severe conditions, the oxide scales can protect the surface from wear damage.

Subject
Wear, Materials, Fluidized beds, Oxide scales, Oxide surfaces, Weight loss, Erosion, Steel, Scale, Stainless steel, Erosion corrosion, Damage, Oxidation
© 1989 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).
1989
Association for Materials Protection and Performance (AMPP)
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