The galvanic current of stainless steel/silver atmospheric corrosion monitors exposed to the atmosphere for 4 months are analyzed to investigate the scaling behavior of corrosion. The time series of the galvanic current indicate that the galvanic current has a scaling property; a scaling relation predicted by the scaling theory is consistent with the experimental results of the stainless steel/silver atmospheric corrosion monitor and the Hurst coefficient representing the effect of long memory is related to the type of corrosion.