Chemical conversion-treated metal plate
AssigneeNippon Steel Corporation
InventorsKoki Tanaka, Masao Kimura, Hiromasa Shoji, Hiromasa Nomura
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Abstract
To provide a chemical conversion-treated metal sheet excellent in the corrosion resistance and coating adhesion, free from elution of chromium oxide and small in the environmental load, there is provided a chemical conversion-treated metal sheet comprising a metal sheet having on at least one surface thereof an inorganic film, wherein the inorganic film is a film comprising as a main component one or both of a metal oxide and a metal hydroxide exclusive of Cr and the film contains F.
Claims13
A chemical conversion-treated metal sheet comprising a metal sheet having on at least one surface thereof an inorganic film,
- wherein said inorganic film is a film having a metal component, said inorganic film comprising one or both of a metal oxide and a metal hydroxide, and said film containing F bonded to the metal of the metal component, said film containing no Cr,
- said one or both of said metal oxide and metal hydroxide comprising 50 atom % or more of all atoms in said film after subtracting all said F atoms from said film, and F content in said film is from 1 atom % to less than 60 atom % based on all atoms in said film;
- and
- at least a part of the metal component of said film has both a chemical bond to O and a chemical bond to F.
Dependencies are inferred from the claim text.