Dew point corrosion evaluation device with controllable condensation temperature

Abstract

The invention provides a condensation temperature controllable dew point corrosion evaluation device, which comprises a heating device (1), a container (2), a hollow corrosion element (3), a sealing cover (4), a condensation pipe (8), an anti-suck-back bottle (10), a tail gas absorption bottle (11), a constant temperature circulation device and a direct current resistance measuring instrument, and is characterized in that the container (2) is heated by the heating device (1), and the sealing cover (4) seals the container (2); the hollow corrosion element (3) and the condensation pipe (8) are arranged on the sealing cover (4), the condensation pipe (8) is communicated with the suck-back prevention bottle (10) through the guide pipe (9), and the suck-back prevention bottle (10) is communicated with the tail gas absorption bottle (11). By establishing the dew point corrosion evaluation device, the dew point corrosion resistance of the material can be evaluated in a laboratory; the surface temperature of the sample can be accurately controlled, and the dew point corrosion resistance of the material at a specific temperature can be evaluated; and the dew point corrosion resistance of the material can be evaluated in real time.

Description

technical field [0001] The invention relates to the technical field of chemical material screening and corrosion evaluation, in particular to a dew point corrosion evaluation device with controllable condensation temperature. Background technique [0002] Most of the equipment in the oil refining and chemical industry is corroded. In order to deal with equipment corrosion, in addition to process improvement and anti-corrosion, materials must also be screened to select materials suitable for specific working conditions. [0003] Chloride ion corrosion and H 2 S corrosion, in order to ensure the safe and stable operation of the equipment, it is necessary to test the selected materials, such as using the coupon method. However, the test period of the coupon method is too long and the efficiency is low. Therefore, a dew point corrosion evaluation device with controllable condensation temperature is developed to evaluate the ability of materials to resist dew point corrosion a...

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Problems solved by technology

[0005] However, this technical solution cannot accurately control the condensation temperature on the surface of the corrosion element; only one sample can be tested at a time, which is inefficient; the structure of the composite electrode and the test sample is complex; and it is impossible to compare the corrosion resistance of different materials or different surface treatment materials at the same time ability

[0006] The existing simulated corrosion experiment evaluation device realizes the condensation of acid gas by cooling the container cavity. Due to the large cavity, the temperature inside the cavity is not uniform, and there is a temperature distribution, it is difficult to study the dew point corrosion of the corrosion components at a specific temperature. Therefore, it is also difficult to study the relationship between dew point corrosion and temperature

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