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Corrosion-resistant all-solid electrode for detecting marine electric field and preparation method thereof

An anti-corrosion, all-solid-state technology, applied in electrostatic field measurement, measuring devices, and measuring electrical variables, etc., can solve problems such as poor pressure and various stress tolerance, weak anti-interference ability of ions, and low mechanical strength of electrodes. Achieve the effect of improving corrosion resistance, large ion abundance, and avoiding weak combination

Active Publication Date: 2019-02-01
圣岭科技有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] Aiming at the technical problems that the existing electrode has low mechanical strength, poor resistance to pressure and various stresses in the ocean, weak anti-interference ability to various ions in the ocean, easy to be corroded by seawater, and short service life, the present invention proposes a Corrosion-resistant all-solid-state electrode for marine electric field detection and its preparation method

Method used

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  • Corrosion-resistant all-solid electrode for detecting marine electric field and preparation method thereof
  • Corrosion-resistant all-solid electrode for detecting marine electric field and preparation method thereof

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Embodiment 1

[0024] Such as figure 1 As shown, the anti-corrosion all-solid-state electrode for marine electric field detection of the present invention has a structure including an electrode body, a sealing ring 5 and a copper pillar 6 . The main body of the electrode is made of silver wire 1 as the base material, which is covered with AgCl coating 2, quaternized chloromethyl polystyrene coating 3 and sulfonated polyaryletherketone-Nafion composite film 4 sequentially from the inside to the outside.

[0025] The electrode preparation method is as follows:

[0026] 1) AgCl coating: After polishing a section of silver wire with sandpaper, ultrasonically clean it in acetone and ultrapure water for 10 minutes, then immerse it in 0.1 M hydrochloric acid solution, and use constant current method at a current density of 0.5 mA / cm 2 Under the conditions of the reaction for two hours, a layer of dense AgCl coating grows on the surface of the silver wire;

[0027] 2) Quaternized chloromethyl poly...

Embodiment 2

[0031] The electrode of the present invention and the common Ag / AgCl electrode were put into simulated seawater to test their corrosion resistance. In order to make the experimental phenomenon more obvious, the Br in seawater will be simulated - The content was increased from 0.008 mol / L to 0.03 mol / L to speed up the corrosion rate. At the same time, the point changes of the two electrodes relative to the standard calomel reference electrode were tested. The experimental results are as follows figure 2 .

[0032] It can be known from the experiment that the Ag / AgCl electrode without anti-corrosion coating treatment is in the Br - After soaking in the rich simulated seawater for about 80 minutes, the potential began to decrease rapidly, which was mainly due to the Br - Cl in the double layer - The competition caused by fouling the AgCl coating at the same time, and the response of the corroded electrode to the electric field is greatly weakened. In contrast, the potential ...

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Abstract

The invention discloses a corrosion-resistant all-solid electrode for detecting marine electric field. The electrode uses silver wires as substrate, covered by an AgCl coating, a quaternized chloromethyl polystyrene coating, and a sulfonated polyaryletherketone-Nafion composite membrane from the inside to the outside. The end of the solid electrode is connected to a copper post, and sealed by a sealing ring. The invention also provides a preparation method of the above electrode. The method comprises: growing silver chloride coating on the surface of the silver wires substrate by the galvanostatic method; preparing quaternized chloromethyl polystyrene by quaternization reaction; coating the electrode distribution with the quaternized chloromethyl polystyrene coating and the sulfonated polyaryletherketone-Nafion composite membrane; annealing the electrode under nitrogen protection and then packaging. The corrosion-resistant all-solid electrode prepared by the preparation method has highsensitivity, stable performance, high mechanical strength, and good resistance to contamination of Br- and I- ions in seawater, which is very suitable for long-term detection of electric field in a marine environment.

Description

technical field [0001] The invention relates to an electric field sensor, in particular to a corrosion-resistant all-solid-state electrode for ocean electric field detection. Background technique [0002] The marine environment is complex and changeable. Factors such as seawater flow migration, biological movement, changes in the earth's magnetic field, redox reactions of ships and seabed metal ore bodies can all generate electric fields in the marine environment. At the same time, the magnitude of the ocean electric field is considerable and the signal is abundant. Therefore, the detection technology of the ocean electric field has a wide range of application fields and important research significance. [0003] According to the requirements of marine electric field detection, silver / silver chloride electrodes have good stability, extremely low self-noise and good signal response ability among the electrode types that have been studied more at present, and are widely used in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/12G01R3/00
CPCG01R3/00G01R29/12
Inventor 林君王泽臣辛青臧月杨国卿赵巨峰
Owner 圣岭科技有限公司
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