LONG-TERM REFERENCE ELECTRODE Russian patent published in 2024 - IPC C23F13/00 

FIELD: measuring equipment.

SUBSTANCE: invention relates to control (monitoring) of electrochemical (cathodic) protection of underground steel structures, including pipelines from corrosion. A long-term reference electrode (LTRE) comprises a dielectric housing, an electrode and a measuring wire with contacts. All contacts and wires are sealed. Electrode comprises a voltage source made in the form of an electronic or electrochemical device with galvanic cells Zn/NaCl/AgCl/Ag, or Pb/PbSO₄/SO₄²⁻/Ag₂SO₄/Ag, or Pb/PbSO₄/K₂SO₄, KCl/AgCl/Ag, output contacts of which are connected to electric contacts of electrode and its measuring wire. Electrode type is selected based on the condition E_ze = E_se + E_mouth, where E_ze is the potential of the long-term reference electrode, equal to +100 mV, E_se is the potential of the immediate-sulphate electrode in mV, E_mouth is the voltage at the contacts "+" and "−" of the device in mV.

EFFECT: creation of a long-term comparison electrode with a common in ECP potential of +100 mV relative to a reference silver chloride electrode (SCE) of comparison, excluding copper plating (degradation) of a polarization sensor (PS), providing accuracy of maintaining a constant potential of the reference electrode.

3 cl, 4 dwg, 1 tbl