Titanium tube manufacturers can heat titanium in vacuum or hydrogen gas to eliminate the influence of external oxide film on the hydrogen absorption process. When heated to 700-850 ℃, the oxides on the surface of the titanium tube begin to diffuse towards the metal, and the hydrogen absorption rate of the treated titanium tube is greatly increased. However, this method eliminates oxygen in the oxide film during the heat treatment process. Entering the metal not only slows down the diffusion rate of hydrogen into the metal, but also allows oxygen to enter the final product, thereby reducing product quality; At the same time, the particles in the titanium tube during the heat treatment process can also cause a certain degree of sintering, reducing its hydrogen absorption rate
Oil removal: After cooling the steel billet, use a metal degreaser to remove the oil stains on the surface of the pipeline surface. When taking oil, pay attention to the orientation of the inner hole where oil is easily stored to ensure complete cleaning. Acid cleaning: The purpose of acid cleaning is to remove the oxide film generated after annealing from the titanium tube surface. At room temperature, a certain amount of clean water was placed in an acid pickling tank, and the normal ratio of HNO 3 to HF, HNO 3, and HF water was HF+residual H2O. Corresponding adjustments were made according to the actual situation.
The pickling time is 10-15 minutes, which can also be determined based on the pickling condition. During the pickling process, it is important to frequently turn around and check to ensure that the pickling is uniform and complete, avoiding too fast or excessive pickling. After pickling, the titanium tube is visually inspected to remove the oxide skin on the inside and outside of the titanium tube, remove the silver white color, and wash it.
After acid cleaning and inspection, the titanium tube should be cleaned in a timely manner to remove residual acid and acid cleaning materials from the inner and outer surfaces to ensure that the details of the titanium tube are bright.
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