Acid Zinc-Nickel Barrel Plating Equipment
Barrel Acid Zinc-Nickel Plating Equipment (JYC-Ni-Coating-Acid-Series)
Built for High-Strength Bolts at High Speed
Grade 8.8 and above high-strength bolts. They need corrosion protection and cost control. Our Barrel Acid Zinc-Nickel Plating Equipment meets this need. It uses a chloride acid system for zinc-nickel co-deposition. Nickel content is 10% to 14%. Current efficiency exceeds 90%. Plating speed is 40% faster than alkaline systems. The coating has built-in lubricity. Thread torque and preload force stay stable. Neutral salt spray tests reach 400 to 600 hours. This meets ASTM F2329. It can replace hot-dip galvanizing.
Materials and Construction for Acid Resistance
All parts that contact the solution use titanium or acid-resistant PP. The barrel side walls have elongated holes. This increases solution flow rate. The conductive mechanism uses a full copper shaft and corrosion-resistant beryllium copper contacts. This ensures uniform current distribution for every basket of parts. High-power titanium heating tubes and cooling coils precisely control bath temperature at 22 to 28°C.
Three Core Advantages
First, alloy composition is uniform.
Complexing agents ensure that parts inside and outside the barrel get consistent zinc-nickel alloy composition. There is no issue of high nickel on edge parts and low nickel on center parts.
Second, control is intelligent.
A PLC collects total current and pH data. pH is controlled at 5.8 to 6.2. The system calculates brightener and complexing agent consumption automatically. It adds them through flow meter closed-loop control.
Third, post-treatment is integrated.
The equipment connects directly to trivalent chromium clear passivation. It includes a powerful dryer to prevent white rust during storage. You can also add a hydrogen embrittlement testing station.
What Buyers Often Ask
Buyers ask us: "High-strength fastener customers fear hydrogen embrittlement fracture most. How do you solve this?" Our equipment is optimized from formula to process for this problem. It meets ISO 9001:2015. Key safety parts like the main hoist hook have dual brakes and fall prevention devices. We support custom designs. Whether stepped or circular barrel layout, we can design based on your workshop dimensions. All welding follows German Welding Society DVS standards. We provide a 72-hour continuous full-load test report.
Technical Specifications
|
Parameter |
Specification |
|
Coating Nickel Content |
10% – 14% |
|
Current Efficiency |
> 90% |
|
Salt Spray Test |
400 – 600 h |
|
Bath Temperature |
22 – 28°C |
|
pH Range |
5.8 – 6.2 (automatic control) |
|
Applicable Standards |
ASTM F2329, ISO 9001:2015, DVS |
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