Corrosion measurements in a laboratory setting for evaluating corrosion under extreme conditions, and performance characteristics of corrosion inhibiting products is an essential prerequisite for the ultimate application of technology in the field. Typically these measurements are carried out by weight loss method and visual inspection of panels exposed in humidity or salt spray chambers. Corrosion rates determined by these nonelectrochemical methods do not reveal any details about the mechanism of corrosion or corrosion inhibition and performance characteristics of a product. The use of electrochemical methods offer a great deal more with regard to the mechanistic details in corrosion and product performance. Examples of the use of polarization resistance (PR) electrochemical method for evaluating mechanistic aspects in cooling water corrosion, atmospheric corrosion, and phosphatizers will be presented.

Subject
Acids, Water, Performance characteristics, Corrosion rate, Corrosion products, Film formation, Weight loss, Corrosion inhibitors, Immersion, Corrosion protection, Cooling water, Chemical conversion coatings, Electrodes
Keywords:
Corrosion, Electrochemical Measurements, Oxygen Corrosion, Aqueous Corrosion, Atmospheric Corrosion, Phosphatizers, Conversion Coatings, Corrosion Inhibitors, Rust Proofers
© 1994 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).
1994
Association for Materials Protection and Performance (AMPP)
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