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Metal pipeline corrosion experiment device and method under alternating current and direct current intermittent interference

A technology for metal pipes and corrosion experiments, applied to measuring devices, weather resistance/light resistance/corrosion resistance, instruments, etc., can solve problems such as the lack of a clear understanding of the corrosion mechanism, reduce mutual interference, improve experimental accuracy, and improve accuracy Effects on sex and safety

Pending Publication Date: 2022-01-28
SOUTHWEST PETROLEUM UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Overall, most of the current research on stray currents is still in the separate research on DC or AC stray currents, and there are few studies on metal corrosion under AC-DC intermittent interference, and there are still many shortcomings in the research devices. Many corrosion mechanisms are not yet clearly understood

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  • Metal pipeline corrosion experiment device and method under alternating current and direct current intermittent interference

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Embodiment Construction

[0026] In order to make the problems to be solved in the present invention, technical solutions and advantages clearer, the following combination figure 1 Describe in detail. An experimental device and method for metal pipeline corrosion under AC / DC intermittent interference is composed of metal test piece A14, metal test piece B23, anode pool, cathode pool, DC current interference, AC current interference loop, electrochemical test system A, electrochemical test System B, inflation and exhaust system A, and inflation and exhaust system B are composed. The DC current power supply and the AC power supply are respectively connected to the DC terminal and the AC terminal of the time relay, and the computer data terminal is connected to the time relay to control the switching; the anode pool and the current interference circuit A, the electrochemical test system A, and the charging and exhausting system A , and the metal test piece A14 are connected; the anode pool is connected w...

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Abstract

The invention discloses a metal pipeline corrosion experiment device and a method under alternating current and direct current intermittent interference, and belongs to the field of stray current corrosion and protection. The experiment device consists of a metal test piece, an anode tank, a cathode tank, a direct-current power supply interference, an alternating-current power supply interference, an electrochemical test system, an air charging and discharging system, a time relay and a computer. The direct-current power supply is connected with a direct-current port of the time relay; the alternating-current power supply is connected with an alternating-current port of the time relay, and the time relay controls automatic switching of two power switches. A electrochemical system is composed of the electrochemical test system, a test piece, an auxiliary electrode, a reference electrode and an air charging and discharging device in a solution. And the anode and the cathode of the power supply are led out through the time relay and are connected with an electrochemical corrosion system to form the corrosion experiment device under alternating-current and direct-current intermittent interference. According to the invention, experimental research can be carried out on metal pipeline corrosion under alternating-current and direct-current intermittent interference, and corrosion electrochemical information of the cathode region and the anode region can be measured at the same time.

Description

technical field [0001] The invention relates to the field of stray current corrosion and protection, in particular to a metal pipeline corrosion experiment device and method under intermittent interference of AC and DC. Background technique [0002] Stray current refers to the current flowing outside the designed or specified circuit, and the corrosion caused by stray current to materials is called stray current corrosion. The mileage of my country's subways, AC-DC high-voltage and ultra-high voltage transmission lines, and oil and natural gas pipelines continues to increase. Among them, the DC current leaked from electrified railway lines such as subways will cause DC stray current corrosion to the pipelines, and the high-voltage and ultra-high voltage AC lines drain And and induced current will cause AC stray current to corrode the pipeline. In concentrated areas of railways, AC high-voltage lines, and oil and natural gas pipelines, due to the time limit for the operation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/02
CPCG01N17/02G01N17/006
Inventor 贺三李彬栾启铭邹永莉唐凯薛雅文薛世奇周艾妍
Owner SOUTHWEST PETROLEUM UNIV
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