Not only the coating material corrosion resistance, but also the coating-substrate interface crack resistance and coating permeation to liquor and its vapor are found to be critical factors affecting the coating performance in Kraft pulping digesters. The behavior of electric-arc and HVOF sprayed coatings is discussed.

Subject
Digesters, Coating performance, Coatings, Materials, Liquor, Permeability, Spray coating, High velocity oxy fuel spraying, Gas pressure, Cracking resistance, Interfaces, Blistering, Thermal spray coatings
Keywords:
Kraft pulping, continuous and batch digester, coating, alloy 625, gas permeability, sulfidation, crack resistance, electric arc spraying, high-velocity oxygen-fuel spraying
© 1999 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).
1999
Association for Materials Protection and Performance (AMPP)
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