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, сок, salt, and beverages, adhere over a long period, eroding the protective film.
Human scratching
Scrubbing with steel wool or a hard brush wears away the rust-proof layer, leaving tiny rust spots.
Damp and waterlogged
После стирки, not wiping dry or hanging upside down to drain, leading to long-term moisture, oxidation, and rusting.
Handling and usage reminder
Surface small yellow rust spots: Soak and wipe with white vinegar or citric acid, rinse and dry, and then it can be used normally.
Dents and extensive deep rust: The material of the cup body has been corroded, making it prone to harboring dirt and bacteria. Replacement is recommended.
routine maintenance
Do not use hard tools for scrubbing, and avoid leaving drinks and tea overnight. После уборки, make sure to thoroughly dry them.
