This paper discusses automatic gas-metal-arc-welding (GMAW) overlay cladding for fireside corrosion and erosion/corrosion protection of the waterwall in coal-fired boilers equipped with a low NOx burner system. In addition, the use of overlay cladding for protection against steam soot blower erosion is discussed. Also discussed is the use of the cladding method for protection against damages from water lancing used to remove slag deposits from the waterwall. The overall success of this surface cladding technology for waterwall protection in coal-fired boilers is described.

Subject
Water, Oxide formation, Tubes, Welding, Grooving, Oxide scales, Waterwalls, Gas metal arc welding, Scale formation, Boilers, Corrosion protection, Steam, Alloys
Keywords:
fireside corrosion, erosion, corrosion, corrosion-fatigue, waterwall, coal-fired boilers, low NOx burner, weld overlay, overlay cladding, soot blower, water lance
© 2004 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).
2004
Association for Materials Protection and Performance (AMPP)
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