Electrochemical corrosion electrochemical monitoring method is through the on-line monitoring system for the combination of linear polarization and weak polarization method to measure the corrosion current density, its technical characteristics are as follows:

The corrosion rate of a. directly measured medium, don't need the accumulation of corrosion;

B. Suitable for electrolyte corrosion system;

C. most of the application in the circulating water system or the rapid evaluation of corrosion inhibitors used in laboratory;

D. more interference factors. In water mixed with organic medium, the medium is not evenly distributed on the surface of the measuring element, cause the distortion measurement results;

E. general online electrochemical polarization resistance of instrument measurement range of 20 Ω ~ 500 k Ω, corrosion rate measurement range is 0.0004 mm/a ~ 10 mm/a.