Coating steel strips

摘要

A coated steel sheet member having high resistance to corrosion and having accelerated terne patina formation when exposed to the atmosphere to produce a dull, iron oxide corrosion resisting finish, the sheet member having thereon a layer of a lead/tin alloy (a terne coating) (10) coated with a translucent layer comprising asphalt. The coating layer comprises: Asphalt 60 - 80% Titanium oxide 1 - 25% Inert silicate or clay 8 - 11% Carbon black 0.5 - 2% Anti-settling agent 0.4 - 0.7%.