Scanning electrochemical microscope electrolytic cell for plate-shaped load sample corrosion research and application thereof

Abstract

The invention relates to a scanning electrochemical microscope electrolytic cell for plate-shaped load sample corrosion research. The electrolytic cell comprises an upper structure and a lower structure, which jointly form an electrolytic cell cavity; the center of the lower structure is provided with a groove; and the upper structure comprises a rectangular frame, the front side wall of the rectangular frame is made of transparent materials, and the left side wall and the right side wall of the rectangular frame are respectively provided with a groove which is communicated with the outside and the electrolytic cell cavity. The invention also relates to a method for corroding the plate-shaped samples by using the electrolytic cell. The structure of the plate-shaped sample transversely passing the electrolytic cell is particularly suitable for corrosion tests of metallic material samples which are stressed and loaded or have residual stress. Therefore, by the electrolytic cell and the application thereof, the plate-shaped sample is subjected to longitudinal mechanical loading by constant load loading or slow strain rate stretching, the real-time and in-situ research on the influence of metallic materials, corrosion medium and mechanical factors on corrosion characteristics and a corrosion rate of metallic materials under the synergistic action can be done, and the microcosmic mechanism on corrosion can be deeply analyzed.

Description

technical field [0001] The invention relates to a scanning electrochemical microscope electrolytic cell used for corrosion research of plate-like load samples and its application. It belongs to the technical field of electrochemical electrolytic cell. Background technique [0002] At present, the scanning electrochemical microscope (SECM) electrolytic cell, which is usually used for corrosion electrochemical research, has a structure with a transparent circular hole at the bottom, and the research sample is inserted into the hole during use. This electrolytic cell is suitable for the research surface ( That is, the working surface) is the cross-section (bottom surface) of a columnar material (such as a metal or alloy bar). The limitations of the combination of the above-mentioned research material (i.e., the matrix electrode) and the electrolytic cell are that the research material must be static during the experiment, and mechanical loading of the sample cannot be achieved...

AI Technical Summary

Problems solved by technology

However, the disadvantages of this invention patent are: (1) the involved electrolytic cell is attached with a double-layer cylinder containing the electrolyte solution, which has a relatively complicated structure; (2) the working electrode is set through a round hole, and the working surface is still columnar Cross-section (bottom surface) of a material such as a metal or alloy

Therefore, for some metal material samples under stress load (such as constant load or slow stretching process) or residual stress, the electrolytic cell of the above structure is not suitable, because the metal material under stress load or residual stress Most of the material samples are plate samples

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