Steel sheet for containers and manufacturing method for same

Patent metadata

Field	Value
Publication number	US-9637826-B2
Application number	US-201113823409-A
Country	US
Kind code	B2
Filing date	Sep 14, 2011
Priority date	Sep 15, 2010
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

A steel sheet for containers that has excellent film adhesion qualities, and has; a chemical conversion coating formed by immersing or subjecting to electrolytic treatment a steel sheet in a solution containing Zr ions, F ions, with adhesion amount of 0.1 to 100 mg/m 2 for metal Zr and no more than 0.1 mg/m 2 for F; and a hydroxyl acid treatment layer formed on the chemical conversion coating, the layer having a C adhesion amount of 0.05 to 50 mg/m 2 .

First claim

The invention claimed is:

1. A steel sheet for containers providing highly-formed film adhesiveness, having:
a chemical conversion coating which is formed by immersing or electrolytically treating a steel sheet in a solution containing Zr ions, F ions and P ions, the adhesion amount of which is within a range of 4 mg/m 2 to 83 mg/m 2 as an amount of metal Zr and 0.01 mg/m 2 or less as an amount of F and 1 mg/m 2 to 45 mg/m 2 as an amount of P; and
a glycolic acid-treated layer which is formed on the chemical conversion coating, and the adhesion amount of which is within a range of 3 mg/m 2 to 45 mg/m 2 as an amount of C.

2. The steel sheet for containers providing highly-formed film adhesiveness according to claim 1 ,
wherein the steel sheet is a surface-treated steel sheet having a surface treatment layer which contains 5 mg/m 2 to 1,000 mg/m 2 of Ni or 100 mg/m 2 to 15,000 mg/m 2 of Sn, on at least one surface thereof.

3. The steel sheet for containers providing highly-formed film adhesiveness according to claim 1 ,
wherein the steel sheet is a surface-treated steel sheet having an underlying Ni layer which is a Ni plating layer or an Fe—Ni alloy plating layer and contains 5 mg/m 2 to 150 mg/m 2 of Ni, the underlying Ni layer having thereon formed 300 mg/m 2 to 3,000 mg/m 2 of a Sn plating layer, a part or the entirety of the underlying Ni layer being alloyed with a part of the Sn plating layer by a tin melting treatment to form an intermediate layer formed from a single layer of a Sn—Ni alloy layer or an Fe—Sn—Ni alloy layer, or an intermediate layer formed from a composite layer of a Ni layer as the lowest layer and a Sn—Ni alloy layer formed on an upper surface of the lowest layer, or an intermediate layer formed from a composite layer of an Fe—Ni layer as the lowest layer and an Fe—Sn—Ni alloy layer formed on the upper surface of the lowest layer, the surface-treated steel sheet further comprising on an upper surface of the intermediate layer a Sn island plating layer formed from a remainder of a Sn plating layer which is not alloyed.

4. The steel sheet for containers providing highly-formed film adhesiveness according to claim 2 ,
wherein the steel sheet is a surface-treated steel sheet having an underlying Ni layer which is a Ni plating layer or an Fe—Ni alloy plating layer and contains 5 mg/m 2 to 150 mg/m 2 of Ni, the underlying Ni layer having thereon formed 300 mg/m 2 to 3,000 mg/m 2 of a Sn plating layer, a part or the entirety of the underlying Ni layer being alloyed with a part of the Sn plating layer by a tin melting treatment to form an intermediate layer formed from a single layer of a Sn—Ni alloy layer or an Fe—Sn—Ni alloy layer, or an intermediate layer formed from a composite layer of a Ni layer as the lowest layer and a Sn—Ni alloy layer formed on an upper surface of the lowest layer, or an intermediate layer formed from a composite layer of an Fe—Ni layer as the lowest layer and an Fe—Sn—Ni alloy layer formed on the upper surface of the lowest layer, the surface-treated steel sheet further comprising on an upper surface of the intermediate layer a Sn island plating layer formed from a remainder of a Sn plating layer which is not alloyed.

5. A method of manufacturing a steel sheet for containers providing highly-formed film adhesiveness according to claim 1 , the method comprising:
immersing or electrolytically treating the steel sheet in the solution containing Zr ions, F ions and P ions to form the chemical conversion coating on the steel sheet, and
immersing the steel sheet having the chemical conversion coating in the glycolic acid-containing aqueous solution, or applying the glycolic acid-containing aqueous solution onto the chemical conversion coating, and drying the resultant steel sheet.

6. The method of manufacturing a steed sheet for containers providing highly-formed film adhesiveness according to claim 5 , wherein the temperature of the drying step is 70° C. or higher.

7. The method of manufacturing a steel sheet for containers providing highly-formed film adhesiveness according to claim 5 ,
wherein after the drying step, the steel sheet is washed with water having a temperature of 80° C. or higher and is further dried.

8. The method of manufacturing a steel sheet for containers providing highly-formed film adhesiveness according to claim 5 , wherein the steel sheet is a surface-treated steel sheet having a surface treatment layer which contains 5 mg/m 2 to 1,000 mg/m 2 of Ni or 100 mg/m 2 to 15,000 mg/m 2 of Sn, on at least one surface thereof.

9. The method of manufacturing a steel sheet for containers providing highly-formed film adhesiveness according to claim 5 ,
wherein the steel sheet is a surface-treated steel sheet having an underlying Ni layer which is a Ni plating layer or an Fe—Ni alloy plating layer and contains 5 mg/m 2 to 150 mg/m 2 of Ni, and a Sn island plating layer which is a remainder of a Sn plating layer and is not alloyed, the Sn island plating layer being formed by plating 300 mg/m 2 to 3,000 mg/m 2 of Sn on the underlying Ni layer, and alloying a part or the entirety of the underlying Ni layer and a part of the Sn plating layer by performing a tin melting treatment.

Assignees

• Suzuki Takeshi
• Nakamura Norihiko
• Miyamoto Yuka
• Tobiyama Yoichi
• Jfe Steel Corp

Inventors

• Suzuki Takeshi
• Nakamura Norihiko
• Miyamoto Yuka
• Tobiyama Yoichi

Classifications

• Y10T428/24967

  Absolute thicknesses specified · CPC title

• B32B15/18

  comprising iron or steel {(B32B15/011, B32B15/012 and B32B15/013 take precedence)} · CPC title

• Y10T428/12618

  Plural oxides · CPC title

• C23C22/05

  using aqueous solutions · CPC title

• Y10T428/12597

  Noncrystalline silica or noncrystalline plural-oxide component [e.g., glass, etc.] · CPC title