In order to avoid too fast reaction speed to make Titanium castings dissolved amount of difficult to control, not conducive to maintaining the precision of castings, and if the hydrogen permeation increases, also will make the mechanical properties of castings variation.
In the practical application, the use of lower concentrations of HF and HNO3 mixed acid to remove surface contamination layer is Aerospace titanium castings suitable.
Titanium is a metal having a high degree of chemical activity. However, it emerged in many corrosive media particularly excellent corrosion resistance. The reason is titanium and has a good affinity for oxygen, react with oxygen to produce highly strong and dense layer of oxide film on the surface of the blunt.
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