Coupled multielectrode array sensor (CMAS) is an effective tool for monitoringlocalized corrosion.It has been demonstrated that the CMAS is also effective in monitoring non-uniform general corrosion. When used for monitoring uniform gneral corrosion however the CMAS method is affected by the internal current.This paper reports the experimental evaluation for the effect of the internal current on the CMAS probe when the corrosion is domminated by uniform corrosion.