Solid particle erosion damage of utility turbine and nozzle components is associated with exfoliation of oxides from the internal surfaces of superheaters, reheaters, and steam piping. Hence, extensive work was performed by Babcock & Wilcox in the 1950's and 1960's to study oxide formation and exfoliation in superheater tubing. The test program indicated that steam-side scale exfoliation occurs on all low alloy steels and is due to the difference in thermal expansion coefficients for the oxide scales and the underlying steels.(1) Application of protective coatings was perceived as an attractive means for relieving the exfoliation problem. Efforts were concentrated on developing a diffusion coating process, chromizing, in which chromium is alloyed to the surface of the base metal.

Subject
Coatings, Carbides, Metal surfaces, Tubes, Oxide layers, Exfoliation, Oxide scales, Tubing, Oxide surfaces, Penetration, Stainless steel, Steam, Oxidation
© 1980 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).
1980
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.