Zinc Plating

H&W Global

Zinc Plating: Clear & Yellow

  • ASTM-B633, various types and service conditions

Manufacturers seeking metal finishing services typically prefer zinc plating because it provides effective, long-lasting results at a relatively low cost. Zinc plating acts as a sacrificial anode that forms a protective barrier to prevent oxidation from reaching the surface of the part. Zinc plating is used on both small and large parts; common small parts include fasteners, crank handles, springs and other hardware items. Large parts include frames and chassis.

Zinc Plating ASTM B-633

Among the plating specifications we meet is ASTM B633. This specification lists four classes of zinc plating: Fe/Zn 5, Fe/Zn 8, Fe/Zn 12, and Fe/Zn 25. The number indicates the coating thickness in microns (µm).

More information about our Zinc Plating, which is available to various end users, including industrial and defense:

  • The normal zinc-plated coating is dull gray in color with a matte finish.
  • The coating is thin, ranging up to 1 mil (25 µm), restricting zinc-plated parts to very mild exposures.
  • The coating is entirely pure zinc, which has a hardness about one-third to one-half that of most steels.
  • Suitable application includes screws and other light fasteners, light switch plates, and other small parts, but also larger parts.
  • Materials for use in moderate or severe applications must be chromate conversion coated.
Zinc Plating ASTM B-633
Zinc Plating ASTM B-633

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