Cathodic electrophoresis immerses metal in the electrophoresis bath. Upon power application, electrochemical reactions deposit an insoluble coating on the surface. It involves at least electrophoresis, electrodeposition, electroosmosis, and electrolysis. Pre-treatment such as phosphating, silane, or zirconium is required to ensure quality.

Tenglong Automobile has a fully automated cathodic electrophoresis production line. The car body is hung on an automatic hoist, and the equipment runs through pre-degreasing, degreasing, silane, cathodic electrophoresis, drying, and strong cooling processes. Automation minimizes human intervention and ensures consistent quality.