M1.2 M1.4 M1.6 flat head black zinc plated half thread screw

Industry knowledge：

Screw surface color treatment process

The reason why the colors of screws can be diversified is that after the production of screws, the surface treatment such as electroplating is carried out again, and the metal layer of other colors is covered on the surface of screws, so that we can see the colorful colors.
And the surface treatment involves another problem, different materials, then the surface treatment is also different, then the color that can be produced will be limited.
For example, carbon steel material, it can be electroplated into a variety of colors, gold, silver, black and so on, and the effect of electroplating is very good. Is stainless steel screw OK? Stainless steel screws can also be electroplated into various colors, but stainless steel screw manufacturers do not recommend that most stainless steel screws should be treated with natural color, that is, after cleaning the oil stains. This is because stainless steel materials are different in nature. When the electroplated layer of other colors covers the surface of stainless steel screws, it will not be as perfect as carbon steel screws, The electroplating layer is easy to fall off, and the collision between screws is easy to occur during electroplating, resulting in screw surface defects.