Polarization testing probe and testing method for cathodic protection of underground steel pipelines

Abstract

The invention relates to a polarization testing probe and a testing method for cathodic protection of underground steel pipelines, and the invention is mainly used for measurement of polarization potentials of cathodic protection of underground steel pipelines. The probe provided in the invention is used for simulating a leakage point on a coating of an underground steel pipeline, and comprises an insulation shell, a testing sample, a reference electrode and cables, wherein, the insulation shell comprises an upper cavity and a lower cavity, the upper cavity is filled with an insulation sealing material, the lower cavity is further divided into an inner hollow cavity and an outer hollow cavity, the reference electrode is arranged in the inner hollow cavity, the outer hollow cavity is filled with the insulation sealing material, the testing sample is installed at the bottom of the insulation shell at the outer hollow cavity, the testing sample and a simulated steel pipeline are made of a same material, the testing sample is electrically connected with a cable, the interconnecting part of the testing sample and the cable is subjected to insulation and anti-corrosion treatment, one end of the reference electrode extends into the upper cavity and is electrically connected with a cable, the interconnecting part of the end of the reference electrode and the cable is subjected to insulation and anti-corrosion treatment, the other end of the reference electrode contacts with soil, and the cables both extend out from the top of the insulation shell.

Description

field of invention [0001] The invention relates to the technical field of cathodic protection detection, in particular to a buried pipeline cathodic protection polarization test probe and a test method, which are mainly used for measuring the cathodic protection polarization potential of buried steel pipelines. Background technique [0002] Cathodic protection has been widely used as an economical and effective method to prevent corrosion of buried steel pipelines. Polarization potential is a key parameter of cathodic protection, which marks the degree of cathodic polarization and is the key to monitor and control the cathodic protection effect. important indicators. Therefore, accurate measurement of polarization potential is of great significance to ensure the effective implementation of cathodic protection technology. [0003] After the buried steel pipeline adopts cathodic protection, the IR drop caused by the current flowing in the soil will bring errors to the measure...

AI Technical Summary

Problems solved by technology

Due to the late start of research and development on cathodic protection polarization probes at home and abroad, there are few related reports, and there are few products available on the market at present. There are many deficiencies in life and function. The main problem is that the service life of the test probe is limited. Since the test probe needs to be buried and used, it needs a long service life. Around the problems existing in the current buried pipeline cathodic protection polarization potential test, a research has been carried out. Related research, on the basis of the research results, a buried pipeline cathodic protection polarization potential test probe was developed

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