Device and method for monitoring failure rule of anticorrosive coating in stressed pipeline in real time

A real-time monitoring and internal anti-corrosion technology, applied in pipeline systems, mechanical equipment, gas/liquid distribution and storage, etc., can solve problems such as the lack of corrosion inhibitor coating monitoring methods, and achieve true and reliable test results and consistent initial status. , the effect of facilitating promotion

Inactive Publication Date: 2014-06-04
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
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Problems solved by technology

With the continuous operation of the pipeline, the corrosion inhibitor coating gradually fails due to the scouring of the mainstream medium of the pipeline, but there is no reliable monitoring method for the failure of the corrosion inhibitor coating

Method used

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  • Device and method for monitoring failure rule of anticorrosive coating in stressed pipeline in real time
  • Device and method for monitoring failure rule of anticorrosive coating in stressed pipeline in real time
  • Device and method for monitoring failure rule of anticorrosive coating in stressed pipeline in real time

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] A device for monitoring the failure law of an anti-corrosion coating film in a pressurized pipeline, comprising: an external flange 1, an external pipe section 2, an outer sleeve 5, an inner sleeve 6 and a test electrode, the external flange 1 is connected to the test pipeline, Outer casing 5 is connected with outer connecting pipe section 2 by fastening bolts 10 and is provided with a sealing ring 9. The inner casing 6 is evenly distributed with electrode jacks 4 in the circumferential direction, and the test electrodes are embedded in the electrode jacks 4, which are kept in contact with the inner wall of the inner casing 6. In the same plane, the outer sleeve 5 is provided with an outlet 7 for leading out the connecting electrode wire 14, and the inner sleeve 6 is provided with a pressure balance hole 8 to keep the pressure on both sides of the...

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Abstract

The invention discloses a device and method for monitoring the failure rule of an anticorrosive coating in a stressed pipeline. The device comprises an external flange, an external pipe section, an external sleeve, an internal sleeve and a testing electrode, wherein the external flange is connected with a testing pipeline; the external sleeve is connected with the external pipe section through a fastening bolt; electrode jacks are uniformly distributed on the circumference of the wall of the internal sleeve; the testing electrode is embedded in the electrode jacks; a wire outlet is formed in the external sleeve; a pressure balancing hole is formed in the internal sleeve; the testing electrode comprises a cathode, an anode and a wire; the inner and outer side faces of the anode, the bottom surface of the wire and the side face of the cathode are sealed by insulating materials; the bottom surfaces, which are not connected with the wires, of the anode and the cathode are coated with a corrosion inhibitor coating; the wire is externally connected with a current signal testing device. The device and method have the beneficial effects that test results are real and reliable, continuous monitoring can be realized, manual attendance is not needed, and the device is conveniently popularized.

Description

technical field [0001] The invention relates to a method for monitoring corrosion conditions in a pipeline with pressure, in particular to a method for monitoring the failure law of an anti-corrosion coating in a pipeline with pressure. Background technique [0002] Coating corrosion inhibitors on the inner wall of pipelines is an effective measure for pipeline anticorrosion. The adsorption mechanism of corrosion inhibitors commonly used in industrial pipelines and pipeline materials is mainly: 1. Electrostatic attraction between corrosion inhibitor molecules and the charge on the metal surface; 2. Metal atoms Fe contains unoccupied empty d orbitals, which are easy to form coordination bonds with negatively charged polar groups of corrosion inhibitors. With the continuous operation of the pipeline, the corrosion inhibitor coating gradually fails due to the scouring of the mainstream medium of the pipeline, but there is no reliable monitoring method for the failure of the cor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/20F17D5/00
Inventor 刘刚陈雷卢兴国马杰隋冰翟克平
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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