This paper discusses novel applications of anodic protection, weld overlay, and thermal spray coating for corrosion protection of carbon steel batch and continuous digesters. Anodic protection now offers the possibility of protecting behind screens and blank plates. Stainless steel weld overlay can be applied behind headers for protection against erosion-corrosion. Thermal spray coatings can be applied over circumferential weld seams for protection against stress corrosion cracking. Also discussed are the advantages and disadvantages of each protection mode as well as their compatibility with each other.

Subject
Acids, Digesters, Anodic protection, Walls, Construction, Carbon steel, Corrosion protection, Stainless steel, Erosion corrosion, Corrosion potential, Stress corrosion cracking, Thermal spray coatings, Cleaning
Keywords:
acid cleaning, anodic protection, clad plate, digesters, duplex stainless steel, erosion-corrosion, intergranular attack, pitting, pulp and paper, stress corrosion cracking
© 2001 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).
2001
Association for Materials Protection and Performance (AMPP)
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