Abstract
The atmospheric corrosion rates of steel were measured in an industrial district (Kôtô-ku) of Tokyo, Japan.
Analyzing correlations between the corrosion rates and meteorological factors and/or atmospheric pollution substance factors by means of statistical analysis method, a corrosion regression was obtained to describe the influence of these two mutual interacting factors on corrosion of steel.
The result may be expressed as:
y=-136.91+0.05x1+2.56x2+0.12x3+3.60x4+(-24.63)x5+2.0x6+(-14.37)x7+13.43x8+3.65x9+(-1351.99)x10
where,
y: corrosion rate (mdd), x1: temperature (°C),
x2: humidity (RH%), x3: precipitation (mm),
x4: sulfur dioxide (mg/day·100cm2),
x5: sea-salt particles (chlorides) (mg/100cm2),
x6: wind velocity (m/sec), x7: soluble substances (g),
x8: insoluble substances (g), x9: sulfates (g),
x10: tar substances (g).
