Blue-Bright Zinc
Blue-bright zinc is zinc plate with a thin trivalent passivate that gives a bluish-silver look. It is the common modern replacement for clear hexavalent chromate.
Blue-bright at a glance
| Specification | ASTM B633 Type V (colorless passivate) |
|---|---|
| Corrosion | Similar to clear; improved with a sealer or topcoat |
| RoHS | Compliant (no hexavalent chromium) |
These tables carry the same figures as the printed sheet below.
The printed sheet
See an error on this sheet?
Tell us what is wrong.
Text version of this sheet
Blue-bright zinc · trivalent passivate
FIELD IDENTIFICATION
What it is
Blue-bright zinc is zinc plate with a thin trivalent passivate that gives a bluish-silver look. It is the
common modern replacement for clear hexavalent chromate.
BLUE-BRIGHT
Bluish bright passivate
Blue-bright at a glance
Specification
ASTM B633 Type V (colorless passivate)
Corrosion
Similar to clear; improved with a sealer or topcoat
RoHS
Compliant (no hexavalent chromium)
Key points
Electroplating can load high-hardness steel with hydrogen. Parts at roughly HRC 39 and above (Grade 8, 10.9, 12.9, A574) need a qualified process and a
prompt embrittlement-relief bake, or a non-electrolytic coating instead.
Governing standards: ASTM B633; ASTM F1941/F1941M-16(2025). Editions shown are the latest confirmed as of September 2026. The drawing and the governing standard always
take precedence over this sheet.
torquing any fastener. Verify the current governing standard, project documents, OEM requirements, size, thread, coating and lot certification. To the fullest extent permitted by law, The Fastener App disclaims liability
arising from reliance on this reference.
Fastener Guide reference FG-8796C9 · thefastenerapp.com/fastener-guide/plating-coatings-finishes/blue-bright-zinc · © The Fastener App. Reference only — verify the current governing standard, drawing and manufacturer data before specifying or installing.
