Metal corrosion electrochemical experiment device used in soil medium

Abstract

The invention discloses a metal corrosion electrochemical experiment device used in a soil medium. The metal corrosion electrochemical experiment device comprises an experiment bottle, an electrode, a sealing plug and electrode sealing holes, wherein the sealing plug is arranged in a bottleneck of the experiment bottle; an edge support is arranged at the transverse middle position of the sealing plug; a sealing ring A is arranged at a joint of the position below the edge support and the bottleneck; a working electrode sealing hole, a reference electrode sealing hole and an auxiliary electrode sealing hole are formed in the sealing plug and are tightly attached with corresponding electrodes; a reference electrode comprises a salt bridge; saturated electrolyte in the salt bridge is a semi-solid saturated electrolyte; a perforating screw cap is arranged at the bottleneck of the experiment bottle and is matched with the experiment bottle through threads to press the edge support so as to guarantee well sealing of the experiment device. According to the metal corrosion electrochemical experiment device, the influence caused by soil water evaporation due to long-time experiment and change of the experiment environment is avoided; the experiment device is small in size and portable; the change of the experiment device and the environment does not affect the working states of the experiment electrodes.

Description

technical field [0001] The invention relates to an electrochemical experiment device, in particular to a metal corrosion electrochemical experiment device used in soil medium. Background technique [0002] Metal pipes buried in the ground are buried underground all year round, and the interaction with the soil causes external corrosion of the pipes, which is one of the main failure modes of buried pipes. The electrochemical test method can accurately and continuously monitor the corrosion rate of metals in soil and the characteristics of surface corrosion, and has been widely used in the experimental research of metal soil corrosion. [0003] The existing electrochemical research media for metal soil corrosion are mainly soil simulation solution and actual soil. The soil simulation solution refers to the solution configured according to the physical and chemical properties of the soil. Since the actual soil porosity, humidity and other complex soil environmental factors are ...

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Problems solved by technology

[0003] The existing electrochemical research media for metal soil corrosion are mainly soil simulation solution and actual soil. The soil simulation solution refers to the solution configured according to the physical and chemical properties of the soil. Since the actual soil porosity, humidity and other complex soil environmental factors are not considered, the results It is quite different from the actual soil corrosion

In order to make the correlation between the laboratory test results and the actual metal soil corrosion higher, the actual soil is generally used as the soil corrosion electrochemical test medium, but due to the slow corrosion rate of the metal soil, the experiment period is long, and the evaporation of soil moisture during the experiment affects the experimental results. At the same time, cumbersome operations such as regular detection of soil moisture and uniform water replenishment limit the research of electrochemical methods on metal corrosion in soil media.

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