Phosphating treatment is a surface treatment method to form a layer of phosphide on the metal surface through chemical reaction, which can improve the hardness, corrosion resistance and lubricity of the metal surface.
Author: Anna
I. Definition of phosphating treatment and blackening treatment
Phosphating treatment is a surface treatment method to form a layer of phosphide on the metal surface through chemical reaction, which can improve the hardness, corrosion resistance and lubricity of the metal surface. While the blackening treatment is through the oxidation of the metal surface, so that the surface shows a black effect, play the role of beautification and corrosion protection.
II. The difference between phosphating treatment and blackening treatment
1. Different roles
The main role of phosphating treatment is to form a layer of phosphide on the metal surface to improve the hardness of the metal surface, corrosion resistance and lubricity, in order to achieve corrosion, wear and tear effect. While the blackening treatment is to beautify and anti-corrosion, through oxidation to make the metal surface shows the effect of black.
2. Different effects
After phosphating treatment, the metal surface will appear gray-black, and the surface will form a layer of phosphide, with good hardness and corrosion resistance. The blackening treatment of the metal surface shows black, has a good aesthetic effect and anti-corrosion effect, but the hardness and corrosion resistance is relatively weak.
3. Different application scenes
Phosphating treatment is applicable to the requirements of hardness and corrosion resistance of the surface treatment of the workpiece, such as machinery accessories, automobile parts and so on. And blackening treatment is suitable for the requirements of beautiful and corrosion-resistant workpiece surface treatment, such as home furnishings, kitchen utensils and so on.
4. Different treatment methods
Phosphate treatment is mainly through the chemical reaction in the formation of phosphate on the metal surface, requires certain equipment and operating techniques, processing time is longer. While the blackening treatment is through oxidization, can be carried out in the family conditions, the processing time is shorter.