A high temperature molten salt corrosion simulation device

Abstract

The present invention is a high-temperature molten salt corrosion simulation device, which includes a main container, a dynamic sample hanging system, a static sample hanging system, and an electrode system. On the container, an electric heating belt is laid on the outer wall of the crucible holder; the dynamic sample hanging system includes a rotating disk for test sample inlay, a motor rotating main rod, and a ceramic sample hanging rod. The motor rotating main rod extends into the crucible through the lid of the kettle , the lower end is connected to the rotating disc, and the upper end is connected to the rotating motor. Ceramic sample hanging rods are distributed on the peripheral edge of the rotating disc, and the test samples are mounted on the ceramic sample hanging rods; the static sample hanging system includes ceramic suspenders, and the ceramic suspenders pass through The lid of the kettle extends into the crucible; the electrode system is connected to the static sample hanging system, and is connected to the conventional electrochemical workstation. The invention can adjust the molten salt flow rate and corrosion temperature required by the test, and simultaneously simulate the corrosion conditions of static parts and dynamic parts under different atmosphere conditions.

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...

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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

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