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Method for preparing high-temperature electrochemical working electrode

A working electrode and electrochemical technology, which is applied in the field of high-temperature working electrodes and the preparation of working electrodes in high-temperature electrochemical systems, can solve the problem of less electrochemical systems and working electrodes, less preparation methods, difficulty in melt processing and forming, hydrophobicity and adhesion of bubbles, etc. question

Inactive Publication Date: 2010-09-08
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although polytetrafluoroethylene and polytrifluoroethylene have good heat resistance, they can be used for a long time under high temperature conditions of 250-260°C; they also have good chemical stability, electrical insulation and corrosion resistance; but they are not easy to melt process Forming and processing are difficult, which can easily lead to leakage of the encapsulated electrode, resulting in the scrapping of the electrode, and its hydrophobic property is easy to make bubbles adhere to the surface of the electrode during measurement, affecting electrochemical measurement
Therefore, there are few preparation methods for electrochemical systems and working electrodes at 150-250 °C

Method used

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  • Method for preparing high-temperature electrochemical working electrode
  • Method for preparing high-temperature electrochemical working electrode
  • Method for preparing high-temperature electrochemical working electrode

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Select two φ4mm×20mm SUS304 stainless steel columns and connect them with φ1mm constantan wires by spot welding. Choose 20mm×20mm×15mm high-density insulation board as the base material, and fix two welded metal working electrode columns in the middle of the base. Choose a 30mm long φ20mm×2mm PVC pipe to fit on the base from the top of the electrode, and put the PVC pipe into the bottom of the base. Remove the excess base outside the PVC pipe, and wrap the base and the connection between the base and the PVC pipe with aluminum foil to avoid leakage of the filling material. Then pour the evenly mixed Portland cement into the grinding tool, and place it in a constant temperature system at 30°C for 24 hours. Afterwards, the temperature of the system was raised to 180°C to soften the PVC pipe and peel off the electrode body. After the aluminum foil and the base are removed, the surface of the electrode is mechanically ground and polished to obtain a high temperature resis...

Embodiment 2

[0022] Select two φ4mm×20mm carbon steel columns and connect them with φ1mm copper wires by spot welding. Choose 20mm×20mm×15mm high-density insulation board as the base material, fix 2 welded metal working electrode columns on the base and put a 30mm long φ20mm×2mm PVC pipe on the base from the top of the electrode. Use aluminum foil to wrap the base and the connection between the base and the PVC pipe to avoid leakage of filling materials. Then pour the evenly mixed Portland cement into the grinding tool, and place it in a constant temperature system at 30°C for 24 hours. Afterwards, the temperature of the system was raised to 180°C to soften the PVC pipe and peel off the electrode body. After the aluminum foil and the base are removed, the surface of the electrode is mechanically ground and polished to obtain a high temperature resistant carbon steel double working electrode.

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Abstract

The invention relates to a method for preparing a high-temperature electrochemical working electrode, and belongs to the technical field of electrochemical corrosion measurement and material characterization. The method is characterized in that: a welded double electrode is fixed in a base; a PVC pipe at a proper size is connected with the base and is sealed by an aluminum foil; commonly used Portland cement is used as a packaging material; the ordinary PVC pipe is used for packaging an infusion grinding tool; and finally, the PVC pipe is softened and stripped at a high temperature to prepare the high-temperature working electrode with high corrosion resistance and high temperature resistance. The whole working electrode is divided into two work testing parts and is convenient to monitor electrochemical noise under a high-temperature corrosion condition. The method has the advantages of low cost, simple process and easy operation, and is favorable for accurately monitoring the material corrosion performance in real time in the corrosion process under the high-temperature corrosion condition. The method is suitable for all metal matrixes for electrochemical detection, such as stainless steel, carbon steel and the like, and can be used in law measurement, mechanism inspection and characterization of material performance in a corrosive environment.

Description

technical field [0001] The invention belongs to the technical field of electrochemical corrosion measurement and material characterization, and relates to a preparation method of a working electrode in a high-temperature electrochemical system. It is particularly related to: using common Portland cement as the packaging material, and using ordinary PVC pipes to package the perfusion abrasives to prepare a high-temperature working electrode with strong corrosion resistance and high temperature resistance. In addition, the whole working electrode is divided into two working detection parts, which is a method for preparing a high-temperature electrochemical working electrode that is convenient for electrochemical noise monitoring under high-temperature corrosion conditions. Background technique [0002] Electrochemical research and determination include ordinary electrochemical polarization, cyclic voltammetry, AC impedance and the emerging electrochemical noise methods. Becau...

Claims

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Application Information

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IPC IPC(8): G01N27/30
Inventor 马学虎陈宏霞陈嘉宾白涛
Owner DALIAN UNIV OF TECH
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