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Electrolytic Tinplate Steel Coil - SPCC, MR, T1-T5 Temper, China Suppliers & Factory Direct Offer
Description
Tinplate coil refers to sheet steel that is coated with tin. This material is commonly used in food and beverage packaging, as well as aerosol cans, paint drums and other end products. QINGDAO SINCERELY STEEL offers innovative solutions for electrolytic tinning line (ETL) and electrolytic chroming line (ECL) processes that increase tin protection. This includes chrome-based and chrome-free formulations.
Cleaning
The electro-tinning process requires particularly clean surfaces. Henkel provides a portfolio of strong alkaline cleaners to deal with residues from the rolling operation, such as oil and iron. QINGDAO SINCERELY STEEL products cover all applications, from easy-to-use one-component liquid cleaners through to more sophisticated systems where surfactants are dosed separately to boost cleaning efficiency on demand.
QINGDAO SINCERELY STEEL products are also applied by dipping the strip into a solution, or via spray or brush mode, and in electrolytic processes. Our range of Foam Fighter additives are also popular for use in electro-tinning lines.
Passivation
Currently, most passivation processes that take place after electro-tinning (ETL) still involve technologies containing Chromium VI. However, this substance is expected to be banned under REACH regulations in the coming years. For this reason, chrome-free technologies for tinplating are gaining popularity. QINGDAO SINCERELY STEEL products are used to enable electro-tinning processes with chrome-free solutions for passivation of the tin. These are known as Chrome-Free Passivation Alternatives (CFPA), and they empower our customers to stay ahead of this regulatory trend.
Coating Mass / Coating weights for tinplate
There are two types coating of mass:
- Equally coated Mass: In which both sides have the same mass of tin coating.
- Differentially Coated Mass: In which one side is more heavily coated than the other.
| Letter symbol of classification | Type of Coating | Designation of coating mass | Nominal coating mass (g/m²) | Minimum average coating mass (g/m²) | Former designation coating mass |
|---|---|---|---|---|---|
| SPTE Tinplate | Equally coating | 2.8/2.8 | 2.8/2.8 | 2.45/2.45 | #25 |
| 5.6/5.6 | 5.6/5.6 | 5.05/5.05 | #50 | ||
| 8.4/8.4 | 8.4/8.4 | 7.55/7.55 | #75 | ||
| 11.2/11.2 | 11.2/11.2 | 10.1/10.1 | #100 | ||
| Differentially coated | 5.6/2.8 | 5.6/2.8 | 5.05/2.45 | #50/25 | |
| 8.4/2.8 | 8.4/2.8 | 7.55/2.45 | #75/25 | ||
| 8.4/5.6 | 8.4/5.6 | 7.55/5.05 | #75/50 | ||
| 11.2/2.8 | 11.2/2.8 | 10.1/2.45 | #100/25 | ||
| 11.2/5.6 | 11.2/5.6 | 10.1/5.05 | #100/50 | ||
| 11.2/8.4 | 11.2/8.4 | 10.1/7.55 | #100/75 |
Frequently Asked Questions (FAQ)
What is tinplate coil and what are its primary applications?
Tinplate coil is sheet steel coated with a thin layer of tin. It is widely used for manufacturing food and beverage packaging, aerosol cans, paint drums, and various other container products.
What is the difference between Equally Coated and Differentially Coated tinplate?
Equally coated tinplate has the exact same mass of tin coating on both sides of the steel sheet. Differentially coated tinplate has a heavier tin coating on one side than the other to meet specific internal and external protection requirements.
Why is the cleaning process crucial in electro-tinning?
The electro-tinning process demands extremely clean surfaces to ensure proper tin adhesion. Strong alkaline cleaners are used to remove rolling residues such as oil, iron dust, and other contaminants before the tinplating stage.
What is Chrome-Free Passivation Alternative (CFPA) in tinplating?
CFPA is an environmentally friendly passivation technology developed to replace traditional Chromium VI processes, which face bans under REACH regulations. It provides excellent tin protection without using hazardous chromium substances.
How are QINGDAO SINCERELY STEEL cleaning products applied?
Our products can be applied by dipping the steel strip into a chemical solution, via spray or brush mode, or through electrolytic cleaning processes. We also provide Foam Fighter additives to optimize electro-tinning line operations.