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Cathode protection shielding effect testing device and method

A cathodic protection and shielding effect technology, applied in the field of cathodic protection shielding effect testing devices, can solve problems such as unevenness, pipeline metal cannot be effectively protected, and cathodic protection shielding problems cannot be detected.

Pending Publication Date: 2022-05-17
PETROCHINA CO LTD
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  • Abstract
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  • Claims
  • Application Information

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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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  • Cathode protection shielding effect testing device and method
  • Cathode protection shielding effect testing device and method
  • Cathode protection shielding effect testing device and method

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Embodiment Construction

[0040] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0041] figure 1 It is a schematic structural diagram of a cathodic protection shielding effect test device shown in the embodiment of the present application. The cathodic protection shielding effect test device can obtain the current distribution on the surface of the metal test piece under the condition of peeling off the anticorrosion layer. The cathodic protection shielding effect test device Includes measurement components, power components, and pipeline simulation components.

[0042] Among them, the measurement component is used to obtain the current value on multiple electrodes in the pipeline simulation component. The measurement component can be an ammeter, or the measurement component can include a standard resistor an...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F13/22
CPCC23F13/22
Inventor 钟婷陈振华毕武喜李莉田磊祁惠爽刘猛张立新温玉芬徐承伟
Owner PETROCHINA CO LTD
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