Corrosive sample fixture structure

Abstract

The invention relates to the field of pipeline interference testing, in particular to testing and testing under high-voltage AC and DC interference, and is mainly used for a new type of corrosion sample fixture structure for electrochemical testing and weight loss testing of samples under high-current and high-voltage conditions . Its structure includes: an insulating seat for containing samples, an insulating cover for fixing the sample and a sealing ring for sealing the insulating seat and the insulating cover. The exposure size and area of ​​the sample in the new corrosion sample fixture are controllable; the sample can be taken out at any time to measure the quality change and surface change; the sample can be connected to a wire, and currents of different directions and sizes can be applied; the fixture body can be reused , It has the advantages of high temperature resistance, acid and alkali corrosion resistance. The fixture is especially suitable for polarization characteristics and corrosion tests of metallic materials in various environments.

Description

technical field [0001] The invention relates to the field of pipeline interference testing, in particular to testing and testing under high voltage AC and DC interference, and is mainly used for a corrosion sample fixture structure for electrochemical testing and weight loss testing of samples under high current and high voltage. Background technique [0002] With the rapid development of China's economy and society, the rigid demand for energy has increased. Combining the characteristics of the reverse distribution of primary energy and load demand in my country, it is objectively required to optimize the allocation of energy in a wide range. In order to realize the economical and reasonable allocation of energy, my country has made every effort to develop high-voltage AC and DC power grids and long-distance oil and gas pipeline networks in recent years. [0003] By the end of 2014, the total mileage of oil and gas pipelines in all regions of China except Taiwan Province wa...

AI Technical Summary

Problems solved by technology

Among them, the bare chip sample is easy to make and is mainly used in on-site testing, but the sealing layer is prone to fall off and the connection is broken at the connection between the test piece and the wire; the material of the epoxy resin sealed sample is stable, which is convenient for simulating the corrosion test, but the test After the completion, the sample cannot be taken out, which makes it impossible to test the corrosion weight loss, and the problem of epoxy resin ablation is prone to occur under higher voltage and current; the paraffin-sealed sample can be taken out after the experiment to facilitate the test of weight loss, but in soil, etc. In an environment with poor thermal conductivity, it is easy to accumulate heat and melt the paraffin on the surface of the sample, which will lead to changes in the exposed area of ​​the test piece and damage the consistency of the test.

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