Electrochemical test method and device based on automatic coating and micro-liquid pool

Abstract

The invention discloses an electrochemical test method and device based on automatic coating and a micro-liquid pool, and relates to the technical fields of metal corrosion, automatic coating technology, micro-area electrochemistry and systematic data accumulation and application. The electrochemical test device comprises an automatic coating system, a micro-liquid pool test system, a test liquidupdating system, a high-precision XYZ three-dimensional mobile platform, a microscopic monitoring system, an electrochemical test system, a storage and control system and a connecting system for controlling effective transmission of control commands and test data among the systems. The device adopts a modular design, has high expandability, combines an automatic coating technology with a micro-liquid pool test system, carries out instant electrochemical sample sealing and measurement on a target research area of a sample under a microscope, accurately controls the reaction area of a working electrode, has a high solution amount/reaction area ratio of the working electrode, can reduce the influence of reaction products, eliminate crevice corrosion, and reduce the risks of liquid leakage, blockage and oxygen diffusion, has lower solution resistance in a test process, and realizes automatic sample sealing and measurement of micro-area electrochemistry.

Description

technical field [0001] The invention relates to the technical fields of metal corrosion, automatic coating technology, micro-area electrochemistry and systematic data accumulation and application. In particular, it relates to an electrochemical testing method and device based on automatic film covering and micro liquid pool. Background technique [0002] The composition and distribution of metal materials, microstructure, defects in materials, stress conditions (including internal stress of materials and external stress) and other factors may affect the corrosion behavior of metal materials (corrosion type and corrosion resistance). rate) have an effect. When metals with the same macroscopic composition differ in their microstructure and composition distribution, not only the corrosion rate but even the corrosion mechanism may be different in the same solution. When traditional electrochemical techniques are used to study localized corrosion of metals, the exposed area of ...

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Problems solved by technology

[0008] In view of the above technical problems, the present invention provides an electrochemical testing method and device based on automatic film coating and micro-liquid pool, which can electrochemically seal and measure the target area of ​​the metal sample under the microscope in real time, and overcome the existing micro-area electrochemical testing method and device. The problems and defects in the methods and devices in the chemical measurement technology, such as liquid leakage, oxygen diffusion, high ohmic resistance, etc., ensure the scientificity and rigor of the metal micro-area electrochemical measurement process, and improve the electrochemical performance of the metal sample micro-area. Measurement efficiency

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