TC4 Titanium Hex Bolts Passivation Surface For Automotive Industry

Hexagonal TC4 titanium bolts passivation surface for automotive industry.
 
Description
Titanium hexagonal bolts are one of the ultra-high-strength bolts produced by special materials.
Titanium hexagonal bolts are produced and processed with high-strength heat-resistant and corrosion-resistant titanium alloy materials. 
 

Passivation advantages
1) Compared with the traditional physical sealing method, the passivation process has the characteristics of absolutely no increase in the thickness of the workpiece and no change in color, which improves the precision and added value of the product and makes the operation more convenient;
2) Since the passivation process is carried out in a non-reactive state, the passivation agent can be added and used repeatedly, so the life is longer and the cost is more economical.
3) Passivation promotes the formation of the oxygen molecular structure passivation film on the metal surface, the film layer is dense, the performance is stable, and it has a self-repairing effect in the air, so compared with the traditional method of applying anti-rust oil, the passivation formed The passivation film is more stable and corrosion resistant.

Most of the charge effects in the oxide layer are directly or indirectly related to the thermal oxidation process. In the temperature range of 800-1250℃, the thermal oxidation process with dry oxygen, wet oxygen or water vapor has three continuous stages.

First, the oxygen in the ambient atmosphere enters the formed oxide layer, and then the oxygen passes through the dioxide. Silicon diffuses to the inside, and when it reaches the Si02-Si interface, it reacts with silicon to form new silicon dioxide. In this way, the oxygen entry-diffusion-reaction process continues to occur, so that the silicon near the interface is continuously converted into silicon dioxide, and the oxide layer grows into the silicon wafer at a certain rate.

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