Atmospheric corrosion is an important type of corrosion leading to failures in automotive service. Atmospheric corrosion can cause perforation failures, loss of structural strength and unsightly conditions on trim and painted surfaces. The environment in automotive service is substantially different from static exposures such as building components. The difference is caused by road splash and particulates that carry deicing salt and other ionic materials to the metal surface. Galvanic corrosion and occluded cell corrosion are significant mechanisms in causing localized corrosion failures in automotive service. Corrosion testing has been carried out with laboratory tests that attempt to simulate some aspects of automotive corrosion. Tests are also carried out with specimens mounted on vehicles either in test track runs or normal service. Static tests have also been used in which simulated deicing salt or road splash is applied to the specimens. Evaluation of test specimens varies depending on the type of problem expected.

Subject
Atmospheric corrosion, Zinc rich coatings, Water, Coatings, Materials, Salts, Corrosion rate, Acidity, Metals, Steel, Automotive, Nickel, Galvanic corrosion
Keywords:
atmospheric corrosion, deicing salts, pitting, galvanic corrosion, nickel chromium plating, anodized aluminum, saponification, poltice corrosion, salt spray test, atmospheric exposure tests
© 1991 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).
1991
Association for Materials Protection and Performance (AMPP)
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