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Quality Plating Co., Inc.

801-355-7424

sales@qualityplating.com

Services/Finishes: We offer a wide range of plating finishes as indicated by the following list. We have included some general information, but please contact us to answer questions related to your specific needs.

Zinc Plating

Parts up to 116 inches long

ASTM B633 All types and classes

Zinc plating is a process which deposits a thin layer of zinc over a metal substrate which is usually steel. It is different from galvanizing because zinc plating is an electro-chemical process and not a dip in molten zinc like galvanizing. The advantages of zinc plating over galvanizing are control over zinc thicknesses, smoother surfaces and less damaging to fragile parts. The disavantage is less corrosion resistance since the zinc thickness is much thinner. Zinc plating has also been called electrogalvanizing.

Zinc plating is commonly used on fasteners and sheet metal fabricated parts in thickness from 0.0001" to 0.0005" thick. It should be noted that since zinc plating is an electroplating process thickness will vary with locations on the part and inside areas will not be plated without special considerations.

Zinc plating protects the steel as a sacrificial coating as well as a barrier like nickel plating. The advantage of a sacrificial coating is if the coating is damaged, the rust has a more difficult time penetrating the material around the damaged coating. Zinc plating is also a good paint base and it will greatly improve the corrosion resistance of the paint.

The actual zinc plating is RoHS compliant; however, the chromates which are applied to the zinc plating to increase the corrosion resistance are not necessarily RoHS complaint. At this time our clear chromate, Type III, is RoHS compliant. We still offer a yellow chromate, Type II, which does not meet RoHS commpliance. We do offer a heavy build chromate with is a greenish-blue color which will meet the salt spray requirements of a traditional yellow chromate and it offers RoHS compliance.