High temperature molten salt corrosion simulation device

Abstract

The invention discloses a high temperature molten salt corrosion simulation device. The device comprises a main container, a dynamic sample hanging system, a static sample hanging system, and an electrode system. The top of the main container is connected to a kettle cover; a crucible is arranged in the main container; the crucible is fixedly connected to the main container through a crucible support, an electric heating belt is paved on the external wall of the crucible support; the dynamic sample-hanging system comprises a rotation disc for embedding a sample, a motor rotation main rod, and a ceramic sample hanging rod, the motor rotation main rod penetrates the kettle cover and stretches into the crucible, the lower end of the motor rotation main rod is connected to the rotation disc, the upper end is connected to a rotation motor, the circumferential edge of the rotation disc is provided with the ceramic sample hanging rod, a sample is arranged on the ceramic sample hanging rod; the static sample hanging system comprises a ceramic hanger rod, the ceramic hanger rod stretches into the crucible through the kettle cover; and the electrodes system is connected to the static sampling hanging system and is also externally connected to a conventional electrochemical station. The provided device can provide a molten salt flowing speed and corrosion speed required by the experiments and simultaneously simulates the corrosion states of static parts and dynamic parts in different atmospheres.

Description

technical field [0001] The invention relates to the field of corrosion simulation equipment, in particular to a high-temperature molten salt corrosion simulation device. Background technique [0002] In view of the material selection of transmission pipes and key components in solar thermal power generation technology, it is necessary to consider the interaction between fluid molten salt and matrix materials at different flow rates and temperatures, and the interaction between electrochemical factors and hydrodynamic factors for molten salt corrosion. Therefore, a set of economical, practical and scientific high-temperature molten salt corrosion simulation device is designed to select materials for molten salt storage tanks, valves and transportation pipelines in solar thermal power stations. [0003] Traditional technical solutions have the following two methods: [0004] (1) Pipeline flow method, spray method: this kind of corrosion simulation device, electrochemical test...

AI Technical Summary

Problems solved by technology

[0004] (1) Pipeline flow method, spray method: this kind of corrosion simulation device, electrochemical test is relatively easy to realize the simulation test, but it cannot simulate the working conditions of the impeller of the molten salt pump and the stirring components in the storage tank;

[0005] (2) Rotating disk method: This kind of corrosion simulation device can better simulate the wear and corrosion behavior of molten salt pump impellers, stirring components in storage tanks, and transportation pipelines, but it is difficult to test electrochemical behavior and cannot accurately evaluate electrochemical behavior. Synergistic effect between factors and hydrodynamic factors on molten salt corrosion

[0006] However, the test sample is inlaid on the test disc, driven by the machine, the test disc rotates as the main movement, and it is impossible to study the force of the medium in the tangential direction under the flow direction characteristics of the axial flow type; at the same time, in the same test In addition, it is impossible to conduct research on the relative motion speed of the test sample and the molten salt; in addition, in the test inner kettle, it is impossible to conduct research on the synergy between the electrochemical factors of the test sample and the hydrodynamic factors; tone

Images