Electrolytic cell for stereo microscope in-situ corrosion analysis

Abstract

An electrolytic cell for stereo microscope in-situ corrosion analysis is characterized in that the electrolytic cell is cylindrical or rectangular. The electrolytic cell comprises a cylinder body, a cylinder cover, a cylinder bottom and bolts. The cylinder cover and the cylinder bottom are connected with each other through the bolts. A liquid feeding cylinder, an exhaust hole, a reference electrode inserting hole, an observation window, a counter electrode wiring terminal, a working electrode connector are sequentially disposed on the cylinder body from left to right. A stirring magneton is disposed in the middle of the cylinder bottom. The liquid feeding cylinder is inserted into the middle lower portion of the cylinder body vertically. A sealing rubber plug provided with an air inlet pipe and an air outlet is disposed at the upper end of the liquid feeding cylinder. The air inlet pipe is inserted into the lower portion of the liquid feeding cylinder vertically. The air outlet is located at the upper end of the liquid feeding cylinder. An aerator is disposed at the lower end of the air inlet pipe. A rubber plug is disposed on the exhaust hole on the cylinder cover. A reference electrode is inserted into the reference electrode inserting hole. An annular platinum sheet counter electrode is disposed on the cylinder cover on circumference of the bottom face of the observation window. The working electrode connector is inserted into the upper portion of the cylinder body vertically. A testing sample which is placed horizontally is fixed to the lower end of the working electrode connector through a bolt or a clamping ring.

Description

technical field [0001] The invention relates to a corrosion electrochemical experiment device, in particular to an electrolytic cell suitable for in-situ corrosion analysis with a stereo microscope. Background technique [0002] Using a stereo microscope to observe the evolution of material surface corrosion morphology in situ has unique advantages, such as not being affected by corrosive media, simple operation, and undistorted images. Especially with the increase in magnification of the stereo microscope, this technology is bound be more widely applied. It can be used as a powerful supplement to probe-mode in-situ corrosion research microscopes such as atomic force microscopes, used for correlation research between macroscopic and microscopic corrosion phenomena, and can also be used for timely monitoring of long-term corrosion research. However, there is currently a lack of electrolytic cell devices dedicated to in-situ corrosion morphology analysis with stereo microscop...

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Problems solved by technology

[0003] 1. It is easy to pollute the mirror body: for the convenience of observation, it is the most common practice to use an open container to carry out in-situ corrosion, but the volatilization and splashing of the corrosive medium will greatly damage the microscope eyepiece; it is difficult to carry out corrosion research work with certain temperature requirements

[0004] 2. Unable to achieve synchronization with electrochemical testing: the open container makes it difficult to fix the electrochemical three-electrode system, and electrochemical testing cannot be carried out, so that the corrosion morphology change and the electrochemical signal cannot be well corresponded, which greatly hinders the revealing of the corrosion mechanism

[0005] 3. High requirements on the stability of the liquid surface: Stereo microscopes rely on visible light reflection imaging. The liquid surface of the corrosive medium undoubtedly provides a light reflection surface. If the liquid surface fluctuates or is affected by air bubbles, the image will be unstable and distorted. Therefore, Difficult to carry out CO 2 、H 2 Ventilation test experiment of corrosive gas such as S and experimental research under agitation of corrosive medium solution

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