Studies have shown that nitrogen fertilizer solutions are corrosive to carbon steel but in general do not attack aluminum and some stainless steels.1  However, aluminum is attacked if local acid conditions are allowed to develop.2  In an earlier paper,3  it was demonstrated that anodic protection was highly effective in controlling liquid phase corrosion of mild steel at 80 F in aqueous solutions containing: (1) ammonia, (2) ammonium nitrate, (3) mixtures of ammonia and ammonium nitrate and (4) mixtures of ammonia and ammonium nitrate with urea. An 11,000-gallon carbon steel vessel containing an ammonia-ammonium nitrate solution was then passivated using a field-type anodic protection system. No increase in solution iron content with time was observed in this initial field test.

Subject
Noble potential, Rail, Anodic protection, Corrosion rate, Steel coupons, Aqueous solutions, Ammonium, Vapors, Nitrogen, Corrosion inhibitors, Steel, Carbon steel, Corrosion potential
© 1968 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).
1968
Association for Materials Protection and Performance (AMPP)
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