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Sn-plated steel sheet and method for manufacturing sn-plated steel sheet

A manufacturing method and a steel plate technology, which are applied in the field of Sn-plated steel plate and Sn-plated steel plate manufacturing, can solve the problems of appearance yellowing, reduced coating film adhesion, and reduced sulfur blackening resistance, and achieve coating film adhesion and Excellent effect of sulfur blackening resistance

Active Publication Date: 2020-10-16
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for Sn-plated steel sheets without chromate coatings, as mentioned above, the increase in tin oxide causes yellowing of the appearance, lowers the adhesion of the coating film, and lowers the resistance to sulfide blackening.

Method used

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  • Sn-plated steel sheet and method for manufacturing sn-plated steel sheet
  • Sn-plated steel sheet and method for manufacturing sn-plated steel sheet
  • Sn-plated steel sheet and method for manufacturing sn-plated steel sheet

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099]

[0100] For the low-carbon cold-rolled steel sheet with a thickness of 0.2 mm (corresponding to steel sheet 1), as a pretreatment, electrolytic alkaline degreasing, water washing, dilute sulfuric acid immersion acid pickling, and water washing are carried out, followed by Sn electroplating using a phenol sulfonic acid bath, and then , Further carried out heating and melting treatment. The adhesion amount of Sn plating is equivalent to about 2.8g / m per side 2 It is a standard, but some test materials changed the adhesion amount of Sn plating by changing the energization time. In addition, test materials that were not heated and melted after Sn electroplating were also produced. The amount of Sn plating adhesion was determined by measurement using a fluorescent X-ray method (ZSX Primus manufactured by Rigaku Corporation).

[0101] The Sn-plated steel sheet produced as described above was subjected to cathodic electrolysis in an aqueous solution containing zirconium fluorid...

Embodiment 2

[0126] For low-carbon cold-rolled steel sheets with a thickness of 0.2mm, as pretreatments, electrolytic alkaline degreasing, water washing, dilute sulfuric acid immersion pickling, and water washing are carried out, followed by Sn electroplating using a phenol sulfonic acid bath, and then further heating and melting deal with. The adhesion amount of Sn is equivalent to 2.8g / m per side 2 .

[0127] The Sn-plated steel sheet produced as described above is subjected to cathodic electrolysis in an aqueous solution containing zirconium fluoride to form a zirconium oxide layer on the Sn-plated steel sheet. The concentration of zirconium in the catholyte was set to 1400 ppm. In addition, the bath temperature of the catholyte is set to 35°C, and the pH of the catholyte is adjusted to 3 or more and 5 or less, and the current density and cathodic electrolysis time are appropriately adjusted so that the amount of Zr deposited is 5 mg / m 2 .

[0128] In addition, the Sn-plated steel sheet on...

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Abstract

This Sn-plated steel sheet is provided with: a base material plated steel sheet which has a steel sheet and a Sn-plated layer disposed on at least one surface of the steel sheet; and a coating layer which is disposed on the base material plated steel sheet and which comprises zirconium oxide and tin oxide. In this Sn-plated steel sheet, the deposition amount of Sn in one surface thereof is 0.1-15g / m<2>, the amount of the zirconium oxide contained in the coating layer falls within a range of 1-30 mg / m<2> in terms of the amount of metallic zirconium, the peak position of binding energy of Sn3d5 / 2 as measured by X-ray photoelectron spectroscopy with respect to the tin oxide in the coating layer falls within a range of not less than 1.4 eV but less than 1.6 eV with respect to the peak position of binding energy of metallic Sn, and the amount of electricity required for reduction of the tin oxide falls within a range of more than 5.0 mC / cm<2> but not more than 20 mC / cm<2>.

Description

Technical field [0001] The invention relates to a Sn-plated steel sheet and a method for manufacturing the Sn-plated steel sheet. [0002] This application claims priority based on Japanese Patent Application No. 2018-036587 filed in Japan on March 1, 2018, and uses the content here. Background technique [0003] Tinned (Sn) steel sheets are widely known as "tinplate" and are widely used in can applications such as beverage cans and food cans and other applications. This is because Sn is safe for the human body and is a beautiful metal. The Sn-plated steel sheet is mainly manufactured by the electroplating method. This is because the electroplating method is more advantageous than the hot-dip plating method in order to control the amount of Sn, which is a relatively expensive metal, to the minimum required amount. Most of the Sn-plated steel sheets are provided with beautiful metallic luster by heating and melting treatment after plating, and then chromate treatment such as elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/00C25D9/08
CPCC25D9/08C23C28/30C23C28/32C23C28/321C23C28/322C23C28/345C23C28/3455C25D9/00C25D3/30C25D5/505C25D5/36C23C22/34C25D5/48C25D5/50C25D9/10Y10T428/12583C23C22/361B32B15/043Y10T428/12611Y10T428/1259C23C22/05Y10T428/12951Y10T428/12722C23C28/34C23C30/005Y10T428/12979Y10T428/12708B32B15/04C23C22/36B32B15/18Y10T428/12667Y10T428/12618C23C30/00Y10T428/12972
Inventor 山中晋太郎野田正和佐藤恭彦仲宗根信夫
Owner NIPPON STEEL CORP