How is tinplate scrap detinned electrolytically?

To detin tinplate scrap electrolytically, the scrap is placed in a solution of hot caustic soda, which dissolves the tin coating from the steel. Through the process of electrolysis, the tin is then recovered from this solution as metallic tin.12

This method is highly effective for processing both clean can-makers' scrap and used cans. It serves two primary purposes: it produces high-grade tin and yields clean steel scrap, which can then be returned to steelmakers for reuse. This process is a vital component of secondary tin production, ensuring that valuable materials are reclaimed efficiently.2