In the present paper the results obtained by the Argentinean research groups integrated in the MICAT (Iberoamerican Map of Atmospheric Corrosion) Proyect are informed. Outdoor exposure in 6 tests sasions of different environmental conditions were performed by quadruplicate, on plain carbon steel and pure zinc, copper and aluminium, during yearly periods from 1 to 4 years. Three samples were used for the weight loss determinations while the fourth one was used to characterize the corrosion products formed throught electrochemical d.c and a.c. techniques and SEM- EDAX surface analysis. Good correlations were observed among the corrosion rates, the environmental conditions, both electrochemical techniques and the morphology of the rusts in plant and in polished cross sections.

The techniqes applied allowed to evidence the different protectiveness of the rusts formed on the metals, according to the solubility, morphology, hygroscopic power and pollutants content of the corrosion products' components.

Subject
Time of wetness, Marine environments, Corrosion rate, Impedance, Corrosion products, Corrosion attacks, Pollutants, Film formation, Metals, Weight loss, Steel, Rust, Zinc
Keywords:
MICAT, Argentina, Atmospheric corrosiveness, Steel, Zn, Cu, Al
© 1995 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).
1995
Association for Materials Protection and Performance (AMPP)
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