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Method for producing surface-treated steel sheet

A technology of surface-treated steel plate and manufacturing method, which is applied in the field of surface-treated steel plate manufacturing, can solve the problems of resin peeling of tank body, increase the manufacturing cost of tinplate, problems of resin processing adhesion, etc., and achieve excellent adhesion and excellent processing adhesion. Effect

Inactive Publication Date: 2014-08-20
TOYO KOHAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the treatment of the resin-coated copper-plated steel sheet in Patent Document 1 requires additional new treatment. In addition to increasing the manufacturing cost of the tinplate, if the stretching process is performed, the stretching process and the punching process are combined to perform the can body. During the forming process, the resin may peel off from the upper part of the tank body during the forming process, and there is a problem with the processing adhesiveness of the resin during the process of the tank body

Method used

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  • Method for producing surface-treated steel sheet
  • Method for producing surface-treated steel sheet
  • Method for producing surface-treated steel sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110] [Production of surface-treated steel sheets]

[0111] Sulfuric acid tin plating composition

[0112] Tin sulfate concentration (i.e. Sn concentration): 50g / L

[0113] Plating conditions

[0114] Plating current density: 5A / dm 2 ,

[0115] Plating bath temperature: 40°C,

[0116] Tin plating amount: 2.8

[0117] [Manufacturing of resin-coated steel sheets]

[0118] Next, a transparent non-stretched film of ethylene terephthalate-ethylene isophthalate copolymer (PETI) with a thickness of 28 μm was laminated on one side of the above-mentioned surface-treated steel sheet (the side inside the tank), and at the same time On the other side (the side outside the tank), laminate ethylene terephthalate-ethylene isophthalate copolymer (PETI) at a bonding temperature of 230°C. White pigment containing 20% ​​by mass of titanium is white and the thickness is 16 μm. The white non-extended film of the resin film is cooled immediately after the resin film lamination is completed,...

Embodiment 2

[0120][Production of surface-treated steel sheets]

[0121] Sulfuric acid tin plating composition

[0122] Tin sulfate concentration (i.e. Sn concentration): 70g / L

[0123] Plating conditions

[0124] Plating current density: 7A / dm 2 ,

[0125] Plating bath temperature: 40°C,

[0126] Tin plating amount: 2.8

[0127] [Manufacturing of resin-coated steel sheets]

[0128] Carry out the same way as Example 1.

Embodiment 3

[0130] [Production of surface-treated steel sheets]

[0131] Sulfuric acid tin plating composition

[0132] Tin sulfate concentration (i.e. Sn concentration): 90g / L

[0133] Plating conditions

[0134] Electroplating current density: 10A / dm 2 ,

[0135] Plating bath temperature: 40°C,

[0136] Tin plating amount: 2.8

[0137] [Manufacturing of resin-coated steel sheets]

[0138] Carry out the same way as Example 1.

[0139]

[0140] Evaluations on the surface-treated steel sheets of Examples 1 to 3 will be described below.

[0141] [surface observation]

[0142] figure 1 (a) shows the embodiment 1 of the present invention, the surface observation photo (SEM image) of the surface treated steel plate in which the exposed tin on the iron surface is deposited on the surface of the steel plate,

[0143] figure 1 (b) is a surface observation photograph of the surface-treated steel sheet of Comparative Example 1.

[0144] Such as figure 1 Shown in (a), on the surface-t...

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Abstract

Provided is a method for manufacturing a surface treated steel sheet for a resin coated steel sheet having excellent working adhesiveness even at the time of rigorous forming working. In a method for manufacturing a surface-treated steel sheet, an area ratio of tin covering a surface of a steel sheet is set to 5% to 95% by adjusting the Sn concentration in a tin sulfate plating bath containing a sulfuric acid and tin sulfate to a value which falls within a range of 30 to 120 g / L, a temperature of the tin sulfate plating bath is set to a value which falls within a range of 20 to 60°C, and current density in tin sulfate plating to a value which falls within a range of 2 to 50 A / dm 2 , whereby the surface of the steel sheet is coated with metallic tin such that some of iron on the surface of the steel sheet is exposed.

Description

technical field [0001] The present invention relates to a method of manufacturing a surface-treated steel sheet for resin-coated steel sheets excellent in processing adhesion. Background technique [0002] In recent years, resin-coated steel sheets have been stretched first or stretched after stretching, punched after stretched, stretched and punched after stretching, etc. Strictly processed can body and tank bottom are integrally formed into the can body, and then the can lid is rolled and sealed to produce the can. In order for these cans to prevent the coating resin from peeling off or breaking during and after the severe forming process, the resin must have excellent adhesion to the steel plate. Therefore, as the material for these tank bodies, a resin-coated chromated steel sheet in which an organic resin is coated on a chromated steel sheet such as tin-free steel (TFS) with a chromated film excellent in processing adhesion formed on the surface is used. [0003] Howe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D5/26C25D3/30
CPCC25D3/30C25D5/02C25D5/36C25D5/505C25D7/0614
Inventor 松原政信
Owner TOYO KOHAN CO LTD
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