A kind of aluminum product chemical polishing liquid and preparation method thereof

Abstract

The invention discloses chemical polishing solution for aluminum products and a preparation method thereof, which relate to chemical polishing solution. The invention provides chemical polishing solution for aluminum products, which has the advantages of producing little yellow smoke, avoiding polluting environment, containing no nitric acid and the like, achieves the same polishing effect as a nitric acid improved 'three-acid' polishing process which is equal to the conventional 'three-acid' process and can reduce release of nitric oxides to protect the environment from being polluted, and apreparation method thereof. The chemical polishing solution for aluminum products is prepared from the following raw materials: sulfuric acid, phosphoric acid, boric acid, passivator, antifog brightener, citric acid, tartaric acid and water. The preparation method comprises the following steps: adding the solid raw materials into water; after the solid raw material dissolve, adding phosphoric acid and sulfuric acid in turn; and after the solution is cool, transferring the solution to a volumetric flask to fix the volume. The using method of the chemical polishing solution for aluminum products comprises: heating the chemical polishing solution for aluminum products to 95 to 110 DEG C; immersing dry and clean aluminum products to be polished into the chemical polishing solution for aluminum products, treating for 30 to 100 seconds, and taking aluminum products out; and immersing the collected aluminum products to be polished in nitric acid for bright dipping for 25 to 120 seconds, washing and thus, accomplishing the polishing of aluminum products.

Description

technical field [0001] The invention relates to a chemical polishing liquid, in particular to a chemical polishing liquid for aluminum products and a preparation method thereof. Background technique [0002] Chemical polishing of aluminum products is a process in which aluminum and its alloys are chemically impregnated in a chemical polishing solution to make the appearance of the product bright, clean and smooth. Chemical polishing has the advantages of low energy consumption, simple operation, high production efficiency, and is not limited by product shape and size. It is an extremely important process in the surface finishing treatment of aluminum products. The traditional chemical polishing process generally adopts the "three-acid" process of phosphoric acid, sulfuric acid, and nitric acid, which has the advantages of good polishing quality and high brightness. However, due to the use of nitric acid, a large amount of yellow smoke (that is, nitrogen oxides) is generated ...

AI Technical Summary

Problems solved by technology

At present, some non-yellow smoke chemical polishing mostly adopts the method of "phosphoric acid + sulfuric acid + additives". In addition to technology, an important reason is that the polishing quality of no yellow smoke polishing is not good enough, that is, the polishing brightness (reflectivity) is not enough, and it cannot meet the brightness and production requirements of traditional three-acid polishing

Therefore, the application of the smoke-free chemical polishing process has been greatly restricted (Chen Zuqiu. Research status of domestic aluminum products without yellow smoke chemical polishing process [J]. Materials Protection, 1999, 32(4): 23-24)

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