Universal electrolytic tank for electrochemical testing

Abstract

The invention relates to the technical field of electrochemical electrolytic tanks, in particular to a universal electrolytic tank for electrochemical testing. The universal electrolytic tank comprises an electrolytic cell. The upper end of the electrolytic cell is fixedly connected with a support frame. The lower end of the electrolytic cell is fixedly connected with a base. A first hole is formed in the surface of a bottom plate of the electrolytic cell, the lower end of the first hole communicates with a first mounting groove, a working electrode is arranged in the first mounting groove, anelectrode clamp is arranged outside the working electrode and fixed to the lower end of the bottom plate, and a drainage hole is formed in the position, adjacent to the side wall of the electrolyticcell, of the bottom plate. An adjusting stud and four guide columns are installed on the supporting frame, the guide columns are detachably and fixedly connected to the supporting frame, the lower ends of the guide columns abut against the upper end of the bottom plate, and the lower end of the adjusting stud is connected with an auxiliary electrode clamp through an adjusting mechanism. Accordingto the invention, it can be ensured that the working electrode and the auxiliary electrode can be aligned when an electrochemical test is carried out on an electrolytic tank at present, and the position of the auxiliary electrode and the distance between the two electrodes are adjustable, so that a more accurate electrochemical test result is obtained.

Description

technical field [0001] The invention relates to the technical field of electrochemical electrolytic cells, in particular to a general electrolytic cell for electrochemical testing. Background technique [0002] The electrolytic cell is a necessary experimental device for electrochemical testing of metal corrosion. Commonly used electrolytic cells include glass cup type and H-type glass electrolytic cells. These electrolytic cells are easy to use, but the samples need to be sealed. Sealing metal samples with epoxy resin is a common sample preparation method for electrochemical testing. However, the sample preparation steps using resin are cumbersome, and there is crevice corrosion between the resin and the sample, which will affect the electrochemical test results. In addition, after the electrochemical test, the working electrode sealed with epoxy resin is inconvenient for subsequent material analysis of the same sample (such as observing the surface morphology of the samp...

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Problems solved by technology

Secondly, the auxiliary electrode generally faces the working electrode, and its position and distance from the working electrode will cause the difference in the solution resistance, which will lead to the difference in the experimental results.

However, in the current three-electrode system, the auxiliary electrode is usually directly inserted into the electrolyte from the upper opening of the electrolytic cell. On the one hand, the insertion depth is not fixed, and it cannot be guaranteed that the auxiliary electrode is always facing the working electrode; The distance between them cannot be adjusted, and an inappropriate position may lead to large errors in electrochemical results

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