Atmospheric corrosivity in São Paulo: Twelve years

Abstract

Results of twelve years of atmospheric corrosion tests of eleven different metallic materials in industrial and urban areas in the Metropolitan São Paulo area and rural area, 200 km from this city are presented.
Considerable differences where observed between samples tested in the rural area compared to those tested in the industrial area mainly with carbon and galvanized steel and zinc. Weathering steels had a same good performance at industrial region but almost the same at rural areas in comparison to carbon steel. Ferrous metals and aluminum had their corrosion rate diminished the time. On contrary, zinc and aluminum corrosion rates are approximately linear with time. Austenitic stainless steel is almost immune to the atmospheric corrosion.

Reference
GIORGI, F.; ALMEIDA, L. A. B.; FARIA, E. A. Corrosão atmosférica em São Paulo: doze anos. In: CONGRESSO BRASILEIRO DE CORROSÃO, 17., 1993, Rio de Janeiro. Anais… Rio de Janeiro: ABRACO, 1993. v.1, p.318-326.

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