Corrosion rate meter

Abstract

Abstract A corrosion rate meter with metallic electrodes contactable by a corrodent, including a test specimen electrode, a reference electrode, and a third or auxiliary electrode. A source of direct current passes between the test and third electrodes, at selected intervals, a predetermined. relatively constant current whereby a polarization potential is created between the test and reference electrodes. An isolation amplifier; with an input circuit between the test and reference electrodes, provides in its output circuit an output signal representative of the potential difference between these electrodes. A signal correction means applies a corrective signal to the input circuit of the isolation amplifier. The corrective signal removes from the output signal of the isolation amplifier any components representing the potential difference present between the test and reference electrodes intermediate the intervals of current flow creating the polarization potential. A readout means connected to the output circuit of the isolation amplifier to measure the output signal representative of the polarization potential (and corrosion rate) created between the test specimen and reference electrodes.

Inventors

• 👤 Homer M Wilson

Bibliographic Details