The effects of air in combination with up to 40% H2O and temperatures up to 1000 °C on S35315 are reported. The exposure time varied from 20 h to 1000 h in a tube furnace, and up to 200 h in a thermobalance, under cyclic and isothermal conditions. The results show that the oxidation behavior of S35315 in water vapor is characterized by a protective chromium rich oxide scale and no breakaway oxidation was observed for this steel. The mechanism of oxidation in an atmosphere containing water vapor is discussed, linked to the ability for chromium to diffuse to the surface and some assumptions are proposed regarding the effects of different alloying elements such as Ce, Si, Ni and Cr.

Subject
Test methods, Water, Evaporation, Chromia, Tubes, Chromium, Atmosphere, Vapors, Mass gain, Furnaces, Oxide scales, Steel, Oxidation
Keywords:
austenitic stainless steels, high temperature corrosion, evaporation, breakaway oxidation, oxidation, water vapor, isothermal oxidation, cyclic oxidation
© 2006 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).
2006
Association for Materials Protection and Performance (AMPP)
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