The "C" family of Ni-Cr-Mo alloys over the last 60 years has had many variations starting with Alloy C, Alloy C-276, Alloy C-4, and Alloy 22. Alloy 59, the most recent advancement, is a tungsten-free low iron 59Ni-23Cr-16Mo alloy. This advanced Ni-Cr-Mo alloy has been designed to withstand the most severe corrosive conditions of the modern chemical process industry and today's environmental pollution control systems, where other alloys are at the end of their usefulness limits. Alloy 59 is intended for applications dealing with chloride containing sulfuric acid, FGD media at pH below 1 and temperatures greater than 100°C, environmental control technologies of halogenated waste incineration systems, hot dilute hydrochloric acid, hot strongly oxidizing contaminated sulfuric and phosphoric acids, and other mixed/complex acid mixtures. After a brief insight into the historical development of the "C" family of alloys, the various aspects of Alloy 59, and results of laboratory and field tests are presented.

Subject
Acids, New alloys, Precipitation (solids), Corrosion resistant alloys, Corrosion rate, Sulfuric acid, Molybdenum alloys, Nickel chromium molybdenum alloys, Welding, Commercial alloys, Corrosion resistance, Alloys, Chlorides
Keywords:
Nickel Base Alloy, Alloy Development, Ni-Cr-Mo Alloy Chemical Process Industry (CPI), Mineral Acids/Acid Mixtures, Chlorides, Pollution Control, Thermal Stability
© 1991 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).
1991
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.