SYMPOSIA PAPER Published: 01 January 1995

Long-Term Atmospheric Corrosion in Spain: Results after 13–16 Years of Exposure and Comparison with Worldwide Data


Available information on atmospheric corrosion over long periods of time (10–20 years or longer) is unfortunately very scanty despite its great usefulness; in fact, only from such type of data can reliable long-term atmospheric corrosion predictions be made. This paper reports the results obtained after 13–16 years of field exposure tests at various Spanish test sites including several types of atmosphere: rural (El Escorial), urban (Madrid, Zaragoza), industrial (Bilbao), and marine (Barcelona, Cadiz, Cabo Negro, Alicante). Panels of low-carbon steel, zinc, copper, and aluminum were removed from open-air racks after 1–6, 8, 10, 13, and 16 years of exposure, and their weight losses used to determine the corrosion rate. Long-term corrosion data were found to conform to a general equation, C = Atn, where A and C are the corrosion losses after one and t years of exposure, respectively, and n is a constant. Only mild steel in scarcely aggressive atmospheres of central Spain was found to fit a more complex equation. The results are compared with those found throughout the world, which were compiled in a comprehensive literature survey. Finally, an attempt was made at correlating exponent n with the type of atmosphere for each metal studied.

Author Information

Morcillo, M
Centro Nacional de Investigaciones Metalurgicas, Madrid, Spain
Simancas, J
Centro Nacional de Investigaciones Metalurgicas, Madrid, Spain
Feliu, S
Centro Nacional de Investigaciones Metalurgicas, Madrid, Spain
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Developed by Committee: G01
Pages: 195–214
DOI: 10.1520/STP14920S
ISBN-EB: 978-0-8031-5302-8
ISBN-13: 978-0-8031-2015-0