Zinc Rack Plating Line
Our Zinc Rack Plating Line is specifically designed for zinc electroplating of hardware parts, fasteners, stamping components, and mechanical parts. The alkaline zinc plating process delivers bright, uniform zinc deposits with excellent throwing power – ideal for complex-shaped parts.
This gantry-type zinc plating line features PLC-controlled hoist operation, automatic temperature control, and rectifier regulation for consistent plating quality. Available in fully automatic or semi-automatic versions.
Key Specifications
|
Parameter |
Specification |
|
Plating Type |
Alkaline Zinc Plating |
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Plating Thickness |
5-25 μm (customizable) |
|
Equipment Type |
Gantry Rack Plating Line |
|
Control System |
PLC with HMI touch screen |
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Operation Mode |
Fully automatic / Semi-automatic |
|
Anode Material |
Pure zinc plate |
|
Certification |
CE |
Technical Process
1. Ultrasonic Degreasing – Remove oil and grease from part surfaces
2. Electrolytic Degreasing – Deep cleaning via electrochemical reaction
3. Acid Pickling – Remove rust and oxidation from surface
4. Multi-stage Rinsing – Thorough cleaning before plating
5. Zinc Plating – Alkaline zinc bath, room temperature, current density 2-6 A/dm²
6. Multi-stage Rinsing – Remove plating solution residue
7. Nitric Acid Bright Dip – Enhance surface brightness
8. Trivalent Chromium Passivation – Blue, yellow, or black passivate per requirement
9. Hot Water Rinse & Drying – Final cleaning and drying
Why Alkaline Zinc?
|
Feature |
Alkaline Zinc (Our Line) |
Acid Zinc (Conventional) |
|
Throwing power |
Excellent – ideal for threaded/recessed parts |
Moderate – risk of thin coverage in deep areas |
|
Brightness |
Bright with nitric dip |
Very bright (often preferred for decorative) |
|
Efficiency |
Slightly lower current density (2-6 A/dm²) |
Higher current density (10-40 A/dm²) |
|
Hydrogen embrittlement risk |
Lower – safer for high-strength fasteners |
Higher |
|
RoHS compliance |
Yes |
Yes |
Bottom line: Choose alkaline for fasteners, automotive safety parts, and complex geometries.
Key Advantages
✅ Excellent Corrosion Protection – 48-120 hours salt spray resistance (depending on passivation type)
✅ Bright Uniform Finish – Alkaline zinc process provides brilliant, consistent zinc deposits
✅ Good Throwing Power – Excellent coverage on complex-shaped parts
✅ Multiple Passivation Options – Blue, yellow, black, or green trivalent chromium passivation available
✅ Trivalent Chromium – Environmentally friendly passivation meeting RoHS standards
✅ Automated Operation – PLC-controlled for consistent quality and reduced labor
Applications
Industrial hardware and tools
Fasteners (bolts, nuts, screws, washers)
Stamped metal parts
Machine components
Agricultural machinery parts
Construction hardware
Electrical components
Technical Parameters
|
Parameter |
Value |
|
Plating Bath Temperature |
20-25℃ (room temperature) |
|
Current Density |
2-6 A/dm² |
|
Plating Speed |
Approx. 1 μm per 1-2 minutes |
|
Passivation Types |
Blue / Yellow / Black / Green |
Trivalent Chromium Passivation Options
|
Passivation Type |
Appearance |
Salt Spray Resistance |
|
Blue Passivation |
Bright blue-white |
48-72 hours |
|
Yellow Passivation |
Iridescent yellow |
72-96 hours |
|
Black Passivation |
Deep black |
96-120 hours |
FAQ
Q: What salt spray hours can I get with yellow passivation on alkaline zinc?
A: Yellow trivalent passivation provides 72–96 hours of corrosion protection (ASTM B117) on alkaline zinc plated parts.
Q: Can you plate M4–M20 bolts on this rack line?
A: Yes. Our gantry rack line accepts rack sizes from 600×800mm to 1200×1500mm, covering M4 through M20 fasteners. Custom rack designs available.
Q: What is the typical lead time for a fully automatic zinc rack plating line?
A: 30–45 days from deposit. This includes design, fabrication, factory testing, and documentation. Industry average is 60–90 days.
Q: How does alkaline zinc compare to zinc-nickel alloy?
A: Zinc-nickel offers higher corrosion resistance (500+ hours) but costs 2–3x more. Alkaline zinc is the cost-effective choice for 48–120 hour requirements.
Q: Do you provide installation and training?
A: Yes. We provide on-site installation supervision, startup, and operator training. A 12-month warranty and lifetime technical support are included.
Why Choose JUNDA
|
Factor |
JUNDA |
Typical Competitor |
|
Delivery time |
30–45 days |
60–90 days |
|
Warranty |
12 months + lifetime support |
6–12 months |
|
Passivation options |
Blue / Yellow / Black / Green |
Usually only blue + yellow |
|
Custom layout |
Free CAD design |
Charged or limited |
|
CE certification |
Yes – full documentation |
Varies |
Direct manufacturer – No distributor markup
Customized layout – We adapt to your existing shop floor
Global reference – Projects in China, Southeast Asia, Middle East
Spare parts availability – Local stocking options available
Request your customized zinc plating line quotation today！
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Contact Info
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Address
Room 203, 2nd Floor, Building 5, No. 24 Chuangye Road, Haihong Subdistrict, Taizhou Bay New Area, Taizhou City, Zhejiang Province
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