| 摘要 |
A method for estimation of proofness of underground steel pipelines from corrosion at which potential difference is formed between underground steel pipeline in measurement point and comparison electrode which to be on surface of ground above axis of underground steel pipeline, obtained difference of potentials in different number of times is decreased, proofness of underground steel pipelines from corrosion is estimated on value of polarizing potential of underground steel pipeline and resistance of surrounding pound which is determined under the formula. The decrease of obtained potential differences in different number of times is carried out by connection of electric circuit from three resistors between measurement point and comparison electrode, then potential differences in connected circuit on two resistors from side of comparison electrode are determined and strengthened it and obtained potential differences U, two resistors from side of measurement point is bridged, new potential differences on extreme from side of comparison electrode of resistors is measured and strengthened it and strengthened potentialdifferences Uare obtained, obtained potential differences are compares, resistance of resistor from side of comparison electrode is changed, comparative differences of potentials is juxtaposed before achievement of their equality. |
