Surface-treated metal material

Patent metadata

Field	Value
Publication number	US-11965249-B2
Application number	US-202017437746-A
Country	US
Kind code	B2
Filing date	Mar 19, 2020
Priority date	Mar 19, 2019
Publication date	Apr 23, 2024
Grant date	Apr 23, 2024

Abstract

A surface-treated metal material includes a metal sheet, a plating layer formed on the metal sheet and containing aluminum, magnesium, and zinc, and a composite coating formed on a surface of the plating layer, the composite coating including an organic silicon compound, one or two of a zirconium compound and a titanium compound, a phosphoric acid compound, a fluorine compound, and a vanadium compound, wherein, when a surface of the composite coating is analyzed at a spot size of φ30 μm using micro-fluorescent X-rays, a maximum value of V/Zn, which is a mass ratio of a V content to a Zn content, is 0.010 to 0.100.

First claim

The invention claimed is:

1. A surface-treated metal material, comprising:
a metal sheet;
a plating layer formed on the metal sheet and containing aluminum, magnesium, and zinc; and
a composite coating formed on a surface of the plating layer, the composite coating including an organic silicon compound; a zirconium compound and/or a titanium compound; a phosphoric acid compound; a fluorine compound; and a vanadium compound,
wherein, when a surface of the composite coating is analyzed at a spot size of φ30 μm using micro-fluorescent X-rays, a maximum value of V/Zn, which is a mass ratio of a V content to a Zn content, is 0,010 to 0,100.

2. The surface-treated metal material according to claim 1 , wherein, in the composite coating, when analyzed with the micro-fluorescent X-rays at a spot size of φ30 μm, an area ratio of a region in which the V/Zn is 0.010 to 0.100 to an entire measurement range is 1% to 50%.

3. The surface-treated metal material according to claim 1 , wherein, in the composite coating, when analyzed with the micro-fluorescent X-rays at a spot size of φ30 μm, a maximum value of V/Si, which is a ratio of a solid content mass of V to a solid content mass of Si, is 1.0 to 100.

4. The surface-treated metal material according to claim 1 , wherein, in the composite coating, when analyzed with the micro-fluorescent X-rays at a spot size of φ2 mm,
an average value of (Zr+Ti)/Si, which is a ratio of a total solid content mass of Zr and/or Ti to a solid content mass of Si, is 0.06 to 0.15,
an average value of P/Si, which is a ratio of a solid content mass of P to the solid content mass of Si, is 0.15 to 0.25, and
an average value of V/Si is 0.01 to 0.10.

5. The surface-treated metal material according to claim 1 , wherein a chemical composition of the plating layer contains:
Al: more than 4.0% to less than 25.0%;
Mg: more than 1.0% to less than 12.5%;
Sn: 0% to 20%,
Bi: 0% to less than 5.0%;
In: 0% to less than 2.0%;
Ca: 0% to 3.0%;
Y: 0% to 0.5%;
La: 0% to less than 0.5%;
Ce: 0% to less than 0.5%:
Si: 0% to less than 2.5%;
Cr: 0% to less than 0.25%:
Ti: 0% to less than 0.25%;
Ni: 0% to less than 0.25%;
Co: 0% to less than 0.25%
V: 0% to less than 0.25%;
Nb: 0% to less than 0.25%;
Cu: 0% to less than 0.25%;
Mn: 0% to less than 0.25%:
Fe: 0% to 5.0%;
Sr: 0% to less than 0.5%;
Sb: 0% to less than 0.5%;
Pb: 0% to less than 0.5%; and
B: 0% to less than 0.5%,
with a remainder of Zn and impurities.

6. The surface-treated metal material according to claim 2 , wherein, in the composite coating, when analyzed with the micro-fluorescent X-rays at a spot size of φ30 μm, a maximum value of V/Si, which is a ratio of a solid content mass of V to a solid content mass of Si, is 1.0 to 100.

Assignees

• Nippon Steel Corp

Inventors

• Shoji Hiromasa
• Ishizuka Kiyokazu
• Tokuda Kohei
• Saito Mamoru
• Goto Yasuto
• Tokuda Ikumi

Classifications

• C23C28/34 Primary

  including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates · CPC title

• C22C18/04 Primary

  with aluminium as the next major constituent · CPC title

• C23C22/36

  containing also phosphates · CPC title

• Y10T428/12569

  Synthetic resin · CPC title

• Y10T428/12792

  Zn-base component · CPC title