Method of producing surface-treated metal material and method of producing coated metal item
AssigneeChemetall GmbH
InventorsToshio Inbe, Hiroshi Kameda, Thomas Kolberg
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Abstract
A method of producing a surface-treated metal material, comprising: surface treating a metal material using a treatment liquid (1), which comprises from 10 to 10,000 ppm of tin ions and has a pH of 1.0 or greater, and subjecting the metal material that has undergone surface treatment with the treatment liquid (1) to an additional chemical conversion treatment using a treatment liquid (2), which comprises zirconium ions and/or titanium ions.
Claims12
A method of producing a surface-treated metal material, comprising:
- surface treating a metal material using a treatment liquid (1), which comprises from 10 to 10,000 ppm of tin ions and has a pH of 1.0 or greater, to form a first layer;
- and
- subjecting the metal material that has undergone surface treatment with the treatment liquid (1) to an additional chemical conversion treatment using a treatment liquid (2), which comprises tin ions and further comprises zirconium ions and/or titanium ions,
- wherein the chemical conversion treatment using treatment liquid (2) forms a uniform metal oxide film.
A method of producing a coated metal item, comprising:
- surface treating a metal material using a treatment liquid (1), which comprises from 10 to 10,000 ppm of tin ions and has a pH of 1.0 or greater, to form a first layer;
- subjecting the metal material that has undergone surface treatment with the treatment liquid (1) to an additional chemical conversion treatment using a treatment liquid (2), which comprises tin ions and further comprises zirconium ions and/or titanium ions, to form a metal oxide film of uniform thickness;
- and
- forming on the metal material that has undergone chemical conversion treatment with the treatment liquid (2) a coating film by cationic electrodeposition coating.
A method of producing a surface-treated metal material, comprising:
- surface treating a metal material using a treatment liquid (1), which comprises from 10 to 10,000 ppm of tin ions and has a pH of 1.0 or greater;
- and
- subjecting the metal material that has undergone surface treatment with the treatment liquid (1) to an additional chemical conversion treatment using a treatment liquid (2), which comprises tin ions and further comprises from 10 to 10,000 ppm of zirconium ions and/or titanium ions to form a uniform metal oxide layer, and
- wherein a ratio of the tin ion concentration within the treatment liquid (1) relative to the concentration of the zirconium and/or titanium ions within the treatment liquid (2) is within a range of from 0.005 to 1.
A method of producing a coated metal item, comprising:
- surface treating a metal material using a treatment liquid (1), which comprises from 10 to 10,000 ppm of tin ions and has a pH of 1.0 or greater;
- subjecting the metal material that has undergone surface treatment with the treatment liquid (1) to an electrolytic treatment using:
- a treatment liquid (2), which comprises tin ions and further comprises zirconium ions and/or titanium ions, and
- the metal material as a cathode;
- and
- forming on the metal material that has undergone chemical conversion treatment with the treatment liquid (2) a coating film by cationic electrodeposition coating.
Dependencies are inferred from the claim text.