Etching solution

Abstract

The invention provides an etching solution which is prepared from the following components by weight: 15%-25% of ferric trichloride, 30%-50% of hydrofluoric acid, 2%-5% of phosphoric acid, and the balance being water. Preferably, in the etching solution, on a weight basis, the content of ferric trichloride is 20%-25%, the content of hydrofluoric acid is 35%-50%, the content of phosphoric acid is 2%-3%, and the balance is water. The etching solution of the present invention can realize high etching efficiency and excellent processing effect, and can also form convex-concave fluctuating and smooth transitional surface microstructures.

Description

technical field [0001] The invention relates to the field of chemical etching technology, in particular to an etching solution used for etching processing of mold steel. Background technique [0002] Chemical etching is the process of quickly dissolving and removing undesired metals through chemical reactions using the corrosive action of chemical solutions. Metal etching must use efficient and stable etching solution to achieve efficient and stable etching function, so that the precision of etching products can meet higher processing requirements. The chemical etching process performs spray etching on the workpiece processed by the mask, and adjusts the spray pressure through the hydraulic system. In order to ensure the uniformity of processing, the processing sample is placed on the rotatable worktable, and the processing time is set, and the etching process of the mold steel can be carried out. The existing etching solution is suitable for rapid etching of microstructur...

AI Technical Summary

Problems solved by technology

However, the graphics processed by the existing etching solution often have a shape with large surface openings and small internal openings, and its cross-section is like a trapezoid.

The surface of the die steel is in the shape of square grids, which results in poor touch of the processed workpiece and affects the visual effect at the same time.

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