From steel to packaging steel – before finally becoming a can
From the ends and bottoms of pet food cans, to mounting cups on aerosol cans, right through to crown corks and offset ink tins – the cutting-edge coating facility supplies special chromium-coated steel for different types of steel packaging. Thanks to its extremely thin coating, the material is ideal for further processing and protected against corrosion.
The new procedure for manufacturing special chromium-coated material – TCCT® – replaces chromium(VI) with chromium(III). “The technology is based on a patent from Tata Steel Ijmuiden B.V.. We acquired a license for it,” reports Oliver Hoffmann, CTO at thyssenkrupp Rasselstein. The company’s existing competencies in the manufacturing of special chromium-coated steel in Andernach will be crucial in perfecting the procedure: “We have pooled our expertise in one joint technology team and this will allow us to further develop the procedure,” he explains. It’s not only customers who are set to benefit in the future, but also the company itself.
Chromium(VI)-free production on the new coating line
The changeover in the production of electrolytic chrome-plated packaging steel to a REACH-compliant process is underway. In the near future, the company will produce material for customers on coating line 13.The new line will produce only TCCT®. The quantities of chromium(VI)-free, electrolytic chrome-coated packaging steel from the ultra-modern coating line 13 will then be gradually increased and at the same time the production of ECCS on coating line 8 will be scaled back by the corresponding amount.
After approximately one year, coating line 13 will replace the current line that produces ECCS. From that date, our portfolio as packaging steel specialists will include only special chrome-coated packaging steel which has been produced 100-percent chromium (VI)-free.
For producers of steel packaging, TCCT® will in future enable the company to offer a REACH-compliant solution which entirely dispenses with the use of chromium(VI) in the manufacturing processes, while maintaining the usual high product quality. TCCT® is produced in accordance with the revised European standard EN 10202-2022 and is notable for the following advantages:
Boost to innovation with energy-saving effects
The new building in which coating line 13 has been constructed covers 10,000 square meters, or about one and a half soccer fields.
On coating line 13 blackplate will be surface coated with a nanometer-thin protective layer in an electrolytic bath. A further advantage of the modern system is as follows: “We are at the cutting edge of technology in every sense of the word – including in terms of energy consumption and occupational safety,” says Paul Michels, who was responsible for the project during construction. Oliver Hoffmann reveals another groundbreaking aspect of the system: “In the future we will be able to work with an even broader production range.” This means that even wider and thinner plates from the site that are even more sturdy and robust will soon be delivered as input stock for cans. “Our customers will of course benefit from this. Further progress will also be made possible, as our new measuring technology will go far beyond today’s standards.”
Cans made from tinplate are recycling champions
The modern system is state of the art from a technological perspective, especially because additional more efficient and energy-saving processes will be implemented using the digitalized workflow. Michels makes the following predication: “After further tests and calculations we can look forward to lower CO2 emissions from production.” The can also contributes to the recycling process: as the most frequently and most efficiently recycled packaging material, tinplate remains unparalleled when it comes to ecological sustainability.
The VA 13 in Andernach will ensure environmental conservation, occupational safety, and resource efficiency. The investment promises added value in many respects, as employees, manufacturers, customers, and consumers will all benefit equally from the switch to the new TCCT® process.