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Method for controlling tinning plate surface dark grey degree

A technology of tin-plated plate and tin-plated substrate, applied in the field of metal processing

Active Publication Date: 2017-04-26
SHOUGANG JINGTANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, there is the technical problem of how to control the black ash degree on the surface of the tinplate in the prior art

Method used

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  • Method for controlling tinning plate surface dark grey degree
  • Method for controlling tinning plate surface dark grey degree
  • Method for controlling tinning plate surface dark grey degree

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Embodiment Construction

[0021] The embodiment of the present invention provides a method for controlling the soot level on the surface of the tinplate, which is used to reduce the soot level on the surface of the tinplate.

[0022] In order to solve the above technical problems, in the technical scheme of the embodiment of the present invention, the current density is 0.5As / dm 2 The passivation current is used to passivate the tin-plated substrate with a roughness greater than 0.4 μm, and then apply anti-rust oil to the surface of the passivated tin-plated substrate to finally obtain a tin-plated plate. By adopting the technical solution in the embodiment of the present invention, the technical effect of controlling the black and gray degree on the surface of the tinplate can be realized.

[0023] The technical solutions of the present invention will be described in detail below through the drawings and specific examples. It should be understood that the embodiments of the present application and the...

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Abstract

The invention relates to the field of metal machining, in particular to a method for controlling the tinning plate surface dark grey degree. The method for controlling the tinning plate surface dark grey degree includes the steps that a tinning base plate is passivated in a passivation device; the passivation electric current density is 0.5 As / dm<2>, and roughness of the tinning base plate is larger than 0.4 microns; the passivated tinning base plate surface is coated with anti-rust oil, and the tinning plate is obtained. The method is used for lowering the dark gray degree on the surface of the tinning plate.

Description

technical field [0001] The invention relates to the field of metal processing, in particular to a method for controlling the black ash level on the surface of a tinplate. Background technique [0002] Tin plate is a product obtained by plating pure tin on both sides of cold-rolled low-carbon thin plate. Tin plate has the characteristics of high strength, good formability, excellent corrosion resistance, and bright appearance. [0003] Black ash defect is one of the important defects on the surface of tinplate, which not only affects the corrosion resistance and aesthetics, but also seriously affects the bonding force between the tin layer and the passivation film, and between the passivation film and the coating. In particular, when the degree of soot is severe, pitting corrosion will be induced after the paint is covered. [0004] Therefore, the prior art has the technical problem of how to control the degree of black ash on the surface of the tinplate. Contents of the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/34
CPCC25D11/34
Inventor 王振文李永新孙宇王爱红周保欣朱防修万一群张旭明
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD