Methods for measuring bounding corrosion rates using coupled multielectrode sensors and eliminating the effects of bad electrodes

摘要

The bounding corrosion rate is measured with a coupled multielectrode array sensor by decoupling a select number of anodic electrodes on the sensor from the coupling joint. In doing so, all or most of the electrons produced on the anodic electrode that remains connected to the coupling joint are forced to flow to the coupling joint and are thus measured. Because of the large number of electrodes on a multielectrode array sensor, one of them may become contaminated by foreign materials during the measurements or polishing process. The effect of such an electrode on the performance of the sensor can be eliminated by automatically disconnecting it from the coupling joint.