ELECTROLYTIC ZINC COATING

How it works and why it protects metal

This is a surface treatment that coats the material with a thin (10-15 microns as a standard) and uniform layer of zinc, applied through an electrochemical process at room temperature. Its goal is twofold: to protect the metal from corrosion and to ensure a smooth, controlled finish, suitable even for highly technical components.

How does the process work?

Preparation Phase

The component is degreased, pickled and activated to remove oxides, oils and impurities from previous processes or conditions. This phase is crucial: without a clean surface, the zinc will not adhere properly and risks compromising the final result.

Immersion

The particular (cathode) is immersed in a solution containing zinc salts (anode).

Electrochemical Deposition

When direct current is applied, the zinc ions present in the solution migrate to the part and are deposited in metallic form.

The result is a uniform, micron-controllable coating, much more precise than other methods.

Final Treatment (Passivations and Sealants)

After deposition, the coating can be further protected with passivations (white, yellow, black, trivalent, etc.) and sealants that increase corrosion resistance and/or improve its aesthetic appearance.

Nanotechnological Enhancement and Sealing

If the customer's specifications require salt spray resistance, the part is treated with a special nanotechnological formulation that increases its corrosion resistance and durability.

I principali vantaggi della zincatura elettrolitica

Anti-corrosion protection

Thanks to the barrier action and cathodic protection of zinc, corrosion protection is achieved.

Compatibility with passivations

Zinc plating is compatible with many passivations, which increase its durability and functionality.

Uniform Thickness

Ideal for screws, bolts, small parts and large or small mechanical components with close tolerances.

Cold process

The cold galvanizing process is free from thermal stress on the piece

Aesthetic finish

Glossy or satin depending on the expected aesthetic requirements

Excellent adhesion

Adhesion to the part is excellent if the preparation of the part is carried out correctly

What materials can it be applied to?

Zinc electrolytic galvanizing is particularly suitable for:

Carbon steel (the most common material).
Alloy steels with complex geometries or small parts.
Cast iron, after adequate preparation.
Iron

However, it is not suitable for aluminium (anodisation is better), copper or stainless steel, which require specific treatments.

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