Magnesium-lithium alloy surface treatment device

Abstract

The invention discloses a magnesium-lithium alloy surface treatment device, and aims to enable a magnesium-lithium alloy to be uniform in a conversion film layer in the chemical conversion process and to generate no corrosion spots in inspection by a salt spray test. The magnesium-lithium alloy surface treatment device is characterized by comprising a treatment tank for placing treatment liquid, wherein multiple liquid spray holes are formed in the bottom of the treatment tank; the liquid spray holes are connected with a variable frequency pump through a liquid channel formed in the bottom of the treatment tank; the variable frequency pump is connected to a treatment liquid source; a control end of the variable frequency pump is connected to a controller; a position sensor is arranged on the side wall of the treatment tank, and is connected to the controller; when a magnesium-lithium alloy workpiece is treated, the treatment liquid is sprayed through the liquid spray holes to suspend the magnesium-lithium alloy workpiece in the treatment liquid; the position sensor detects position change information of the magnesium-lithium alloy workpiece to return to the controller; and the controller adjusts the liquid outlet pressure of the variable frequency pump according to the position change information so as to stably suspend the magnesium-lithium alloy workpiece in the treatment liquid.

Description

Technical field [0001] The invention belongs to the technical field of magnesium-lithium alloys, and specifically 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 in practical applications that the oxide layer at the contact between the support aid and the treatment surface is uneven. 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 more active, and its standard electrode potential is very negative (-2.8V). When the magnesium-lithium alloy is placed in the air, a very thin oxide layer will be formed on the surface immediately. This layer can be divided into three layer...

AI Technical Summary

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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