Zinc Blue Plating
Bright zinc electroplating with blue passivation for sacrificial corrosion protection and a clean, uniform silver-blue finish.
View process detailsElectroplating service · Nashik, Maharashtra
Trivalent Yellow Plating Services in Nashik
Trivalent yellow plating gives you the appearance and corrosion performance customers associate with yellow zinc, while removing hexavalent chromium from the finish. A thick-film trivalent passivation, often with a sealer, delivers extended salt spray performance suitable for chassis, underbody and outdoor hardware that must also meet RoHS or ELV requirements.
Why choose this finish
Benefits of Trivalent Yellow Plating
Hexavalent free yellow finish
Meets RoHS and ELV chromium restrictions while keeping the familiar yellow appearance.
High corrosion resistance
Thick-film trivalent passivation, optionally sealed, for demanding service conditions.
Heat stable
Retains corrosion performance after de-embrittlement baking or downstream heat exposure.
Drop-in replacement
A compliant substitute where drawings previously called for hexavalent yellow zinc.
Specifications
Typical process parameters
Indicative values. Final thickness, passivation and testing requirements are set to your drawing or referenced standard at quotation.
| Base metals | Mild steel, alloy steel, forged and machined steel components |
|---|---|
| Typical thickness | 8 to 12 microns (higher on request, per drawing) |
| Passivation | Trivalent chromium (Cr3+) yellow / thick-film passivation, hexavalent free |
| Appearance | Yellow-iridescent |
| Salt spray guidance | Typically 120 to 200+ hours to white rust (ASTM B117) with sealer, dependent on thickness and geometry |
| Compliance | Supports RoHS and ELV hexavalent chromium restrictions |
Applications
Commonly plated components
- Chassis and suspension hardware
- Underbody brackets and clamps
- Outdoor and agricultural equipment
- Export automotive components
How we process it
- 01 Inward challan and batch registration
- 02 Degreasing and acid wash
- 03 Trivalent Yellow Plating
- 04 Inspection and industrial packing
- 05 Dispatch with outward challan
FAQ
Trivalent Yellow Plating questions
How does trivalent yellow differ from conventional zinc yellow?
Conventional zinc yellow uses a hexavalent chromate. Trivalent yellow uses a hexavalent-free Cr3+ passivation, frequently with a sealer, to reach equal or better corrosion performance with a similar yellow appearance.
Can trivalent yellow replace hexavalent yellow on an existing drawing?
In most cases yes. Share the drawing or the specification called out and we will confirm the equivalent trivalent process, thickness and sealer to meet it.
Does the colour vary between batches?
Trivalent yellow finishes are typically slightly less iridescent than hexavalent chromates and the shade can vary marginally with thickness. We control process parameters batch-wise to keep appearance consistent.
Related services
Other finishes we offer
Zinc Yellow Plating
Zinc plating with yellow passivation for enhanced corrosion resistance and the characteristic iridescent gold-yellow finish.
View process details
Trivalent Blue Plating
Hexavalent-chromium-free trivalent (Cr3+) passivation over zinc, suited to RoHS and ELV-driven automotive supply chains.
View process details