Electrophoretic black for screw surface treatment is to deposit colloidal particles of organic resin on parts by electrochemical method to form organic coating layers of various colors. Electrophoretic black is widely used in the industry.
Take the black process as an example: degreasing-cleaning - Phosphating - Electrophoretic paint - drying. It can be divided into anodic electrophoresis (resin becomes negative ions after ionization) and cathodic electrophoresis (resin becomes positive ions after electrophoresis).
Compared with paint technology, it has better construction performance and less pollution and harm to the environment. Its resistance to neutral salt spray is 300 hours. or above, the cost and corrosion resistance are similar to the Dacromet process.
