Cathode protection shielding effect testing device and method

Abstract

The invention discloses a cathode protection shielding effect testing device and method, and belongs to the field of pipeline corrosion protection. The cathode protection shielding effect testing device comprises a measuring assembly, a power supply assembly and a pipeline simulation assembly located in an electrolyte solution. The pipeline simulation assembly comprises a substrate, a plurality of electrodes arranged on the substrate in an array mode and an anti-corrosion layer laid on the electrodes. By means of the device, the relation between the anti-corrosion layer stripping parameters of the pipeline and the shielding effect of the cathode protection current can be obtained through testing, and then the cathode protection shielding problem of the pipeline can be evaluated and solved conveniently according to the relation. And the device can be used for measuring and analyzing the cathode protection shielding effect of the pipeline, so that the problem that the cathode protection shielding effect cannot be tested and analyzed on site in the prior art is solved. Therefore, an effective solution is provided for the cathode protection shielding effect of the pipeline anti-corrosion layer stripping area.

Description

technical field [0001] The present application relates to the technical field of pipeline corrosion protection, in particular to a cathodic protection shielding effect testing device and method. Background technique [0002] At present, the combined application of anticorrosion coating and cathodic protection is the most commonly used measure to prevent pipeline corrosion. Among them, the anti-corrosion layer is the first barrier for pipeline protection, and its integrity is directly related to the service life of the pipeline. In practical applications, the anticorrosion layer of the pipeline will be partially stripped due to aging, and the stripping of the anticorrosion layer will shield the cathodic protection current to a certain extent, resulting in too small or uneven distribution of the cathodic protection current in the stripped area of ​​the anticorrosion layer, and the pipeline metal in the stripped area Corrosion occurs without effective protection. [0003] At ...

AI Technical Summary

Problems solved by technology

In practical applications, the anticorrosion layer of the pipeline will be partially stripped due to aging, and the stripping of the anticorrosion layer will shield the cathodic protection current to a certain extent, resulting in too small or uneven distribution of the cathodic protection current in the stripped area of ​​the anticorrosion layer, and the pipeline metal in the stripped area Corrosion occurs without effective protection

[0003] At present, the equipment used to test the cathodic protection effect of buried steel pipelines is limited to measuring the potential of the opening area where the anticorrosion layer is damaged. The cathodic protection current distribution and the cathodic protection shielding problem in the stripped area cannot be detected, and it is difficult to evaluate the stripped area Cathodic protection effect of inner tube body metal

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