Alkali etching process changed for aluminum parts to improve processing effect

With the continuous development of the aluminum casting industry, the casting industry has also begun to gain a certain position. It is precisely because of the large demand that the production of these manufacturers has greatly increased to meet the different needs of customers. So, in the aluminum casting industry, by what methods should the aluminum parts be treated to achieve the desired effect?

For aluminum parts, the surface of the manufactured aluminum part will be rough due to factors such as process or materials. In order to meet the application requirements, for example, the product is subjected to alkaline etching treatment to improve the surface quality of aluminum parts. But this operation is not so easy, and many aspects need attention.

Due to the presence of various compounds between metals and other inclusions; uneven chemical composition segregation caused by loose tissue; and the influence of factors such as the absence of a dense oxide film when cooling after casting, the surface of aluminum parts appears very Roughness greatly reduces the quality of the entire aluminum part.

However, we also found that alkaline etching can play a key role in improving the surface roughness of aluminum parts, but the control of alkaline etching time is a difficult and critical point. If the alkali etching time is short, the aluminum parts may not be completely removed; however, if the time is too long, the product will be over-corroded, which will cause changes in tolerance dimensions.