China Electrolytic Tinplate Steel Coil Suppliers - High Quality Factory Direct 0.15-0.70mm Thickness
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.
There are two types coating of mass: the Equally coated Mass (in which both sides have the same mass of tin coating) and the 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
What is tinplate coil and what are its main applications?
Tinplate coil is sheet steel coated with a protective layer of tin. It is widely used in the manufacturing of food and beverage packaging, aerosol cans, paint drums, and various other end products.
What solutions does QINGDAO SINCERELY STEEL offer for surface protection?
QINGDAO SINCERELY STEEL offers innovative solutions for both electrolytic tinning lines (ETL) and electrolytic chroming lines (ECL). These solutions include chrome-based and environmentally friendly chrome-free formulations.
How is surface cleanliness ensured during the electro-tinning process?
Strong alkaline cleaners are used to remove residues like oil and iron from rolling operations. These cleaners can be applied via dipping, spraying, brushing, or through electrolytic processes, supported by Foam Fighter additives.
What is Chrome-Free Passivation Alternative (CFPA)?
CFPA represents chrome-free technologies used for tin passivation. Since Chromium VI is expected to be banned under REACH regulations, these alternatives allow manufacturers to transition to compliant, eco-friendly processes.
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 (e.g., 2.8/2.8 g/m²). Differentially Coated tinplate has one side coated more heavily than the other (e.g., 5.6/2.8 g/m²) to suit specific application needs.