Aluminum and aluminum alloy efficient environmentally-friendly polishing solution and preparation method thereof

Abstract

The invention discloses an aluminum and aluminum alloy efficient environmentally-friendly polishing solution and a preparation method thereof. The polishing solution comprises the following componentsin parts by weight: 0 to 20 parts of sodium cocoyl isethionate, 0 to 15 parts of 1-phenyl-5-tetrazole-thione, 0 to 10 parts of 3-sulfydryl-1-sodium propanesulfonate, 0 to 3 parts of copper sulfate, 0.2 to 1.5 parts of sodium tungstate dehydrate, 0.5 to 4 parts of a corrosion inhibitor, 0.2 to 5 parts of a surfactant, 20 to 50 parts of sulfuric acid and 20 to 35 parts of deionized water, wherein the sum of dosage of the components is 100 parts. The prepared efficient environmentally-friendly polishing solution is mainly applied to aluminum and aluminum alloy chemical polishing, a preparation technology of the polishing solution is simple, polishing speed is high, and production cost is low; the polishing solution is efficient and environmentally-friendly, and nitric acid and chromium-containing substances harmful to human bodies and the environment are not utilized; the surface of a polished aluminum profile is high in brightness, good in smoothness and free of corrosion spots; and additives in the polishing solution cooperate with each other, functionality of the solution is effectively improved, chemical performance of the solution is stable, and the polishing solution is suitable for mass production.

Description

technical field [0001] The invention relates to the technical field of chemical surface treatment of metal materials, in particular to a high-efficiency and environment-friendly polishing liquid for aluminum and aluminum alloys and a preparation method thereof. Background technique [0002] Chemical polishing is the use of chemical methods, under certain temperature and time conditions, aluminum products are placed in a polishing solution for chemical reactions to achieve a bright surface. Chemical polishing has the advantages of simple equipment, power saving, high efficiency and low cost, and is not limited by the shape and size of parts, so it is widely used. The current domestic traditional aluminum and aluminum alloy tri-acid (phosphoric acid + sulfuric acid + nitric acid) polishing process, because the polishing liquid contains a large amount of nitric acid, will produce a large amount of yellow smoke (ie nitrogen oxides) during the polishing process, seriously polluti...

AI Technical Summary

Problems solved by technology

At present, the application of chemical polishing without yellow smoke is still very limited. In addition to the lack of awareness of environmental protection of production enterprises and their reluctance to adopt new technology and technology, an important reason is that the quality of non-yellow smoke polishing is not good enough. After polishing, the surface of the alloy is gray or even black, with pitting

Can not meet the brightness and production requirements of traditional tri-acid polishing

Therefore, the application of the no-yellow-smoke chemical polishing process is greatly limited.

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