With a view to an improvement of perforation corrosion resistance of automotive underbody parts, a basic study was carried out on the corrosion properties of steel, and from this study a hot-rolled steel with good corrosion resistance was newly developed. The perforation life time of this TS 45kgf/mm2steel with good workability and paintability proved to be about twice that of conventional low C mild steel, based on a cyclic corrosion test conducted on underbody parts. Its high resistance to perforation corrosion was thought to be attributable to the formation of a protective rust layer of an amorphous species during the corrosion test.

Subject
Materials, Perforation, Tape, Corrosion testing, Alloying elements, Interfaces, Steel, Rust, Automotive, Corrosion protection, Corrosion resistance, Blistering, Peeling
Keywords:
perforation corrosion resistance, automotive underbody parts, hot-rolled steel, cyclic corrosion test, protective rust layer
© 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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