Why do thermos cups develop rust spots after prolonged use
Stainless steel is not absolutely rust-proof, but it is resistant to corrosion, protected by a rust-proof film on its surface. If the film is damaged, it will rust. Main causes of rusting Residual corrosion Minerals and chloride ions in tap water, as well as residues from tea, juice, salt, and beverages, adhere over a long […]
