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Steel strip tinning method

A technology of strip steel and tin plating, which is applied in the field of surface treatment of metal materials, can solve the problems of uneven coating thickness, uneven and smooth surface of tin layer, unsuitable surface for coating and printing, etc., and achieve the effect of uniform thickness

Inactive Publication Date: 2015-04-29
张家港市新港星科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the tin plate in the market has more or less the following disadvantages: the thickness of the coating is not uniform, the surface of the tin layer is uneven and smooth, and there are defects such as defects, dents, wrinkles, and rust spots that are not conducive to use, making its surface Not suitable for coating and printing

Method used

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  • Steel strip tinning method
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0050] Original board

[0051] 1) Specifications

[0052]

[0053] 2) Mechanical properties:

[0054] Tensile strength: 451N / mm 2 ;

[0055] Yield limit: 294N / mm 2 ;

[0056] 3) Hardness value:

[0057]

[0058] 4) Surface condition of the original board: The surface of the original board should be clean and rust-free, and the oil should be evenly coated. The amount of oil applied is 30-70mg / ㎡ (double-sided). Generally, stone-grained, pitted, and shiny surfaces are used.

[0059] 5) Dimensional tolerance: the maximum thickness tolerance of a steel plate shall not exceed ±8.5%, and the target value ≤±4%; the maximum difference of the same plate shall not exceed 4%, and the target value ≤2%; width tolerance +3, -0.

[0060] 6) Others: The coiling state of the original board should be neat and tight, and tower-shaped, heart-shaped, etc. are not allowed. The board shape is good. There are side waves or middle waves over 3mm, or although there are side waves or middle waves less than 3mm, the...

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Abstract

The invention discloses a steel strip tinning method which comprises the following steps: 1) pretreatment; 2) electrotinning; 3) 1# baking; 4) soft melting; 5) passivating treatment; 6) 2# baking; and 7) oil application. The tinned plate obtained by the continuous tinning method has uniform thickness; the tin coating is uniform and smooth on the whole surface and does not have flaws, dents, wrinkles, rusty stains and other defects unsuitable for use; and under normal storage and use conditions, the whole surface is suitable for paints and printing.

Description

Technical field [0001] The invention belongs to the technical field of surface treatment of metal materials, and specifically relates to a method for tinning strip steel. Background technique [0002] The tin plate has good corrosion resistance, certain strength and hardness, good formability and easy soldering, the tin layer is non-toxic and tasteless, can prevent iron from dissolving into the packaging, and the surface is bright, and the printed pictures can beautify the product. Mainly used in the food canning industry, and secondarily used in packaging materials such as chemical paints, oils, and medicines. Tin plate is divided into hot tin plate and electroplated tin plate according to the production process. Statistics of tin plate output must be calculated based on the weight after plating. [0003] The tin plate in the current market has more or less the following shortcomings: the thickness of the coating is uneven, the surface of the tin layer is uneven and smooth, ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D7/06
Inventor 徐文龙徐向东徐斌
Owner 张家港市新港星科技有限公司
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