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Erosion is the process of removing the oil and removing the oil, but also the process of removing the oxide film.Therefore, it is necessary to cooperate closely in every process before and after the etching, to clean the organic solvent with a single organic solvent or to clean it in weak alkaline solution.If the parts on this strong alkali etching processing directly, and will cut off by the uneven surface of oil, the etching solution can't sync up a chemical reaction in the surface of aluminum parts, so the surface will be destroyed, reaction, serious when still possible potholes inequity, will seriously affect the product appearance, at the same time also can bring tolerance matching quality problems, such as, light person repair or scrap.Before but alkali etching is not are required to pass through the process, still need according to the surface condition of the parts, the surface is in good condition, no serious pollution parts can be directly in strong alkaline etching.
After etching, it is necessary to deal with the light (also known as neutralization) in order to remove the ash from the etching and the alkaline materials that are difficult to wash away.To achieve clean surface, the surface is completely exposed to ensure that the solution of the next process is not contaminated and to lay the foundation for the normal oxidation film.
The steps that need to be taken during the process of etching are:
Remove the surface adhesion;
Organic solvent cleaning;
Chemical cleaning;
(4) alkali corrosion;
(5) the light.
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