Abstract
In order to develop the metal plated steel sheet with excellent corrosion resistance for drinking can, we studied corrosion behavior of Sn electroplated sheet and TFS sheet under corrosive environment in the can and effect of chromium added steel as base metal on corrosion resistance.
As a result, it was proved that corrosion resistance of these electroplated steel sheet is increased with increase of chromium amount contained in the steel. Furthermore, as a result of analysis of oxide film property on steel surface, it was presumed that coating property of Cr2O3 base coating film is superior with greater than 7 wt% of chromium amount and is apt to form stable passivation film in aqueous solution of phosphoric acid and citric acid, becoming one of factors for improvement of corrosion resistance.
