Equipment information

Purpose of Plating

Why is it necessary to apply zinc plating?

Basic Process of Zinc Plating (Example)

Immersion Degreasing In the immersion degreasing step, a surface-active agent is used to remove unwanted substances, such as grease, adhered to the items to be plated.
Rinsing In the rinsing step, the items to be plated are washed with water in order to prevent the chemical solution used in the preceding step from being brought to the next step.
Pickling In the pickling step, oxide films, dirt, and other unwanted substances on the surfaces of the items to be plated are removed.
Electrolytic Degreasing In the electrolytic degreasing step, the items to be plated undergo electrolysis to improve the effect of degreasing.
Neutralization In the neutralization step, residual substances on the surfaces of the items to be plated are removed by an acid. This also prevents the alkaline degreasing solution from being brought to the plating step.
Plating The items to be plated are immersed in the plating solution to generate a thin metallic layer on the surfaces.
Activation In the activation step, the plated surfaces are activated in order to allow normal chemical conversion treatment.
Chemical Conversion Treatment In the chemical conversion treatment step, the plating is further coated with a thin layer of an oxidized compound or other substances.
(Finishing) In the finishing step, the plated items are processed as needed for the purpose of functional improvements, such as appearance improvements.
Drying In the drying step, the moisture on the surfaces of the plated items is removed.

Barrel Plating and Rack Plating

Barrel Plating

The products are put into a barrel that has holes through which water can pass. The barrel is immersed in the solution and rotated during the plating process.
It is possible to process a large number of products at a time, achieving higher productivity compared to rack plating.

Rack Plating

Products are hung one by one on racks to undergo the plating process.
Because the products cannot come into contact with each other, this plating process rarely causes scratches or deformation, and it is possible to process relatively large objects that would be difficult to barrel-plate.