Injection type erosion corrosion testing device

Abstract

The invention discloses an injection type erosion corrosion testing device and belongs to the field of metal material corrosion prevention. Polytetrafluoroethylene plastic serves as a pipeline loop material. The device comprises a constant-temperature liquid storage box, an erosion chamber, a stirring chamber, a circulating pump, a pipeline loop, a nozzle, a semi-cylindrical sample table and a clamp, wherein the circulating pump is connected in series with a frequency converter to change the operating frequency of a pump body so as to realize zero-order speed change; an electromagnetic flow meter is arranged on the pipeline loop at the rear section of the circulating pump and is used for monitoring flow in real time; a gear is arranged inside the stirring chamber; an external speed-regulating motor is installed for driving the gear to stir a fluid so as to ensure that solid particles in the fluid are uniformly suspended; a clamping device comprises the semi-cylindrical sample table and the clamp; an erosion angle of the fluid is changed by rotating the sample table. A reference electrode and an auxiliary electrode are arranged in the erosion chamber, the reference electrode, the auxiliary electrode and a sample clamped by the clamp form a three-electrode system which is externally connected with an electrochemical working station and a computer, and real-time dynamic electrochemical measurement at different fluid speeds, angles and temperatures can be realized by accurate control.

Description

technical field [0001] The invention relates to a fluid erosion corrosion test device for metal materials. The test environment factors are controllable and can accurately measure the electrochemical information of materials at different temperatures, flow rates and erosion angles. Background technique [0002] Erosion corrosion is the corrosion of materials under the interaction of fluid erosion and corrosion. The erosion and corrosion of the fluid during the use of the pipeline will cause the pipe wall to be partially thinned and perforated to fail. This phenomenon is widely found in the bending part of the pipeline in the fields of petroleum, chemical industry, energy and electric power. According to reports, 95% of industrial explosions, fires, and gas leaks occur at pipe bends or elbows and leaking pumps or control valves. Therefore, the research on erosion corrosion of pipeline bends has been widely concerned by scholars at home and abroad. At present, the devices us...

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Problems solved by technology

[0003] In order to overcome the significant temperature rise of the test solution at high flow rates in the existing jet erosion corrosion test device, the large amount of wear of the circuit, and the metal ions in the circuit mixed with the device and the clamping part of the device and the sample are likely to form galvanic corrosion, which leads to the failure of the telephone test. problem of influence

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