Why do you want to shine? What are the common light-emitting solutions and what types?

Although the aluminum parts are cleaned by water after alkali etching, the surface of the parts is still alkaline due to the poor water washing property of the alkali, and the aluminum will quickly oxidize and discolor under alkaline conditions. The light-emitting treatment can neutralize the alkaline substance on the surface of the part, suppress the rate of re-generation of the oxide film, and remove the ash-like substance which is not absorbed by the alkaline reaction but is still adsorbed on the surface of the part and is relatively firm. Black film (these substances are mainly free silicon).

The process formula of commonly used light-emitting solution is sulfuric acid light-emitting liquid, nitric acid light-emitting liquid, nitric acid-hydrofluoric acid mixed light liquid, chromic acid light-emitting liquid, etc., which can be selected according to the material composition of the workpiece and the requirements of the light-emitting process.

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Label: solution alkali corrosion nitric acid alkaline substance chromic acid

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