Relationship Between Wetting Amount and Atmospheric Corrosion Rate of Zn in Initial Stage Under Dropwise Wetting Condition.

Abstract

The relationship between wetting amount and corrosion rate in initial stage of atmospheric corrosion was investigated to determine whether the peak corrosion rate observed under solution film also occurs under dropwise wetting. Zinc ER sensors were deposited with NaCl and tested for 360 hours at constant temperature and humidity. The corrosion rate was compared with wetting amount, which could be calculated from the amount of deposited salt and the relative humidity. Peak corrosion rates did not occur in this experiment, and corrosion rates increased with increasing wetting amount.