Plating Blue-White Zinc (Trivalent Blue Zinc)
Trivalent blue-white zinc electroplating for carbon steel fasteners: a bright, uniform finish with 48 h salt-spray protection and higher grades available on request.
| Finish Code | TZ001 |
|---|---|
| Environmental Grade | Trivalent chromium zinc plating, RoHS compliant |
| Salt Spray Standard | 48 h; higher grades available on request |
| Appearance / Colour | Bright blue-white, uniform |
| Suitable For | All types of screws and fasteners |
| Features | Corrosion resistant; economical for volume production |
| Environmental Compliance | REACH and RoHS compliant |
Overview
Surface finishing on a fastener is a functional coating, not a cosmetic one: it sets the friction coefficient that determines how much of the applied torque becomes clamp load, and it defines how long the part survives in a corrosive environment. Two finishes that look identical can differ by a factor of several in salt-spray hours and by enough in friction to change the torque specification. This listing: finish code TZ001, salt spray 48 h; higher grades available on request, appearance / colour Bright blue-white, uniform, environmental compliance REACH and RoHS compliant.
What sets this listing apart: Features Corrosion resistant; Environmental Grade Trivalent chromium zinc plating.
Advantages
Barrier coatings protect the base metal, while sacrificial coatings protect the steel even at a scratch; the choice depends on whether the joint will be damaged in service.
Hydrogen embrittlement risk separates processes: electroplating on high-strength steel needs a de-embrittlement bake, while mechanical and flake coatings avoid the risk entirely.
Friction coefficient changes with coating: a zinc-flake coating typically runs lower and more consistently than electroplated zinc, which is why torque tables are finish-specific.
Applications
Automotive underhood and body joints, outdoor equipment, marine and coastal installations, electronics hardware, and any joint where the torque specification is tied to a friction value.
Quote the standard, the hours and the acceptance criterion together — a salt-spray figure without the test method is not a specification. Check that the coating process is compatible with the core hardness of the part.
Product information is supplied by Toprecision. Custom parts can be produced to drawing — contact us for samples or a quotation.
Specifications across this series
3 parts in this series
| Part | Finish Code | Environmental Gr… | Salt Spray Stand… | Appearance / Col… |
|---|---|---|---|---|
| Plating Blue-White Zinc (Trivalent Blue Zinc) · TZ001 / Trivalent chromium zinc plating, RoHS compliant / 48 h; higher grades available on request | TZ001 | Trivalent chromium zinc plating, RoHS compliant | 48 h; higher grades available on request | Bright blue-white, uniform |
| Plating Colour Zinc (Iridescent / Trivalent Colour Zinc) · TZ002 / Trivalent chromium zinc plating, RoHS compliant / 72 h; higher grades available on request | TZ002 | Trivalent chromium zinc plating, RoHS compliant | 72 h; higher grades available on request | Iridescent colour passivate |
| Plating (Black Passivated Zinc) · TZ003 / Trivalent chromium zinc plating with black passivate, RoHS compliant / 48 h; higher grades available on request | TZ003 | Trivalent chromium zinc plating with black passivate, RoHS compliant | 48 h; higher grades available on request | Black, low reflectance |
Values are taken from each part’s own attribute set. Changing length, material or finish changes pull-out strength and installation torque, so compare the row that matches your drawing.
Selection and test data: engagement length, standards, salt-spray hours
FAQ
What does this finish provide?
Finish Code TZ001, Environmental Grade Trivalent chromium zinc plating, RoHS, Salt Spray Standard 48 h; higher grades available on request, Appearance / Colour Bright blue-white, uniform.
How does it affect torque and friction?
Carbon Steel.
What should I verify before ordering or installing it?
Quote the standard, the hours and the acceptance criterion together — a salt-spray figure without the test method is not a specification. Check that the coating process is compatible with the core hardness of the part.