A kind of magnesium-lithium alloy surface treatment device

Abstract

The invention discloses a magnesium-lithium alloy surface treatment device, which aims to make the magnesium-lithium alloy in the process of chemical conversion uniform conversion film, and no corrosion spots appear when tested by a salt spray test. The technical scheme adopted is: comprising: The treatment tank is used for placing the treatment liquid. The bottom of the treatment tank is provided with a number of liquid spray holes. The liquid spray holes are connected to the variable frequency pump through the liquid channel arranged at the bottom of the treatment tank. The variable frequency pump is connected to the treatment liquid source. The control end of the pump is connected to the controller, the side wall of the processing tank is provided with a position sensor, and the position sensor is connected to the controller; when the magnesium-lithium alloy workpiece is processed, the processing liquid is sprayed through the liquid spray hole to make the magnesium-lithium alloy work. The alloy workpiece is suspended in the treatment liquid, and the position sensor detects the position change information of the magnesium-lithium alloy workpiece and feeds it back to the controller. The controller adjusts the outlet pressure of the variable frequency pump according to the position change information, so that the magnesium-lithium alloy workpiece can be stably suspended in the treatment liquid. in liquid.

Description

technical field [0001] The invention belongs to the technical field of magnesium-lithium alloys, and in particular relates to a magnesium-lithium alloy surface treatment device. Background technique [0002] The surface treatment of magnesium-lithium alloy is a worldwide problem. Although the use of our company's chemical oxidation and conversion coating can solve the protection problem of magnesium-lithium alloy, it is found that the oxide layer at the contact between the supporting aid and the treated surface is uneven in practical applications. In order to solve this problem, our company invented a device to make the protective layer uniform. [0003] Compared with other structural metal materials, the chemical properties of magnesium-lithium alloy are relatively active, and its standard electrode potential is very negative (-2.8V). Put the magnesium-lithium alloy in the air, and a very thin oxide layer will be formed on the surface immediately. This film layer can be di...

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Problems solved by technology

Put the magnesium-lithium alloy in the air, and a very thin oxide layer will be formed on the surface immediately. This film layer can be divided into three layers. The outermost layer is a small plate-like structure with a thickness of 2 μm, and the middle is 20-40 μm. The dense layer, the third layer is a honeycomb structure, the natural oxide film layer of magnesium-lithium alloy is porous, and the oxide film layer cannot provide complete coverage for the surface, so it is not protective

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