Thin Film Corrosion-Indicating Bridge
Original Publication Date: 1989-Apr-01
Included in the Prior Art Database: 2005-Jan-27
A thin film corrosion monitor is disclosed which operates on the Wheatstone bridge principle. By fabricating the resistive elements from an evaporated thin film, the performance of this device approaches that of an ideal Wheatstone bridge. The principal benefits of the thin film approach are: versatility (any metal or alloy which can be evaporated can be used as the corrosion sensor); a high degree of reproducibility (due to the use of a precision mask); sensitivity (due (Image Omitted) to the high line resistances attainable with thin films); and the minimization of undesirable thermal effects (no internal thermally induced EMFs).