Experiment-type metallic solution cavitation corrosion apparatus

Abstract

The invention relates to the field of nuclear industry, and especially relates to an experiment-type metallic solution cavitation corrosion apparatus. The experiment-type metallic solution cavitation corrosion apparatus is mainly formed by an ultrasonic cell pulverizer and a vacuum resistance furnace. The ultrasonic cell pulverizer is mainly formed by an ultrasonic amplitude transformer, an energy transducer, a control box and a compression refrigerating machine, ultrasonic power is 3000W, cavitation can be generated in a metallic solution, ultrasonic frequency is 20KHz, amplitude is 50+ / -5% [mu]m, the highest work temperature is 550 DEG C, and operation of the ultrasonic cell pulverizer can be continuously carried out at the temperature of 550 DEG C for 10-15 hours. The vacuum resistance furnace is mainly formed by a control cabinet, a furnace system, a vacuum system and a water cooling system, operation temperature is 400-600 DEG C, a crucible is made of a 304 stainless steel alloy, and a material of the vacuum resistance furnace employs common carbon steel. The apparatus can simulate the condition that cavitation corrosion of nuclear reaction equipment is generated by liquid metal with high speed flow in the field of the nuclear industry, and difficulty of research and experiment in the field of the nuclear industry can be solved, and the apparatus provides powerful guarantee for scientific research.

Description

technical field [0001] The invention relates to the field of nuclear industry, in particular to an experimental metal solution cavitation corrosion device, which is composed of an ultrasonic cell wave pulverizer and a vacuum resistance furnace, and is used for simulating the impact of high-speed liquid metal in the nuclear industry on nuclear reaction equipment in the teaching and experimental environment. The cavitation corrosion provides a good platform for the research in the field of nuclear engineering. Background technique [0002] In the field of nuclear engineering, due to the huge amount of heat released by the nuclear reactor, the use of traditional liquid water to cool the device cannot meet the requirements at all. Because the liquid Pb-Bi alloy (LEB) has a low melting point, a high boiling point, good thermal conductivity, low reactivity and high The neutron yield and other advantages make it a safe and efficient coolant for nuclear reactors; however, the long...

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Problems solved by technology

[0002] In the field of nuclear engineering, due to the huge amount of heat released by the nuclear reactor, the use of traditional liquid water to cool the device cannot meet the requirements at all. Because the liquid Pb-Bi alloy (LEB) has a low melting point, a high boiling point, good thermal conductivity, low reactivity and high The neutron yield and other advantages make it a safe and efficient coolant for nuclear reactors; however, the long-term operation of liquid metals will cause a certain degree of corrosion to nuclear equipment, and the corrosion mechanism is still unclear, especially for nuclear power plants. When the impeller of the pump and the flow-passing parts move relative to the liquid metal at a high speed, a vortex in a local area will be generated, forming a sudden pressure change zone, which will cause the precipitation of dissolved gas and the gasification of the medium in the low-pressure zone, and then there will be bubbles on the surface of the blade and pipe fittings. The formation and collapse of these bubbles will cause cavitation corrosion on the surface of the impeller, but the specific corrosion mechanism has not yet been studied. Therefore, it is of great significance to study the corrosion mechanism of cavitation corrosion caused by high-speed liquid metal on materials. To provide a theoretical basis for the corrosion resistance and service life of flow components, this experimental metal solution cavitation corrosion device uses high-power ultrasonic waves to act on the metal solution to generate cavitation in the metal solution to realize the simulation of high-speed flow liquid metal nuclear reaction equipment cavitation corrosion

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