China Electrolytic Tinplate Steel Coil Suppliers - High-Quality Factory Grades SPCC, MR, Various Finishes
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
Q: What is tinplate coil and what is it used for?
Tinplate coil is sheet steel coated with a protective layer of tin. It is widely utilized in the manufacturing of food and beverage packaging, aerosol cans, paint drums, and various other industrial and consumer products.
Q: What solutions does QINGDAO SINCERELY STEEL offer for tin protection?
QINGDAO SINCERELY STEEL provides advanced formulations for both electrolytic tinning line (ETL) and electrolytic chroming line (ECL) processes. Their offerings include both traditional chrome-based formulations and eco-friendly chrome-free alternatives.
Q: Why is cleaning critical before the electro-tinning process?
Electro-tinning demands exceptionally clean steel surfaces to ensure proper tin adhesion. High-performance alkaline cleaners are required to thoroughly remove residues from the rolling process, such as oils, lubricants, and iron particles.
Q: What are Chrome-Free Passivation Alternatives (CFPA)?
CFPA refers to chrome-free passivation technologies developed to replace Chromium VI, which faces strict bans under upcoming REACH regulations. These alternatives allow manufacturers to achieve compliant and sustainable tinplate passivation.
Q: What is the difference between equally coated and differentially coated tinplate?
Equally coated tinplate has the exact same thickness/mass of tin coating applied to both sides of the steel sheet. Differentially coated tinplate has a heavier coating mass on one side compared to the other, customized for specific packaging requirements.