In this paper an anomalous form of long term corrosion behaviour observed in mild steel exposed to some atmospheres in Spain is described. In such atmospheres corrosion kinetics of the steel wasfound to deviate from the behaviour predicted by the well known bilogarithmic law. The authors speculate on the plausible causes of this abnormal behaviour and suggest that low atmospheric corrosiveness in combination with short wetting and drying periods of the metal surfaces eventually result in theformation of protective rust layers.
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