METHOD FOR DETERMINATION OF ANODE EARTHING REPAIR TIME Russian patent published in 2020 - IPC C23F13/02 

FIELD: electrochemical protection against corrosion.

SUBSTANCE: invention relates to the field of electrochemical corrosion protection of underground pipelines. At the initial moment of the cathode protection unit (CPU) input into operation, the resistance value of the current spreading from the anode grounding, which is part of the CPU of the pipeline section, and the output voltage of the converter of the CPU is measured, calculating current parameter of CPU, periodically correcting and measuring output voltage of converter of CPU, which is required to provide effective protection of pipeline section, based on the output voltage measurement data using the calculated current parameter determining the design value of current flow resistance from the anode grounding, plotting a curve of current flow resistance change from anode grounding in time, limiting resistance value of current spreading from anode grounding for given ground conditions, which is extrapolated by a linear function in time, and determining the time for achieving resistance to current spreading from the anode grounding of the critical value, which determines the length of anode grounding output for repair.

EFFECT: simplified implementation of the method without reducing efficiency of anticorrosive protection during its implementation.

4 cl, 1 tbl, 1 ex, 1 dwg