This paper discussed the possibility of obtaining electrochemical impedance spec-troscopy (EIS) responses of zinc rich paints (ZRP) using serial double-cell (SDC). The influence of counter electrode was outlined. An equivalent circuit (EC) for the double-cell was then discussed. The relationship between EC, the time constant, the parameters in EC of SDC and those of two single cells was also discussed. The results gained by serial double cell test are consistent with those of single cell test. It can be concluded that double cell test method can be used to study ZRP completely.
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