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Vapour-liquid two-phase flow accelerated corrosion test device

A flow-accelerated corrosion, vapor-liquid technology, applied in measuring devices, weather resistance/light resistance/corrosion resistance, instruments, etc., can solve problems such as the inability to understand the accelerated corrosion mechanism of vapor-liquid two-phase flow, and the fact that accelerated corrosion does not have guiding significance , to achieve the effect of excellent sealing characteristics and wide application range

Inactive Publication Date: 2010-12-01
NANJING UNIV OF TECH
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AI Technical Summary

Problems solved by technology

[0007] (3) Some single-phase erosion corrosion experimental devices cannot clarify the accelerated corrosion mechanism of vapor-liquid two-phase flow 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

Method used

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with accompanying drawing:

[0030] Such as figure 1, a device for vapor-liquid two-phase flow accelerated corrosion test, comprising a test kettle body 10, an oil bath heating jacket 3, a kettle body cover 13, a magnetic rotating device, a high-temperature reference electrode 18, a graphite auxiliary electrode 21, and a working electrode 6 , frequency conversion motor 20, potentiostat 9, corrosion measurement computer 11, equipment control box 22, inner liner 2, gas phase generator 7, electric heater 1 and thermocouple sensor 24, described test kettle body 10 and kettle body cover 13 is connected by bolt flange structure; the test kettle body 10 and the oil bath heating jacket 3 are welded by argon arc welding; the magnetic rotating device includes the outer magnetic drum 15 and the inner magnetic drum 16, and the electric heater in the oil bath heating jacket 1. The thermocouple temperature sensor 2...

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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 by adopting 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00G01N17/02
Inventor 陆晓峰朱晓磊凌祥
Owner NANJING UNIV OF TECH
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