Meeting ASTM-B633 specifications as well as other recognized industry standards for various types of parts employed in a wide range of service conditions, this includes stringent military and industrial standards for zinc plating.
Manufacturers often specify 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 a part. Zinc plating is used on both small and large parts. Small items suitable for zinc coating may include screws and other light fasteners, crank handles, light switch plates, springs and other small parts. Larger items suitable for zinc coating may include frames, chassis and other hardware pieces.
H&W Global offers a range of zinc finishing services that comply with nearly all industry specifications. ASTM B633 is the most common zinc plating specification. ASTM B633encompasses four classes of zinc plating which vary in thickness:
The numbers above indicate the thickness of the coating in microns (µm).
Zinc Plating is commonly used in a variety of industries, including industrial and defense. The normal zinc-plated coating is dull gray in color with a matte finish. The coating is entirely pure zinc, which has a hardness about one-third to one-half that of most steels. Zinc coating is usually thin, ranging up to 1 mil (25 µm). This generally restricts zinc-plated parts to very mild exposures. Materials for use in moderate or severe applications must be chromate conversion coated.
H&W’s Zinc Plating services include the following steps: racking, cleaning, etching, deoxidizing (desmutting), anodizing, dyeing, sealing, unracking, rinsing and packaging. Each can be customized for your specific metal and desired coating type.