Alkali Corrosion Method For Aluminum Die Castings

Sometimes we find that the surface of aluminum die casting looks rough. There are many factors cause this phenomenon. For example, there are a variety of compounds and other inclusions. Sometimes chemical composition segregation is not uniform. And it not forms dense oxide film after casting cooling. At this time, we will find the alkali corrosion method can play a key role to improve this problem.

However controlling alkaline etching time is difficult, at the same time, it is also a key factor. If the alkaline etching time is short, aluminum die casting may can not be moved throughly. On the contrary, too long time will cause production excessive corrosion. So that the dimension tolerances will be changed. The best method is changing the alkaline etching procedure. In other words, treat the die casting with alkali corrosion method, this will not only improve surface quality, but also prevent many problems which caused by alkali corrosion.

After alkali corrosion treatment, you can also use hydrochloric acid to fast light. This effect will be better. Die casting is one of the most advanced metal forming method. It is an effective way to achieve the goal of little chips and no scraps.