Suitable for multi-channel corrosion electrolytic cell loading and supporting devices considering the influence of bending stress

Abstract

The invention provides a multi-channel corrosion electrolytic cell loading and supporting device suitable for considering the influence of bending stress, comprising: a PVC base, a PVC upper part, a PVC end plate, a connecting bolt and a loading bolt; the PVC upper part and the PVC The end plate is fixed on the PVC base through a plurality of connecting bolts and welding; the PVC upper part is provided with two rows of holes: hole I and hole II; the upper surface of the PVC base has matching loading bolts The equidistant threaded holes; rotate the loading bolt through the bottom of the PVC base to bend the sample placed horizontally on the workbench, and the two ends of the sample are limited by the semicircle on the PVC end plate on both sides to realize loading . The present invention greatly increases the range of stress that can be loaded in the experiment by changing the loading method; and the multi-channel experimental device can also be modified on the existing basis to be suitable for more samples to be tested and measured at the same time, compared with the original Only a single sample can be tested, which greatly improves the test efficiency.

Description

technical field [0001] The invention belongs to the field of marine engineering corrosion and protection, in particular to a multi-channel corrosion electrolytic cell loading and supporting device considering the influence of bending stress. Background technique [0002] At present, when using the existing corrosion electrolytic cell device considering the influence of stress to carry out the three-electrode electrochemical corrosion measurement test, the commonly used test device is the fatigue test machine as shown in the attached figure 1 Or self-made pulling and pressing mechanical device as attached figure 2 . [0003] Disadvantages of fatigue testing machine: it is mainly used for dynamic load loading, and the cost of static load experiment is too high; the assembly form is single, and there is only one way of vertical and horizontal plane clamping, resulting in a single loadable stress direction; only for a single experimental sample It is difficult to carry out mu...

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Problems solved by technology

[0003] Disadvantages of fatigue testing machine: it is mainly used for dynamic load loading, and the cost of static load experiment is too high; the assembly form is single, and there is only one way of vertical and horizontal plane clamping, resulting in a single loadable stress direction; only for a single experimental sample It is difficult to carry out multiple experiments at the same time when carrying out experiments; it is difficult to assemble the experimental sample in combination with the electrolytic cell to simulate the seawater environment under the loading condition; under the clamping of the fatigue testing machine, the contact part between the experimental sample and the electrolytic cell device is prone to leakage. lead to electrochemical measurement errors; more importantly, the electrical signal generated by the fatigue testing machine will have a significant impact on the fine electrochemical corrosion test measurement; under the conditions of the fatigue testing machine combined with the experimental sample and the electrolytic cell , in order to realize real-time monitoring of the pH value, oxygen content, temperature, etc. in the electrolytic cell solution, it is necessary to develop a corresponding electrolytic cell device, which is costly and repetitive

[0004] Disadvantages of self-made metal mechanical loading device: the form of stress that can be applied is single, only in the axial direction; if high stress is applied, it needs the assistance of an external hydraulic device, and it is difficult to load manually; and it is difficult to apply compressive stress, which is usually only suitable for loading of tensile stress; More importantly, in order to ensure the loading of the sample, the mechanical loading device usually uses metal to ensure its own strength, which causes the electrical signal measured by the electrochemical corrosion test to be strongly interfered by the external electrical signal; in order to avoid the mechanical loading device and Corrosion occurs in contact with the electrolytic cell solution, requiring special assembly of the mechanical loading device, experimental sample, and electrolytic cell device, which is difficult to assemble and easily causes errors in electrochemical signal measurement

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