Pitting corrosion is the main type of corrosion that is commonly found in aluminium. Its occurrence can be minimized in a number of ways. Under some circumstances improved design of components may be possible. Increasing the purity of the metal is also known1  to lower the incidence of pitting corrosion. Both of these methods are clearly limited in scope. A third possible method is to alter the solution. If the solution that is causing pitting cannot be altered with respect to the specific species that is responsible for pitting then the solution must be modified by the use of inhibitors. The work reported below arose from a problem concerned with the corrosion of toothpaste tubes whose design and composition were not realistically changeable. A number of pitting corrosion inhibitors were investigated over a narrow range of concentration and for one specific chloride concentration, these figures being dictated by the nature of the problem.

Subject
Pits, Electric current, Ions, Aluminum, Repassivation, Repassivation potentials, Chloride solutions, Acetates, Phosphates, Corrosion inhibitors, Pitting, Protection potential, Electrode potential
© 1979 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).
1979
Association for Materials Protection and Performance (AMPP)
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