Vapour-liquid two-phase flow accelerated corrosion test device

Abstract

The invention relates to a vapour-liquid two-phase flow accelerated corrosion test device which is characterized by comprising a testing autoclave body, an oil bath heating jacket, an autoclave body cover, a magnetic rotating device, a high-temperature reference electrode, a graphite auxiliary electrode, a working electrode, a variable frequency motor, a potentiostat, a corrosion measurement computer, an equipment control cabinet, an inner lining, a gas-phase generator, an electric heater and a thermocouple sensor. In the invention, an electrochemical measurement method is adopted to carry out experimental study on the relevant properties of vapour-liquid two-phase flow accelerated corrosion, including the measurement of relevant coefficients of the transient corrosion property, the corrosion impedance and the corrosion reaction, the relation between mass transfer and corrosion reaction, the relation between the vapour-liquid two-phase flow pattern and the corrosion rate and production and breakage mechanism of a corrosion product membrane and the critical characteristic of the breakage. The high-speed rotation is realized and meanwhile, and the good sealing property is ensured byadopting the magnetic rotating device.

Description

technical field [0001] The invention relates to a test device, in particular to a device for petrochemical and nuclear power vapor-liquid two-phase flow accelerated corrosion tests. Background technique [0002] At present, petrochemical, nuclear power and other industries have a particularly important strategic position in the development of my country's national economy. In these industrial fields, high-tech mechanical devices are developing in the direction of high temperature, high pressure, and large-scale, which brings more and more complex working conditions to industrial transportation pipelines, and puts forward challenges to the corrosion resistance and reliability of pipelines. Extremely demanding. In order to ensure the safe and reliable operation of mechanical equipment and avoid major accidents, the related life prediction and pipeline anti-corrosion technology research has become a major issue affecting the national development strategy and the country's medi...

AI Technical Summary

Problems solved by technology

The former can get the effect of mass transfer on corrosion, but due to the defect of insufficient power provided by the rotating disk, the interaction between hydrodynamics and corrosion cannot be obtained, and the test machine can only obtain the flow accelerated corrosion test data of single-phase fluid

Although the latter can obtain experimental data of accelerated corrosion by vapor-liquid two-phase flow, due to the limitation of corrosion rate measurement means, the obtained data is not accurate enough, and the test bench is not universal.

[0007] (3) Some single-phase erosion corrosion experimental devices cannot clarify the mechanism of vapor-liquid two-phase flow accelerated corrosion because they do not meet the conditions of actual working conditions

Its experimental data has no guiding significance for accelerated corrosion of vapor-liquid two-phase flow

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