Why are some titanium screws colored in appearance?

Release time：2021-09-24 16:21:02 丨 Number of visits：

A customer recently asked us "Why are some titanium screws colored in appearance?"

　　Answer: In fact, this kind of color can be processed through the process, resulting in color change.

Colored titanium screws are only processed by the surface process to change the screws into different colors. For example, in black, black titanium screws are coated with a layer of black. First, they must be covered with black, which is often called boil Black means to boil the screw fasteners directly into the medicine to get a black oxide film on the surface of the screw. After finishing, the finished product looks very beautiful, but the anti-corrosion function is not strong;

Therefore, it is necessary to perform oxidation treatment on the outer surface. Oxidation blackening is also a common surface treatment method. This treatment is to put the screw fasteners in a strong oxidizing chemical solvent to form a more beautiful layer after a period of time. The denser black iron oxide film also has anti-corrosion function.

Another method is phosphating blackening. Put the screw fasteners in the phosphating solution, and they will accumulate on the surface of the screw to form a water-insoluble crystalline phosphate conversion coating, which is resistant to phosphating blackening. The corrosion function is much stronger than the previous two corrosion resistance functions.