Abstract
The formation of a passive ferrous sulfate film on mild steel in concentrated sulfur acid is well understood. The stability of this film dictates the corrosion rate anticipated and is examined with respect to dissolved iron in solution, acid motion, concentration and temperature. The formation of grooves on the interior walls of the acid tank cars is discussed in detail and is related to the deterioration of this film by hydrogen gas bubbles. A quick non-destructive technique used to monitor the extent of grooving is described and means to control the grooving corrosion suggested.
© 1987 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).
1987
Association for Materials Protection and Performance (AMPP)
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