Titanium reserves in the earth’s crust are second only to iron, aluminum, and copper, ranking fourth among metal elements. Moreover, Qin alloy has a series of excellent properties, so it is getting more and more widely used. Titanium alloys can be divided into three types: high-temperature titanium alloys, structural titanium alloys and functional titanium alloys according to their application background. Everyone may think that the purer the titanium metal, the greater its hardness. In fact, the hardness of titanium is not large, just right. Some titanium that is not very pure is surprisingly high in hardness, and some impurities can increase its hardness.
Titanium and titanium alloys have outstanding advantages such as high specific strength, corrosion resistance, non-magnetic, low damping, good high and low temperature performance, good compatibility with carbon composite materials, and good biocompatibility, but their wear resistance and hardness Very poor, in order to solve the shortcomings in this aspect, the vacuum titanium nitride film process saves this problem very well.
To this end, the titanium nitride stripping method will be introduced, and the defective film layer in mass production should be promptly removed. Titanium nitride has high hardness, wear resistance, corrosion resistance and good decorative properties. More than 50% of titanium materials are used in aviation in the production and processing of titanium worldwide. The lightweight of aircraft is the constant theme of the development of the aviation industry. The demand for new passenger aircraft will be about 10,000 in the next 20 years. Lightweight will greatly increase the amount of titanium and titanium alloys. In other areas, the growth of demand for titanium is mainly concentrated in seawater desalination equipment, LNG equipment, nuclear power plants, chlor-alkali equipment, PTA equipment, roofs of large buildings, ships, medical surgery and other fields.
Pour 30% hydrogen peroxide, place the parts to be plated neatly in the container until the plated parts are submerged
Then slowly add granular sodium hydroxide. At this time, bubbles will be generated in the solution until the film layer is removed, and then rinsed with water and dried.
It should be noted that sodium hydroxide must be added gradually during the operation, otherwise a large number of bubbles will escape due to intense reaction. Method 2: Immerse the part in the HNO3: HF = 3: 1 stripping solution, the film layer will gradually be removed. After removing it, immediately wash with water and then dry to prevent the stripping solution from corroding the substrate. For a small number of stripped parts, it can also be wiped repeatedly with cotton yarn dipped in stripping solution to remove the film, and then cleaned and dried.
