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Corrosion caused by the atmosphere on 1050 aluminum in the Basque country
Author(s) -
Elola A. S.,
Otero T. F.,
Porro A.
Publication year - 1993
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.19930440104
Subject(s) - aluminium , chloride , relative humidity , atmosphere (unit) , corrosion , metallurgy , humidity , environmental chemistry , environmental science , materials science , chemistry , meteorology , geography
After exposing aluminium samples to five atmospheres (rural. industrial and marine‐industrial) in the Basque Country, the number and depth of the pits formed for different exposure times were measured. During the four years of exposure, sulphur dioxide and chloride ion levels, together with relative humidity and temperature, were determined. From these results, a linear increase of the pit density with time and a bilogarithmic one of the pit depth with time, were determined. An important effect of the synergistic action of SO 2 and chloride in the formation and growth of pits was found. A statistical treatment is proposed to predict the pit density to be formed when the 1050 aluminum is exposed to the atmosphere.