The properties of 6Mo super austenitic stainless steels are discussed with special attention for structure stability, mechanical properties and weldability. These grades have a PREN value (Cr + 3.3Mo + 16N) higher than 42 and contain more than 20Cr% and 0.2 to 0.4N%. Then, the results of corrosion tests performed in chloride containing acidic media and including electrochemical data are presented and discussed. According to their excellent corrosion resistance 6Mo grades are one of the best solutions for severe conditions encountered in chemical industry, flue gas desulfurisation (FGD) process and hydrometallurgy.

Subject
Materials, Molybdenum, Sulfuric acid, Superaustenitic stainless steel, Niobium, Free corrosion potential, Acidity, Base metals, Pitting, Corrosion resistance, Stainless steel, Chlorides, Weld metal
Keywords:
6Mo stainless steels, super austenitic, welding, chloride containing sulfuric acid, electrochemical study, potential - pH diagram
© 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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