Corrosion electrolytic cell device suitable for considering the effect of stress gradient

Abstract

The invention discloses a corrosion electrolytic cell device suitable for considering the influence of stress gradient, which is characterized in that it comprises: cylinder body I and cylinder body II connected in series, a partition between the two cylinder bodies, and a separator located in the series cylinder The end plates at both ends of the body and the stress loading devices at both ends; the counter electrode is provided in the separator, the working electrode can be provided in the end plates at both ends, and the input port for setting the reference electrode is provided on the top of the cylinder 1; by changing the structure of the existing electrolytic cell, the real-time monitoring of the electrolyte characteristics is satisfied, and the requirements for the electrolyte temperature, dissolved oxygen content, flow rate, and pH value are convenient to realize in the test, and this invention can also ensure the stability of the test sample The working area saves the traditional preparation work of sealing the sample to ensure the working area, and at the same time, it is convenient to apply stress load to the sample, which reduces the requirements for the loading device, and both ends of the electrolytic cell structure allow the application of load to the sample. It can be applied to corrosion battery research considering the influence of stress gradient. Reasonable assurance of test condition requirements, easy to achieve the accuracy and efficiency of measurement data.

Description

technical field [0001] The invention relates to a corrosion electrolytic cell device suitable for considering the influence of stress gradient. Involving patent classification number C25 electrolysis or electrophoresis process; the equipment used by it C25B electrolysis process or electrophoresis process for producing compounds or non-metals; the equipment used by it C25B9 / 00 electrolytic cell or its assembly; electrolytic cell components; assembly of electrolytic cell components , For example, the electrode-membrane assembly C25B9 / 06 includes an electrolytic cell with a dimensionally stable non-moving electrode; an assembly of its components. Background technique [0002] At present, when the existing electrolytic cell is used for the three-electrode electrochemical corrosion measurement test, the test devices and methods used are mainly as follows: figure 1 As shown: the shortcomings of the equipment are mainly reflected in: difficult assembly, inconvenient assembly of th...

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Problems solved by technology

[0002] At present, when the existing electrolytic cell is used for the three-electrode electrochemical corrosion measurement test, the test devices and methods used are mainly as follows: figure 1 As shown: the shortcomings of the equipment are mainly reflected in: difficult assembly, inconvenient assembly of the test device; water leakage at the connection between the test piece and the electrolytic cell, resulting in errors in electrochemical measurement; the non-measurement parts of the test piece must be sealed with epoxy resin, It cannot be reused, and the material of the test piece is excessively wasted; without good aeration conditions, the stability of the dissolved oxygen content in the electrolyte cannot be guaranteed when the corrosion test is carried out for a long time; it is difficult to ensure the constant temperature of the solution without disturbing the electrolyte solution; It is difficult to adjust the flow rate of the electrolyte solution; it is difficult to measure the characteristics of the electrolyte regularly, and often cannot meet the constant and regular detection requirements for the pH value, temperature, and dissolved oxygen of the electrolyte; when studying the corrosion test under the influence of stress, it is necessary to load the sample However, limited by the design of the electrolytic cell, the loading direction is simplified; in addition, for the galvanic corrosion measurement under the influence of the stress gradient, two methods are currently used, one is for two samples of the same material (working electrode and The material of the auxiliary electrode is the same), the working electrode is loaded and the auxiliary electrode is not loaded, such as figure 1 As shown, the galvanic current between the two is measured to achieve the purpose of the test, but in reality, due to the different stress positions of the structure and the composition of the components, the overall structure is often in a state of uneven stress, and few parts will be in a stress-free state. Therefore, through the traditional loading and non-loading methods, it is difficult to measure the galvanic current between the two to simulate the corrosion of the engineering structure under the stress gradient; locations at different stress levels and placed in conventional electrolyzer vessels such as figure 2 As shown, the main problem is that the stress gradient battery makes the electrons inside the sample automatically migrate, and it is difficult to measure the galvanic current through the outside of the sample.

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