How is the screw surface treated?

How is the screw surface treated?

Recently, many customers ask about screws, can the surface color of screws be made into gold or other colors? In fact, this involves a problem, which is the screw surface treatment. Next, LIHAO will talk to you about: what are the common surface treatments of screws?

In fact, the common surface treatments of screws are: Electroplating, Anodic oxidation, Passivation, Electrophoresis, Blacking (blue) and Dacromet, etc.

1. Electroplating is to be electroplated screw as Yin and soak into the solution containing metal cation to be electroplated, through the action of the metal attached to the Yin and the surface, commonly used electroplating metal nickel, chromium, tin, copper, gold and silver.

2. Anodic oxidation is the use of chemical or electrochemical treatment to create a metal surface containing the metal composition of skin coating. Most metal materials (such as stainless steel, zinc alloy, aluminum alloy, copper alloy, titanium alloy) can be in the appropriate electrolyte for Anodic oxidation treatment.

3. Blackening, generally using alkaline chemical oxidation method, because of the characteristics of the appearance of the oxide film, can only be used in the general situation or oily medium, or considering the impact of the appearance, will use blackening screw treatment.

4. Passivation is to dissolve the iron contaminants hidden on the screw, so that the screw surface is opened into a layer of passivation protective film, can protect the screw is not easy to be corroded. In general, the passivation surface treatment method is applied to electronic products.

5. Electrophoresis is to evenly cover paint, rubber and other particles on the surface of screw fasteners. After surface treatment by electrophoresis, the coating on the screw surface should be uniform and smooth.

6. Dacromet surface treatment can be plated in three colors, black, silver gray, silver white. The advantage of Dacromet surface treatment is that rust prevention can be good, suitable for the material of carbon steel and stainless steel.

In fact, there are various types of surface treatment, but the screw to choose which surface treatment or according to the needs of customers, to see the specific use of the environment or other requirements to decide.

Degrees of gold

Environmental friendly green zinc

Environmental protection colorful

Environmentally friendly purple zinc

Aluminum oxide screw