Application of Operational Amplifier in Corrosion Study

(Part II) Trial Construction of a Potentiostat Using an OP Amplifier

Abstract

A trial construction of battery operated mini potentiostat for potentiostatic test in field was performed by using an OP amplifier. A circuit diagram was presented and the detail of construction was described. Potentiostatic behaviors of mild steel were examined in fresh and polluted sea water, and it was certified that this potentiostat operated satisfactorily in both laboratory and field test. A modification for raising the input impedance of the instrument was briefly described.