Application description:

Widely used for food cans (vegetables, fruits, meat), beverage cans, aerosol cans, bottle crowns, metal caps, paint tins, chemical drums, and battery casings. Also serves for electronic shielding parts, toys, and baking trays. The tin coating provides excellent corrosion resistance, solderability, and printability, making it ideal for packaging that requires hygiene and long shelf life.

Production description

The process begins with low-carbon cold rolled steel coils. Coils are cleaned in alkaline solution, pickled, and rinsed to remove surface contaminants. They are then annealed (batch or continuous) to recrystallize the steel and restore ductility. A temper rolling step (skin pass) improves flatness and mechanical properties. The coils proceed to the electrolytic tinning line where they are pickled again, then passed through plating tanks containing tin anodes, depositing a uniform tin coating onto both surfaces. After plating, the coated strip is heated above the melting point of tin (softening) to form a bright, continuous tin-iron alloy layer. A chemical passivation treatment (chromate) is applied to enhance corrosion resistance. Finally, oil is electrostatically applied (DOS or ATO oil) for lubrication and protection. The finished coils are inspected for coating weight, surface finish, and hardness, then slit or cut as required.

Shipping Packaging

For export, tinplate sheets/coils are interleaved with VCI paper and moisture-proof film, packed on ISPM-15 certified wooden pallets or steel skids, secured with steel straps, and protected with edge protectors. Labels include grade, tin coating weight, dimensions, and heat number for safe sea freight.

Why Choose Us?

1.Factory Strength – We are a direct manufacturer with integrated cold rolling, annealing, and electrolytic tinning lines, ensuring stable supply and full process control.

2.Quality Assurance – Strict in-process inspections including pin-hole test, tin coating weight analysis, hardness (T1–T5), and soldering performance check; all products comply with ISO 9001 and JIS G3303 standards.

3.Certifications & Reports – We provide mill test certificates (MTC) with each shipment, and can supply third-party inspection reports (SGS, BV) upon request.

4.Customization & Service – We support custom thickness (0.15–0.60mm), width, coil weight, differential tin coating, and passivation types (311/312); responsive technical support for your packaging applications.

5.Export Experience – Professional packing with VCI paper, moisture protection, and ISPM-15 pallets; full documentation and timely shipment worldwide.

FAQ

1. Is your tinplate suitable for direct food contact?
Yes, our tinplate complies with international food safety standards, including EU (EC) 1935/2004 and US FDA regulations, with passivation types 311 and 312 available for safe food packaging.

2. How should tinplate be stored to avoid rust before use?
Tinplate should be kept in a dry, well-ventilated warehouse at 20–30°C with humidity below 70%. Avoid direct contact with water, acid, or alkaline substances. Use within 6 months of delivery for best results.

3. Can you provide third-party test reports for coating weight and corrosion resistance?
Yes, we can provide SGS or BV inspection reports upon request, including tin coating weight analysis, porosity (pin-hole) test, and K-wert (corrosion resistance) value.