Common Plating Types For Push-in Terminals: Zinc Plating

The substrate for push in terminal block wire connector is typically made of steel or iron, which undergoes zinc electroplating after surface cleaning. After electrolytic zinc plating, a thin zinc film forms on the metal surface. This zinc film can, to a certain extent, prevent direct reaction between the metal substrate and the external environment. The thickness, adhesion, and uniformity of the zinc film are all key process parameters. The zinc plating layer bonds firmly to the material of push connector block, effectively delaying oxidation and corrosion.

Strict surface treatment monitoring is implemented during the production of push fit connector block. This includes degreasing, deoxidation, and activation before zinc plating; control of current density and temperature during the zinc plating process; and subsequent passivation treatment.