High-voltage reference electrode, preparation method and application

Abstract

The invention belongs to the technical field of deep sea high-voltage electrochemistry, and discloses a high-voltage reference electrode, a preparation method and application. A silver / silver chlorideelectrode is inlayed with a silver wire; the silver wire penetrates through a corrosion-resistant alloy tube suspended at the upper part of the silver / silver chloride electrode; the lower parts of the silver / silver chloride electrode and the corrosion-resistant alloy tube are packaged in a PVC pipe; epoxy resin is packaged between the silver wire and the corrosion-resistant alloy tube and betweenthe lower parts of the silver / silver chloride electrode and the corrosion-resistant alloy tube and the PVC pipe. A part of a silver sheet is pressed into an electrode, a part of the silver sheet is exposed to be connected with a wire, the defect of poor powder weldability is avoided, meanwhile, the wire is sleeved with a sleeve, and the defect that the silver wire is broken easily is overcome. The bottom of a wire channel is also sealed in the PVC pipe, so that the sealing performance and the practicability are greatly improved. The prepared electrode is used in a deep sea high-voltage environment, is not liable to be polarized, and is high in stability and data reliability. The prepared electrode can be used for a long time in the deep-sea high-pressure environment.

Description

technical field [0001] The invention belongs to the technical field of deep-sea high-voltage electrochemistry, and in particular relates to a high-voltage reference electrode, a preparation method and an application. Background technique [0002] At present, the cathodic protection method is generally used for the corrosion protection of metal structures in the deep sea environment. The reference electrode is used to accurately measure the electrode potential of the metal and its structures in the environment, and the cathodic protection of the metal and its structures. The marine environment, especially the deep-sea environment, has a harsh corrosion environment. Common corrosion parameters include hydrostatic pressure, low temperature, low dissolved oxygen content, salinity, pH, etc. The complex environmental parameters make the deep-sea environment a harsher service environment than the surface marine environment. . Therefore, it is very important to design a reference e...

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Problems solved by technology

[0008] In response to the above problems, some people use the method of pressing the silver wire into the powder, and leave a part as the lead wire for welding. However, the silver wire is easily broken during the process of making electrodes in this way, which limits the electrode production.

In the existing technology, the electrodes are directly encapsulated with epoxy resin, and there is not much protection for the lead wires. The electrode wires made in this way are easy to be damaged, which will greatly affect the service life.

[0009] The significance of solving the above problems and defects is: these defects seriously affect the normal operation of the high-voltage reference electrode, which will cause the electrode measurement error to be too large or even fail

Losing the function of accurately measuring the electrode potential will cause misjudgment and even cause huge economic losses. Therefore, designing a suitable high-voltage reference electrode is of great significance for measurement

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