Method and apparatus for analyzing the state of protection against corrosion of a structure in the cathodic protection.

摘要

The invention relates to the study of the evolution in time of the voltage between an electrode (9) and a metal structure (1) buried in the ground (3) and intended to be protected against corrosion by an electric current. & br / for this study, provision is made to discontinue the flow of current, to raise the voltage between the structure (1) and the electrode (9), the passage of these readings in an analog filter (11), of smooth these signals are filtered in the substituent of the values corresponding to a function g that is continuous and uniform, and then, the said filtering operation which will be distorted said signals, to reconstitute mathematically the evolution of the signals of the voltage between the structure and the electrode, such that it would be without the analog filter. & br / the invention applies to the study of the cathodic protection of the gas pipes.