Zinc Rich Coatings are used for the primary purpose of protecting steel from corrosion, and the properties and mechanisms of protection afforded are well recognized in industry today. Zinc rich primers come closest to meeting the requirements of an ideal rust inhibitor. Properly formulated, a zinc rich primer performs two functions; initially, it is electrically conductive, protecting cathodically. Then the exposed surface of zinc reacts with water, oxygen and carbon dioxide in the air to form insoluble zinc corrosion products, which fill the pores of the film. The resulting coating then acts as a barrier coating which in turn protects the underlying free zinc in the film, allowing it to remain dormant until the film is damaged. When damaged, the cycle is repeated.

Subject
Primers, Zinc rich coatings, Vinyls, Top coats, Cathodic protection, Zinc-rich primers, Silicates, Organic zinc, Rubber, Zinc, Epoxies, Inorganic zinc rich coatings, Abrasion resistance
© 1975 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).
1975
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.