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Electrogalvanizing Surface Finishes
CNC Machined Parts Electrogalvanizing Services

In contrast to other coatings, zinc also provides active cathodic corrosion protection in addition to its shielding effect. In contrast to the more precious iron, zinc acts as a sacrificial anode. This effect also protects the base material in case of damage after coating (scratches or impact marks). Additional properties are achieved by downstream processes, such as passivation, sealing and other similar processes.

Type of Galvanized Surface Treatment for CNC Machined Parts


Zinc plating, commonly referred to as cold galvanizing, is an electroplating process that creates a uniform, durable, and strongly bonded metal or alloy coating on a part's surface. 

Zinc is a cost-effective and easy-to-apply material, offering an affordable corrosion-resistant coating. It is widely used to protect steel components from atmospheric corrosion and for decorative finishes, providing reliable protection at a lower cost compared to other metal coatings.


TypesDescriptionAvailableHL Parts
IZinc plating only,no treatment-
IIColored chromate passivation96
IIIColorless chromate passivation12
IVPhonsphate conwersion film-
VColorless passivation without hwxavalent chromium72
VIColored passivation without hexavalent chromium120

Plating Environment for Each Film Thickness


Classification number and conversion coating suffixMinimum thickness of plating（μm）Condition
Fe/Zn 2525SC4-Very harsh:exposure to harsh conditions or frequent exposure to moisture,detergents and salt water solutions,plus possible damage feom dents,scratches or abrasion.
Fe/Zn 1212SC3-Harsh: Exposure to condensation, sweat, rain and detergents.
Fe/Zn 88SC2-Moderate, exposed to dry indoor environments, but occasional condensation, wear and tear.
Fe/Zn 55SC1-Mild, exposed to indoor atmosphere, with rare condensation and minimal wear.


HL Parts Zinc Plating Capability

● Base material: steel, copper alloy, zinc alloy, stainless steel, aluminum alloy

● Reference standard: ASTM B633;

● Film thickness grade ：5μm、8μm、12μm、25μm

● Passivation methods: environmentally friendly: blue and white zinc, colored zinc, yellow zinc, black zinc.

● Non-environmental: military green zinc, white zinc, black zinc.

● Test methods: X-ray spectrometry film thickness test, zinc layer adhesion test, salt spray test, hydrogen embrittlement test.

Base MaterialSteel, copper alloy, zinc alloy, stainless steelAluminum alloy

Maximum processing size (cm)

230*50*10050*45*80

Unit price maximum weight (kg)

10040
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