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Zn-ni electroplated steel sheet having excellent corrosion resistance and formability and manufacturing method therefor

A technology with excellent processability and corrosion resistance, applied in the plating of superimposed layers, chemical instruments and methods, transportation and packaging, etc., can solve the problem of low actual utilization rate, minimize the reduction of physical properties, and achieve corrosion resistance. The effect of excellent performance and processability, and excellent price competitiveness

Active Publication Date: 2019-08-09
浦项股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, according to the research on the influence of residual stress based on the degree of nickel alloying, the residual stress characteristics based on the corrosion environment of the manufactured test piece, that is, the residual stress caused by the penetration of corrosion products into the interior of the coating based on the degree of surface crack generation, cannot be reflected. The degree of stress variation, the actual utilization rate is lower

Method used

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  • Zn-ni electroplated steel sheet having excellent corrosion resistance and formability and manufacturing method therefor
  • Zn-ni electroplated steel sheet having excellent corrosion resistance and formability and manufacturing method therefor

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Embodiment Construction

[0029] Embodiments of the present invention are described in detail below. However, the present invention is not limited to the following examples.

[0030] (Example)

[0031] After degreasing and pickling the base steel plate (ultra-low carbon steel) with a thickness of 0.8 mm, a width of 140 mm, and a vertical size of 250 mm, electroplating and heat treatment are carried out according to the conditions recorded in Table 1, so as to be coated on the base steel plate. A Zn-Ni coating is formed. Wherein, after the substrate steel plate is disposed on the cathode of the electroplating simulator of the vertical plating unit type, the plating solution is circulated to form a Zn-Ni coating on one side, and then the same method is used to form a Zn-Ni coating on the other side. Coating, so that the amount of coating on both sides of the base steel plate is different. When forming the coating, the current density is 100A / dm 2 , the flow velocity is 1.5m / s, and the sulfuric acid s...

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Abstract

The present invention relates to a Zn-Ni electroplated steel sheet having excellent corrosion resistance and formability and a manufacturing method therefor. One embodiment of the present invention provides a Zn-Ni electroplated steel sheet comprising: a base steel sheet; and a Zn-Ni plated layer formed on the base steel sheet, wherein a Ni alloying degree within the Zn-Ni plated layer is 7.5-14%,and the Ni amount is 40-50 atom% in a region within 1 [mu]m toward the Zn-Ni plated layer from an interface of the base steel sheet and the Zn-Ni plated layer. According to the present invention, provided is a Zn-Ni electroplated steel sheet, which has superior corrosion resistance and formability despite having a relatively low nickel alloying degree, has excellent price competitiveness comparedwith that of a conventional Zn-Ni plated steel sheet and two-layer plated steel sheet, and can ensure high productivity.

Description

technical field [0001] The present invention relates to a Zn-Ni electroplated steel sheet excellent in corrosion resistance and workability and a manufacturing method thereof. Background technique [0002] The Zn-Ni plated steel sheet has an excellent corrosion resistance compared with a pure galvanized steel sheet by introducing nickel, an electrochemically stable element. However, in general, Zn-Ni coated steel sheets produced by electroplating process have higher residual stress than zinc and nickel base metals (Parents metals) due to lower process temperature. Moreover, when the nickel content in the coating is increased in order to improve corrosion resistance, the residual stress will increase sharply and cracks will occur in the coating, the hardness of the coating will increase and the workability will deteriorate, and the potential difference between the base iron and the Zn-Ni coating will decrease and the corrosion protection will be sacrificed. Sexual deteriorat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56C25D5/50C25D7/06C22C18/00
CPCC22C18/00C25D5/50C25D3/565C25D7/0614C25D5/36B32B15/18C23C28/023C22C30/06C23C30/005C23C28/021C23C28/025C23C30/00C22C19/03B32B15/04B32B15/015C23C28/3225B32B15/01B32B15/043B32B15/013Y10T428/12937Y10T428/12951Y10T428/12972Y10T428/24967Y10T428/12792Y10T428/12799Y10T428/2495Y10T428/12931Y10T428/27Y10T428/12944
Inventor 权纹栽姜春镐金洙永
Owner 浦项股份有限公司
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