Hot-dip galvanizing production process
1.Pretreatment: The substrate undergoes degreasing to remove oil and dirt, pickling to remove rust and oxide scale, rinsing and cleaning, and flux treatment.
2.Immersion plating: Immersion in molten zinc at 445℃-465℃, forming a double-layer structure of zinc-iron alloy layer and pure zinc layer on the surface.
3.Post-treatment: Slow cooling and straightening, cleaning of zinc nodules and burrs, and testing of zinc layer thickness and adhesion.
4.Inspection: Visual inspection of each piece, sampling for salt spray test and mechanical property test, and issuance of test report.
Comparison of Parameters for Two Galvanizing Processes
| Parameter | Hot-Dip Galvanized Yoke Plate | Electro-Galvanized Yoke Plate |
| Zinc Coating Thickness | 85 – 120 μm | 10 – 30 μm |
| Salt Spray Test | ≥ 500 hours | ≥ 200 hours (after passivation) |
| Outdoor Service Life | 10 – 15 years | 3 – 5 years |
| Coating Adhesion | ≥ 10 N/mm², metallurgical bond | ≥ 5 N/mm², moderate adhesion |
| Dimensional Accuracy | Tolerance ≤ ±0.1 mm | Tolerance ≤ ±0.05 mm |
| Sacrificial Anode Protection | Yes, self-healing on scratches | No |
| Application Environment | Heavy corrosion: outdoor, coastal, chemical | Mild corrosion: indoor, dry outdoor areas |
Core product advantages
1.Excellent corrosion resistance: Hot-dip galvanizing forms a double-layer structure of zinc-iron alloy layer + pure zinc layer, possessing sacrificial anode self-healing properties, protecting the substrate even with localized scratches.
2.Strong zinc layer adhesion: Metallurgical bonding, adhesion ≥10N/mm², does not detach under bending impact, and is not prone to peeling or flaking during long-term operation.
3.Complete range of sizes: Wide customization range, length 50~3000mm, width 30~1200mm, thickness 5~80mm. Both types can be produced.
4.Highly flexible processing options: hot-dip galvanizing for heavy-duty corrosion protection, electro-galvanizing for high-precision small parts; optimal solution matched to your needs.
5.Complete testing reports: Complete testing reports are provided upon delivery, including zinc layer thickness, adhesion, and salt spray test results, ensuring traceable quality.
Application Scenarios
Power Engineering: Insulator string connections for overhead transmission lines, tension tower hardware
Marine & Port: Severely corrosive environments such as port machinery, shipbuilding, and coastal facilities
Chemical & Metallurgical: Highly corrosive conditions such as chemical workshops and outdoor heavy equipment
Indoor Applications: Electro-galvanized versions are suitable for indoor damp equipment, pump brackets, and electrical connectors
Supply and Service Guarantee
Professional Galvanized Yoke Plate manufacturer with ample production capacity and a complete product range:
Ample Production Capacity: Professional R&D team combined with advanced production and testing equipment, capable of handling large-volume global orders with stable delivery
Foreign Trade Services: Long-term cooperation with multiple countries, familiar with import regulations, providing integrated solutions for customization, logistics, and after-sales service.
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