Zero-resistance ammeter measurements and a 23 full factorial statistical experimental design were used to determine the effects of pH, oxygen, and red rust on the cathodic half cell reaction on corroding electrogalvanized steel. Analysis of variance indicated that the red rust reduction reaction was dominant. The recently developed galvanic corrosion/mechanical wedging model for underfilm corrosion of painted galvanized steel is thus supported.

Subject
Cathodes, X-ray diffraction, Electrochemical reactions, Acidity, Steel, Rust, Oxygen, Coating defects, Zinc, Risk reduction, Galvanic corrosion, Paints, Electrolytes
Keywords:
anodic dissolution, electrogalvanized steel, underfilm corrosion, cosmetic corrosion, oxygen reduction, Evans Reaction, galvanic corrosion, zero-resistance ammeter
© 1995 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).
1995
Association for Materials Protection and Performance (AMPP)
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