Why are aluminum parts cleaned with nitric acid and hydrofluoric acid?

The aluminum parts processing industry has been to clean oil removal mainly by acid cleaning, using acid reaction to remove the surface of aluminum oil, but also to remove the raw edge of the product, so that the product surface oxidized to white. However, the high precision requirements of aluminum products should not use acid aluminum products cleaning agent. In addition to the oil to be completely removed at the same time can not have any impact on the surface of the product, do not change the color, size.

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