Rotary metal erosion corrosion electrochemical testing device
A test device and electrochemical technology, applied in the field of erosion and corrosion devices, can solve the problems of high erosion strength, unchangeable erosion angle, high construction and operation cost, and achieve the effects of ensuring stability, preventing damage and avoiding interference.
Pending Publication Date: 2020-12-29
SHANGHAI MARITIME UNIVERSITY
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Problems solved by technology
The spray test device is based on the structure of circulating pump and nozzle to produce high-speed flowing medium to impact the sample. It can control the speed of the fluid and change the angle of attack of the scouring, but it cannot simulate the actual working conditions well, and the scouring intensity is higher than the actual situation. Large, there is a certain gap with the actual erosion and corrosion conditions
The pipe-flow device is based on the static structure of the liquid flow pipeline, which can better simulate the erosion and corrosion behavior of the fluid along the axial direction of the inner wall of the pipe. long cycle
The rotating device is based on the tangential force generated by the rotating sample on the sample holder and the stationary liquid, causing the liquid-solid two-phase to wear and corrode. This type of device can provide relatively high flow rate conditions and can simultaneously perform flushing at different flow rates Corrosion test, but cannot perform stable electrochemical test on samples under liquid erosion state
[0003] The patent with the application number 201520366883.8 discloses an experimental device for metal erosion and corrosion testing with a rotating impeller. In addition, the device does not have a temperature control system, so erosion and corrosion experiments at different temperatures cannot be carried out; the patent application number 201520205739.6 discloses a corrosion and wear test device, which is equipped with electrodes that can be connected with electrochemical workstations connected, but the impact angle of the sample to be tested in this device cannot be changed, and the erosion performance of the material cannot be fully tested
The patent document with the application number 201911050368.8 discloses a rotary erosion corrosion test device. The device is equipped with a heating plate and an electrochemical test system for erosion corrosion experiments at high temperatures, but the sample is fixed on the rotating disk and cannot be adjusted. The impact angle, and the sample rotates with the rotating disk, the electrochemical test is unstable
[0004] The rotary erosion corrosion test device is the most commonly used equipment in the test of material erosion performance. The existing rotary erosion equipment cannot have the following characteristics at the same time: it cannot perform stable electrochemical analysis tests during the test; there is no temperature control system , cannot accurately control the temperature of the erosion slurry, and conduct erosion corrosion tests at different temperatures; the erosion angle of the sample cannot be changed, and the erosion performance of the test material cannot be fully tested; the flow rate of the fluid cannot be accurately measured , it is not possible to determine the erosion corrosion performance of the sample at different flow rates
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[0031] The technical solutions of the present invention will be further described below in conjunction with the drawings and embodiments.
[0032] Such as figure 1 and figure 2 As shown, the rotary metal erosion corrosion electrochemical test device of the present invention comprises: a slurry tank 17, a temperature control system for controlling the internal temperature of the slurry tank 17, a cover plate 15 for closing the slurry tank 17 , the stirring impeller 18 that is located inside the slurry tank 17, the rotating motor 27 that controls the rotation of the stirring impeller 18, the angle adjustment device 11 that is located on the cover plate 15, is connected with the angle adjustment device 11 and is located at the inside of the slurry tank 17 Working electrode column 22; the bottom of working electrode column 22 is provided with the sample holder 24 that is used for fixing sample 23, and angle adjusting device 11 is by adjusting the angle of working electrode colum...
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The invention discloses a rotary metal erosion corrosion electrochemical testing device. The testing device comprises a slurry tank, a temperature control system used for controlling the temperature in the slurry tank, a cover plate used for sealing the slurry tank, a stirring impeller arranged in the slurry tank, a rotating motor used for controlling the stirring impeller to rotate, an angle adjusting device arranged on the cover plate, and a working electrode column connected with the angle adjusting device and arranged in the slurry tank, wherein a sample clamp for fixing a sample is arranged at the bottom of the working electrode column, the angle adjusting device adjusts the impact angle of the sample by adjusting the angle of the working electrode column, and the working electrode column is further provided with a velocimeter for measuring the liquid flow velocity of the impact sample. According to the testing device, the test solution temperature, the sample impact angle and thefluid flow rate can be set according to actual needs, real-time monitoring and feedback of the test process are achieved, and reliable test conditions are provided for evaluation of erosion corrosionresistance of materials.
Description
technical field [0001] The invention relates to the field of erosion and corrosion devices, in particular to a rotary electrochemical test device for metal erosion and corrosion. Background technique [0002] Erosion corrosion is a phenomenon of metal damage caused by relative motion between the metal surface and the corrosive fluid, and is the result of the interaction between erosion and corrosion of the material. For the study of erosion corrosion, experimental research under simulated process conditions in the laboratory is an effective method to obtain the erosion corrosion performance parameters of materials. Currently, the devices used for erosion corrosion tests of metal materials are divided into pipe flow There are three types of type, jet type and rotary type, which are suitable for different working conditions and each has its advantages and disadvantages. The spray test device is based on the structure of circulating pump and nozzle to produce high-speed flowin...
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IPC IPC(8): G01N3/56G01N3/02G01N3/06G01N17/02
CPCG01N3/02G01N3/066G01N3/567G01N17/006G01N17/02G01N2203/0222G01N2203/0617
Inventor孙士斌金其乐常雪婷王东胜
OwnerSHANGHAI MARITIME UNIVERSITY