Venkateshwara Engineering
    VENKATESHWARA
    Engineering
    Back to Surface Treatments
    Capability 25

    Zinc Blue/Yellow Painting

    Electroplated zinc with blue or yellow chromate passivation — corrosion and aesthetic protection for fasteners and precision parts.

    Technical data

    By the numbers.

    Every figure is a working machine specification, not a catalogue estimate. Our equipment is calibrated quarterly.

    Zinc layer thickness5 – 25 µm (to spec)
    Chromate typeBlue-bright (clear) or Yellow iridescent
    Salt-spray resistance (blue)72 – 120 hours (ISO 9227)
    Salt-spray resistance (yellow)200 – 240 hours (ISO 9227)
    Barrel plating capacityUp to 50 kg per load
    Rack plating capacity600 × 400 × 300 mm per rack
    Max part size (rack)600 × 400 × 300 mm
    Hydrogen embrittlement reliefBake @ 200°C / 4 hrs (on request)
    Zinc Blue/Yellow Painting process at our facility
    Quality in action

    See how we deliver precision.

    Our state-of-the-art facility houses the latest equipment operated by certified technicians. Every process is monitored and documented to ensure consistent quality across all production runs.

    ISO 9001:2025 certified
    24/7 quality monitoring
    Certified technicians
    Digital traceability
    What's included

    Capabilities in detail.

    Blue-bright and yellow chromate options for colour-coded parts
    Barrel plating for bulk fasteners and small components
    Rack plating for precision or large single parts
    Thickness certification to customer specification
    Hydrogen embrittlement relief bake for high-strength fasteners
    RoHS-compliant trivalent chromate available
    Materials processed
    Mild Steel FastenersCold-Rolled Steel ComponentsMachined Steel PartsCast Iron (limited — confirm porosity)Spring Steel (with embrittlement relief)
    Typical applications
    • Bolts, nuts, washers and threaded fasteners
    • Stamped and machined brackets
    • Automotive and electrical connectors
    • General engineering components requiring colour identification
    Need mill certs?

    All materials supplied with EN 10204 3.1 traceability on request.

    Ask our team
    How it works

    Our process, simplified.

    From initial consultation to final delivery, we maintain transparency and quality at every step.

    01

    Consultation

    Requirements gathering & feasibility analysis

    02

    Design

    3D modeling & engineering approval

    03

    Fabrication

    Precision manufacturing & in-process QC

    04

    Delivery

    Final inspection & logistics coordination

    FAQs

    Common questions.

    Can't find your answer? Email our team

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    Start your project

    Ready to discuss your zinc blue/yellow painting project?

    Send us your drawings or spec sheet. We'll have a quote and schedule back to you within 24 hours.