Nickel-clad copper strip and preparation method thereof

A nickel-plated copper and pure copper technology, applied in the field of battery manufacturing, can solve the problems of easy blackening and discoloration of the surface of nickel-plated copper strips, high waste water treatment costs, high metal concentration, etc., to achieve high efficiency, low carry-out loss, and low metal concentration low effect

Inactive Publication Date: 2020-01-21
江阴鸿顺新电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The passivation of traditional nickel-plated copper strips uses electroplating hexavalent chromium or other passivation processes. The surface of nickel-plated copper strips produced by such processes is prone to blackening and discoloration; The metal concentration is high, the carryover loss is large, the cost of wastewater treatment is extremely high, and it is easy to pollute the environment

Method used

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  • Nickel-clad copper strip and preparation method thereof
  • Nickel-clad copper strip and preparation method thereof

Examples

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Effect test

Embodiment 1

[0047] A preparation process for a nickel-plated copper strip, comprising the following steps:

[0048] Step S1, electroplating the pure copper substrate with an electroplating solution to form a metal coating on the pure copper substrate, the metal coating sequentially includes an electroplating semi-gloss nickel layer and an electroplating chromium layer.

[0049] Before electroplating, the following pretreatments are carried out:

[0050] Step S11, chemical degreasing: put the pure copper substrate into a solution containing 50 g / L of sodium hydroxide for 5 s, and the chemical degreasing temperature is 40°C.

[0051]Step S111, washing with water, spraying water on the pure copper substrate after chemical degreasing to prevent contamination of the bath solution in the next step.

[0052] Step S12, activation: the pure copper substrate after chemical degreasing is placed in a sulfuric acid solution with a volume fraction of 8%, and activated for 5s at an activation temperatu...

Embodiment 2

[0064] A preparation process for a nickel-plated copper strip, comprising the following steps:

[0065] Step S1, electroplating the pure copper substrate with an electroplating solution to form a metal coating on the pure copper substrate, the metal coating sequentially includes an electroplating semi-gloss nickel layer and an electroplating chromium layer.

[0066] Before electroplating, the following pretreatments are carried out:

[0067] Step S11, chemical degreasing: put the pure copper substrate into a solution containing 50 g / L of sodium hydroxide for 7 seconds, and the chemical degreasing temperature is 45°C.

[0068] Step S111, washing with water, spraying water on the pure copper substrate after chemical degreasing to prevent contamination of the bath solution in the next step.

[0069] Step S12, activation: the pure copper substrate after chemical degreasing was placed in a sulfuric acid solution with a volume fraction of 10%, and activated for 7s at an activation ...

Embodiment 3

[0081] A preparation process for a nickel-plated copper strip, comprising the following steps:

[0082] Step S1, electroplating the pure copper substrate with an electroplating solution to form a metal coating on the pure copper substrate, the metal coating sequentially includes an electroplating semi-gloss nickel layer and an electroplating chromium layer.

[0083] Before electroplating, the following pretreatments are carried out:

[0084] Step S11, chemical degreasing: put the pure copper substrate into a solution containing 50 g / L of sodium hydroxide for 8 seconds, and the chemical degreasing temperature is 45°C.

[0085] Step S111, washing with water, spraying water on the pure copper substrate after chemical degreasing to prevent contamination of the bath solution in the next step.

[0086] Step S12, activation: the pure copper substrate after chemical degreasing was placed in a sulfuric acid solution with a volume fraction of 10%, and activated for 8 seconds at an acti...

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Abstract

The invention discloses a nickel-clad copper strip and a preparation method thereof. According to the nickel-clad copper strip, a pure copper substrate is taken as the basis, and the pure copper substrate is provided with an electroplated semi-bright nickel layer and an electroplated chrome layer in sequence from inside to outside; the electroplated semi-bright nickel layer is 1-3 mum thick; and the electroplated chrome layer is 0.03-0.05 mum thick. The preparation method for the nickel-clad copper strip has a simple process flow; during passivating, a trivalent chrome plating process is employed instead of other passivating processes, so that the nickel-clad copper strip has higher covering ability and high corrosion resistance and is low in metal concentration and small in carryover loss; the cost of wastewater treatment can be greatly reduced; the use current density is low; and the trivalent chrome plating process is higher than a rack plating process in efficiency. The nickel-cladcopper strip prepared by the preparation method has very good surface evenness and brightness and a good wear-resisting property and anti-corrosion property, and the surface of the nickel-clad copperstrip cannot turn black or change in color.

Description

technical field [0001] The invention relates to the technical field of battery manufacturing, in particular to a nickel-plated copper strip and a preparation method thereof. Background technique [0002] The passivation of traditional nickel-plated copper strips uses electroplating hexavalent chromium or other passivation processes. The surface of nickel-plated copper strips produced by such processes is prone to blackening and discoloration; The metal concentration is high, the carryover loss is large, the cost of wastewater treatment is extremely high, and it is easy to cause pollution to the environment. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a nickel-plated copper strip with better corrosion resistance, good surface smoothness, good brightness, and not easy to blacken and discolor, and a preparation method thereof. [0004] A nickel-plated copper strip according to the prese...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C25D7/06C25D5/14C25D5/34C25D3/12C25D3/06
CPCC25D3/06C25D3/12C25D5/14C25D5/34C25D7/0614
Inventor陈小平
Owner江阴鸿顺新电子科技有限公司