Standards Reference
ASTM B633 Defines How Zinc Electroplated Coatings Are Specified
ASTM B633 is a common specification for zinc electroplated coatings on iron and steel. It helps engineering, QA, and procurement teams align coating class, finish designation, and supplementary requirements in one clear callout.
Typical Specification Elements to Confirm
Coating Class
Specify required thickness class based on corrosion target and end-use environment.
Chromate / Passivation Type
Define finish requirement (for example clear/blue, yellow, or black) where applicable.
Supplementary Treatments
Include sealer or additional treatment notes if required by customer or OEM documentation.
Embrittlement Relief
For high-strength steel, confirm hydrogen embrittlement relief requirements in the part specification.
RFQ and Drawing Checklist for ASTM B633 Work
- Material grade and part function
- Required coating class / thickness target
- Finish and passivation requirement
- Salt spray or corrosion acceptance criteria
- Any OEM or customer-specific supplementary notes
Related Pages
Zinc Plating Services
Main zinc plating service page with process scope and finish options.
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