Titanium and titanium alloy plates are very common in industry, aviation and other fields, with high strength, good corrosion resistance and other advantages, become widely used high-quality materials. However, because titanium alloy after heat treatment, often form an oxide layer on the surface, not only has an impact on the appearance of titanium alloy, but also has an adverse effect on the surface binding force of titanium alloy and other coatings, therefore, it is very necessary to treat it, pickling is a common way of treatment.

Studies and experiments have shown that TC4 and TC4-H samples have important differences in the stop time of pickling for pickling solvents with the same acid composition and parameters, and it is difficult to meet the laboratory test requirements in terms of surface roughness after pickling. At the same time, TA2 and Ta2-H samples also appear the same problem. Before pickling in the feeding basis, the surface of the base material is treated first, requiring it to meet the requirements of the surface without oil, water, no obvious moisture, no alkaline matter, if not in line with, the first need for manual treatment. To improve the process parameters of shot blasting process, first of all, the stick speed of shot blasting process is improved to make the speed of pickling process greater than that of shot blasting process. Secondly, the shot blasting (electrical) flow and projectile velocity are adjusted. For the mixed acid pickling process parameters, the original mixed acid component is HNO+HF. In the adjustment, the mass concentration of HF and pickling time are controlled, the concentration is controlled below 30g/L, and the pickling time is controlled below 8 minutes according to practice.

When the process is improved, it is found to have a good use effect. Generally speaking, the use of a single mixed acid in the horizontal spray pickling production line has

There are two main stages of development, first of all, where the new technology is tested, and then the application stage where the production is optimized

It can improve the pass rate of one-time shot peening pickling, and effectively solve the black pitting and macular defects on the surface of titanium plate after pickling.