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Zinc Electroplating Finish

Zinc plating is identical to electro-galvanizing in principle because both are electro-deposition processes. However, zinc plating is used on small parts such as fasteners, crank handles, springs and other hardware items ratherthan sheet metal. The zinc is applied as an expendable electrode in a cyanide, alkaline non-cyanide, or acid chloride salt solution. Cyanide baths are the most operationally efficient but can potentially create pollutionand are hazardous.

After alkaline or electrolytic cleaning, pickling to remove surface oxides, and rinsing, the parts are loaded into a barrel, rack, or drum and immersed in the plating solution. Various brightening agents may be added to the solution to add luster, but careful control is needed to ensure a quality product. Post-plating treatments may be used to passivate the zinc surface as well as impart various translucent colors or to extend the life of the coating.

Zinc plating is typically used for screws and other small fasteners, light switch plates, and various small parts that will be exposed in interior or mildly corrosive conditions. For use in moderate or severe environments,the materials must be chromate-conversion coated for additional corrosion protection.

Our Base Metal with Zinc Plating
Zinc Plated Stainless Steel Wire Zinc Plated Tungsten Wire
Zinc Plated Molybdenum Wire Zinc Plated Brass Wire
Zinc Plated Silver Wire Zinc Plated Beryllium Copper Wire
Zinc Plated Copper and Alloy Wire Zinc Plated Aluminum and Alloy Wire
Zinc Plated Nickel and Alloy Wire Zinc Plated Platnium Wire
Zinc Plated Kovar® Wire Zinc Plated Monel® Wire
Zinc Plated Titanium Wire Zinc Plated Resistance Wire
and many more!

Our Size Capabilities (can attempt larger/smaller)

Round Wire: 0.0010" - 0.312" / 50 AWG to 1/0 AWG / 0.0254 - 7.925mm

Flat Wire: Thickness: from 0.0015" to 0.250" / Width: not to exceed 0.750"

Square Wire: 0.010" x 0.010" - 0.025" x 0.025"

Our Plating Capabilities

Under Plate (Flash): 1-5000 micro inches (0.000001" - 0.0050")

Main Plate: 10 micro inches to 1000 micro inches (0.00001" - 0.001")

We can do Zinc plating to

  • ISO 2081 (replaces BS 1706 and BS EN 12329)
  • ASTM B633
  • Def Stan 03-20 (replaces DTD 903D)
  • MIL-STD-171 1.9.1, 1.9.2
  • BS 7371-3 (replaces BS 3382)
  • ISO 4042

What thickness should I use for ...?

The thickness of zinc plating that you should use depends on the environment that the component is in. We have produced some recommendations based on what we find is suitable for most of our customers. The corrosion resistance of the zinc depends on two things:

  • zinc thickness — this protects the base material from corrosion (often referred to as protection to "red rust")
  • passivation — this protects the zinc from corrosion (often referred to as protection to "white rust")

The protection from the zinc plating is proportional to the thickness of the zinc plating - so thicker zinc means more protection for the base metal. Thickness has almost no effect on the resistance to "white rust" because this involves the coating itself corroding.

Environmental Conditions Wear/Abrasion Conditions Examples Suggested (Minimum) Thickness ISO 2081 Designation
Dry, clean, indoor Minimal Offices, domestic premises (excluding kitchens and bathrooms) 5µm Zinc plate and clear passivate Fe/Zn5/A
Clean, indoor, minimal condensation Minimal Warehouses, light assembly workshops 8µm Zinc plate and clear passivate Fe/Zn8/A
Indoors or covered outdoors Some Light industry (excluding exposure to corrosive substances), in domestic garden areas covered by roofs. 12µm Zinc plate and clear passivate Fe/Zn12/A
Outdoors Some, risk of scratching or denting Industry (with limited exposure to corrosive substances), marine environments (not immersed, not splashed), outdoors. 25µm Zinc plate and clear passivate Fe/Zn25/A

Custom Thickness: Send in a Request for Quote

Request a quotation with us, and we will assist you in the best of our ability with our amazing sales team.

If you require further information please feel free to contact us at (330)244-8501
our hours are 8 AM - 5 PM, weekdays, EST. or email us your specifications at

Semi-Precious Electroplating Finishes We Offer

  • Nickel

    Standard nickel plated conductors have a minimum plating thickness of 50 micro-inches (1.25 microns) as specified in ASTM B 355.

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  • Copper

    HSM Wire International Inc. provides copper plating on many types of base materials.

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  • Tin

    Tin plating is used only on base materials that are not exposed to high temperature processing after the tin is applied.

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  • Zinc

    We do Silver Plating to QQ-S-365, ASTM B-700, Bright or Matte Finish.

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  • Brass

    We do Silver Plating to QQ-S-365, ASTM B-700, Bright or Matte Finish.

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