Long-term atmospheric corrosion monitoring

The paper presents the analysis of corrosion rates of carbon steel, zinc, a luminium and copper after long-term exposition as a function of time and en vironmental parameters. All experimental methodologies on the test sites we re carried out according to ISO standards. The analysis of trends of enviro nmental pollution and corrosion rates was performed for one year exposition of metals on three sites (urban/industrial, urban and rural atmosphere) in Poland. The corrosivity changes as a result of a reduction of corrosion ra tes of metals used are relatively smaller then the reduction of pollution. By using the equation C = At-n, where C - corrosion rate after t years, A - corrosion rate after the first year of exposition, and results of long-ter m corrosion rates, exponent n was determined for the different metals and s ites from log-log plots.