METHOD FOR STEEL PIPELINES POLARISATION POTENTIAL MEASUREMENT Russian patent published in 2018 - IPC G01R19/00 C23F13/02 

FIELD: measuring equipment.

SUBSTANCE: in the method for steel pipeline polarisation potential measurement, it is proposed to change the polarisation current is by changing the resistance of an electrical circuit consisting of the first, second and third resistors connected in series and connected to the two inputs of the pipeline polarisation potential measurement circuit, connected respectively to the measuring point and to the reference electrode. First, the voltage drop U₁ from the flowing polarisation current on the first and second resistors connected to the measuring point output are amplified and measured, and further increase the polarisation current by shunting the first and second resistors of the electrical circuit, the amplified voltage drop U₂ is measured and the polarisation potential U_p is determined by the formula , where R₁ is the resistance of the first resistor connected to the measuring point output; R₂ is the resistance of the second resistor; R₃ is the resistance of the third resistor connected to the reference electrode output; K_y is voltage drop gain; .

EFFECT: increased accuracy of polarization potential measurement without changing the energy parameters of the cathodic protection station and the reliability of information on the steel pipelines security.

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