Preparation method of smoke-free aluminum alloy polishing solution

Abstract

The invention relates to the technical field of preparation of polishing agents, in particular to a preparation method of a smoke-free aluminum alloy polishing solution. The preparation method comprises the following steps: taking bauxite as a raw material to obtain alkaline suspension; treating the alkaline suspension to obtain base fluid of the polishing solution; adding the base fluid of the polishing solution into a mixed solution of aniline and absolute ethyl alcohol to obtain a reflux mixed solution; adding benzyl chloride into corrosive acid to obtain reddish brown liquid; finally, mixing the reddish brown liquid, dry powder, hydrogen peroxide and other raw materials to obtain the smoke-free aluminum alloy polishing solution. The dry powder is rich in sodium aluminate and sodium silicate; after corrosion, urotropine can be attached to the surface of an aluminum alloy and is complexed with aluminum ions so as to form a protecting film which is insoluble in acid; mannich base is quaternized with benzyl chloride to generate polar groups which select nitrogen atoms as the center; when the polar groups are in contact with the surface of the aluminum alloy, an adsorption layer isformed by the polar groups and the aluminum alloy under the action of physical absorption, so that activation energy of corrosion reaction is enlarged; the preparation method of the smoke-free aluminum alloy polishing solution has a broad application prospect.

Description

technical field [0001] The invention relates to the technical field of polishing agent preparation, in particular to a method for preparing a smokeless aluminum alloy polishing solution. Background technique [0002] Aluminum alloy is a good structural material with good mechanical and physical properties and chemical stability at high temperature. Due to its light specific gravity, high strength, easy processing, stable size, excellent process performance, good corrosion resistance, low cost and renewable utilization, aluminum alloy is known as the green engineering metal in the 21st century and can be used in many industries. place instead of steel alloys. [0003] With the wide application of aluminum alloy materials, the requirements for its surface brightness are becoming more and more stringent. The key factor affecting the surface brightness of aluminum alloy is the performance of polishing fluid. Polishing the surface of aluminum products not only makes the appear...

AI Technical Summary

Problems solved by technology

[0007] The technical problem mainly solved by the present invention is that the current traditional aluminum alloy polishing solution is composed of phosphoric acid, sulfuric acid and nitric acid. Because the polishing solution contains nitric acid, a large amount of yellow smoke will be released during the polishing process, which will seriously affect the environment and cause damage to the health of workers. , in addition, because the corrosion rate of the polishing liquid is too fast, it will cause corrosion on the aluminum alloy surface and form pitting defects, and a preparation method of a smokeless aluminum alloy polishing liquid is provided

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