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
Zinc Yellow Plating Services in Nashik
Zinc yellow plating adds a yellow chromate passivation over the zinc layer, giving noticeably better corrosion resistance than blue passivation along with the familiar iridescent gold-yellow finish used across the automotive and engineering industries. It is the preferred choice for chassis hardware, clamps and fasteners exposed to moisture and road conditions.
Why choose this finish
Benefits of Zinc Yellow Plating
Higher corrosion resistance
Yellow passivation extends time to white rust compared with blue passivation.
Instant visual identification
The gold-yellow finish makes plated parts easy to identify on the assembly line.
Self-healing chromate layer
The passivation film helps protect minor scratches that occur during handling.
Proven for automotive hardware
A long-established finish for underbody and engine-bay components.
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 | 5 to 12 microns (higher on request, per drawing) |
| Passivation | Yellow chromate over bright zinc |
| Appearance | Iridescent gold-yellow |
| Salt spray guidance | Typically 96 to 120+ hours to white rust (ASTM B117), dependent on thickness and geometry |
| Reference standards | ASTM B633, ISO 2081, IS 1573 or customer specification |
Applications
Commonly plated components
- Chassis and underbody hardware
- Hose and pipe clamps
- Heavy-duty fasteners
- Agricultural and industrial equipment parts
How we process it
- 01 Inward challan and batch registration
- 02 Degreasing and acid wash
- 03 Zinc Yellow Plating
- 04 Inspection and industrial packing
- 05 Dispatch with outward challan
FAQ
Zinc Yellow Plating questions
What is the difference between zinc blue and zinc yellow plating?
Both use the same electroplated zinc layer; the difference is the passivation. Yellow chromate gives a thicker conversion film with better corrosion resistance and a gold-yellow colour, while blue passivation is thinner, more economical and silver-blue in appearance.
Is zinc yellow suitable for parts exposed to weather?
Yellow passivated zinc is commonly specified for underbody, chassis and outdoor hardware because of its higher salt spray performance. For the most demanding conditions we can recommend thicker deposits or a lacquer top coat.
Can you match an existing yellow finish?
Share a reference sample or the specification on your drawing and we will confirm the passivation and thickness needed to match it.
Related services
Other finishes we offer
Trivalent Blue Plating
Hexavalent-chromium-free trivalent (Cr3+) passivation over zinc, suited to RoHS and ELV-driven automotive supply chains.
View process details
Trivalent Yellow Plating
Trivalent (Cr3+) yellow passivation over zinc for a hexavalent-free finish with high corrosion resistance and a yellow-iridescent look.
View process details