This paper relates to a multi-faceted evaluation of protective systems for three cast aluminum alloys; namely, AZ91-T6, EZ33-T5, ZE41-T5. This includes determining for the cast alloys: 1) the inherent corrosion and fatigue characteristics, 2) the effects on corrosion resistance and fatigue endurance of machining, peening, impregnating, pickling, chromating, anodizing, and organic finishing, 3) the effectiveness of protective systems in reducing pitting and galvanic corrosion, and 4) the degree of protection which can be afforded by corrosion inhibitors incorporated in mineral oil or synthetic fluid lubricants.

Primarily, it is the intent of this presentation to describe the surface processing and finishing systems being evaluated on the cast magnesium alloys because of the importance and use of the alloys for transmission gear housings in Army helicopters. This will serve to inform persons affiliated with military services and appropriate contractor personnel of the objectives and the direction of this effort. Comments concerning early results from some phases of the investigation are offered. The investigation is continuing.

Subject
Surface finishing, Water, Materials, Corrosion rate, Metal surfaces, Magnesium alloys, Surface treatments, Fog, Specimen preparation, Housing, Salt spray corrosion testing, Corrosion protection, Alloys
© 1976 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).
1976
Association for Materials Protection and Performance (AMPP)
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