Semisolid reference electrode used for metal soil corrosion electrochemical system

Abstract

The invention discloses a semisolid reference electrode used for a metal soil corrosion electrochemical system. The semisolid reference electrode comprises a salt bridge, an electrode cavity and an electrode inner core, the salt bridge comprises a polytef shell of a cylindrical structure, a saturated electrolyte chamber is arranged in the middle of the salt bridge longitudinally, a saturated electrolyte is a semisolid saturated potassium nitrate or saturated potassium chloride, a porous sand core A is arranged at the end of the saturated electrolyte chamber, the top end of the porous sand core A directly contacts with soil, the electrode cavity is connected with the polytef shell through a thread, and the electrode inner core is connected with the electrode cavity through a thread. Medium-long-term running of the semisolid reference electrode in a soil medium is realized while good sealing effect of the electrolyte in the reference electrode and the salt bridge is guaranteed with temperature conditions changed constantly, so that accuracy and smoothness of metal corrosion electrochemical experiments in the soil medium are guaranteed.

Description

technical field [0001] The present invention relates to a metal soil corrosion electrochemical test device, in particular to a reference electrode used in a metal corrosion electrochemical test system in a soil medium. Background technique [0002] Gas pipelines, oil pipelines, municipal water supply pipelines and other metal pipelines are buried underground all year round and suffer from severe soil corrosion. Metal soil corrosion reduces the effective wall thickness of the pipeline. When the pressure on the pipeline exceeds the compressive strength of the pipeline, it may cause pipe burst and Events such as pipe network leakage have caused certain economic losses, so it is of great significance to study the soil corrosion characteristics of metals. [0003] Electrochemical means to measure the corrosion characteristics of metals has been widely used due to its fast and accurate characteristics. The reference electrodes in the metal soil corrosion electrochemical measureme...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect that the electrolyte of the salt bridge of the reference electrode in the measurement of the existing electrochemical metal corrosion characteristics is easy to lose in the soil medium and affect the experimental measurement effect, and to provide a method that can be used for long-term experiments and can be used during heating. Under a variety of experimental conditions, the electrolyte of the reference electrode and the salt bridge in the electrochemical system will not be lost, and the reference electrode that can ensure the accuracy of the measurement

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