Zinc Plating

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Zinc plating is an economical sacrificial coating to protect parts from corrosion.  Post-plate treatments, such as chromates and sealers, can offer additional protection. 

Specifications ASTM B633-15
Classifications KEY: Classification Number, Service Condition, Thickness

Fe/Zn 25, SC4 (very severe), 25µm or 0.001″
Fe/Zn 12, SC3 (severe), 12µm or 0.0005″
Fe/Zn 8, SC2 (moderate), 8 µm or 0.0003″
Fe/Zn 5, SC1 (mild), 5 µm or 0.0002″
Finish Type and Corrosion Resistance KEY: Type – Description, Minimum salt spray hours

I – Without supplementary treatments, --
II - With colored chromate coatings, 96
III – With colorless chromate conversion coatings, 12
V – With colorless passivate, 72
VI – With colored passivate, 120
  • RoHS compliant and non-RoHS compliant chromate conversions for zinc plating available.
  • Corrosion testing according to ASTM B117 can be provided by request.
  • Post plate sealers can be added to increase corrosion resistance to over 300 hours.
  • On-site part baking for hydrogen embrittlement relief available.
  • Detailed metal masking solutions are available to ensure that finishes are applied precisely.
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