Surface Treated Metal Materials, Method of Treating the Surfaces Thereof, Resin Coated Metal Materials, Cans and Can Lids
A surface-treated metal material having, formed on the surface of a metal base member, an inorganic surface-treating layer that contains inorganic components or, further having an organic surface-treating layer formed on the inorganic surface-treating layer, the inorganic surface-treating layer containing at least M (M is at least one of Ti, Zr and Al), O and F. The organic surface-treating layer contains a silane coupling agent containing Si in an amount of 0.8 to 30 mg/m 2 or a phenol-type water-soluble organic compound.
1 . A method of treating the surfaces of a metal base member by forming an inorganic coating on the surfaces of the metal base member by intermittently conducting a cathodic electrolytic treatment in an aqueous solution containing Ti and F, and having a phosphoric acid ion concentration calculated as PO 4 of smaller than 0.003 mols/liter.
2 . The method of treating the surfaces according to claim 1 , wherein said aqueous solution contains Zr.
3 . The method of treating the surfaces according to claim 1 , wherein said aqueous solution contains M (M is Ti or Ti and Zr) in an amount of 0.010 to 0.050 mols/liter and F in an amount of 0.03 to 0.35 mols/liter as bath concentrations.
4 . The method of treating the surfaces according to claim 1 , wherein said aqueous solution contains water-dispersing silica.
5 . A method of treating the surfaces of a metal base member by forming an inorganic coating on the surfaces of the metal base member by intermittently conducting a cathodic electrolytic treatment in an aqueous solution containing Zr, F and water-dispersing silica, and having a phosphoric acid ion concentration calculated as PO 4 of smaller than 0.003 mols/liter.
6 . The method of treating the surfaces according to claim 5 , wherein said aqueous solution contains Zr in an amount of 0.010 to 0.050 mols/liter and F in an amount of 0.03 to 0.35 mols/liter as bath concentrations.