How to remove titanium film

The reserves of titanium in the earth's crust are second only to iron, aluminum, and copper, ranking fourth among metallic elements. Moreover, nickel alloys have a series of excellent properties and are therefore increasingly used.
Titanium alloys can be divided into three categories: high-temperature titanium alloys, structural titanium alloys and functional titanium alloys according to application background. You might think that the purer the titanium metal, the harder it will be. In fact, this is not the case. The hardness of titanium is not very high, just right. Some titanium that is not very pure is surprisingly hard, and some impurities can increase its hardness.
Titanium and titanium alloys have outstanding advantages such as high specific strength, corrosion resistance, non-magnetism, low damping, good high and low temperature performance, good compatibility with carbon composite materials, and good biocompatibility. But their wear resistance and hardness are poor. In order to solve this shortcoming, the vacuum titanium nitride film layer process solves this problem well. To this end, here is an introduction to the titanium nitride deplating method in order to promptly remove the defective film layer that appears in mass production. Titanium nitride has high hardness, wear resistance, corrosion resistance and good decorative properties. More than 50% of the titanium materials used in global titanium production and processing are used in the aviation field. Aircraft lightweighting is an eternal theme in the development of the aviation industry. In the next 20 years, the demand for new passenger aircraft will be around 10,000. In the future, the lightweighting of major models will significantly increase the use of titanium and titanium alloys. In other fields, titanium demand growth is mainly concentrated in seawater desalination equipment, LNG equipment, atomic power plants, chlor-alkali equipment, PTA equipment, large building roofs, ships, medical surgeries and other fields.
Stripping method
1. Pour 30% hydrogen peroxide, put the parts to be deplated neatly into the container until the plated parts are submerged, and then slowly add granular sodium hydroxide. Bubbles are generated in the solution until the film falls off, then rinsed with water and allowed to dry. It should be noted that sodium hydroxide must be added gradually during operation, otherwise a large number of bubbles will escape due to the violent reaction.
2. Immerse the parts in HNO3:HF=3:1 stripping solution. The film will be gradually removed. Rinse with water immediately after removal and then dry to prevent the stripping solution from corroding the substrate. For a small amount of deplated parts, you can also use cotton gauze dipped in the deplating solution to wipe repeatedly to remove the film layer, then clean and dry.