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Nickel-plated steel strip and preparation method thereof

A technology of nickel-plated steel and cold-rolled steel strip, applied in chemical instruments and methods, layered products, metal layered products, etc., can solve problems such as affecting corrosion resistance and welding performance, changing material resistance, etc. and welding performance improvement, bonding force enhancement, corrosion resistance improvement effect

Inactive Publication Date: 2013-10-09
深圳市中金高能电池材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional nickel-plated steel strip is only coated with a layer of nickel on the steel base strip, and nickel is prone to form surface oxide film after long-term exposure in the air. This film not only changes the resistance of the material, but also affects its corrosion resistance. and welding performance

Method used

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  • Nickel-plated steel strip and preparation method thereof
  • Nickel-plated steel strip and preparation method thereof
  • Nickel-plated steel strip and preparation method thereof

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preparation example Construction

[0025] The present invention also discloses the preparation method of the above-mentioned nickel-plated steel strip, which comprises the following steps:

[0026] 1. Preprocessing steps

[0027] Pretreatment is carried out on the original steel base strip to be plated. The pretreatment mainly includes the following treatments in sequence: chemical degreasing, electrolytic degreasing, hot water washing, immersion activation in sulfuric acid or hydrochloric acid solution, and pure water washing. Among them, the control parameters of the above steps are as follows:

[0028] 1. Chemical degreasing

[0029] The degreasing fluid includes the following components: NaOH 60±5 g / L, NaOH 2 CO 3 30±5g / L and Na 3 PO 4 40±5g / L;

[0030] Temperature: 65±5℃;

[0031] 2. Electrodegreasing

[0032] The degreasing fluid includes the following components: NaOH 45±5 g / L, NaOH 3 PO 4 30±5g / L;

[0033] Electrolytic oil temperature: 65±5℃;

[0034] Current density: 5-10 A / dm 2 ;

[...

Embodiment

[0077] 1. Select SPCE with a thickness of 0.25mm as the steel base belt.

[0078] In order to make the bonding force between the steel base strip and the coating stronger, the original steel base strip to be plated should be pretreated, including chemical degreasing, electrolytic degreasing, hot water washing, immersion activation in a solution containing sulfuric acid, and after washing with pure water. Enter the electroplating operation. Wherein the control parameters of the above steps are as follows:

[0079] Chemical degreasing fluid composition: NaOH 60 g / L, NaOH 2 CO 3 30 g / L, Na 3 PO 4 40g / L;

[0080] Chemical degreasing fluid temperature: 65±5℃;

[0081] Chemical degreasing time: 3~5 min;

[0082] Electrolytic degreasing fluid composition: NaOH 45 g / L, NaOH 3 PO 4 30g / L;

[0083] Electrolytic oil temperature: 65±5℃;

[0084] Electrolytic degreasing time: 3~5 min;

[0085] Current density: 5-10 A / dm 2 ;

[0086] Hot water washing temperature: around 6...

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Abstract

The invention relates to a nickel-plated steel strip and a preparation method thereof. The nickel-plated steel strip comprises a steel base strip, wherein a first iron-nickel binding layer, a dark nickel layer and a semi-bright nickel layer are orderly electroplated at two sides of the steel base strip from inside to outside; an electroplating process of the iron-nickel binding layer and the semi-bright nickel layer is a pulse electroplating process; the electroplating process of the dark nickel layer is a direct-current electroplating process. The preparation method comprises the following steps: pretreatment; electroplating, namely electroplating a layer of ultra-thin nickel-plated layer at the outer surface of the steel base strip which is preprocessed by the pulse electroplating process as the iron-nickel binding layer, electroplating a layer of dark nickel layer at the outer surface of the ultra-thin nickel-plated layer by adopting the direct-current electroplating process, and electroplating a layer of semi-bright nickel layer at the outer surface of the dark nickel layer by using the pulse electroplating process; post-treatment, namely cleaning and drying the electroplated nickel-plated steel strip, and finally carrying out thermal treatment. Three layers of different clad layers are formed at the surface of the steel base strip by the electroplating process, so that the binding force of the coating and the steel base strip is enhanced; the performances such as corrosion resistance, soldering resistance and the like are obviously improved.

Description

technical field [0001] The invention relates to the technical field of steel strip products, in particular to a nickel-plated steel strip and a preparation method thereof. Background technique [0002] At present, the electrolytes of nickel-cadmium batteries and alkaline-manganese batteries mainly use strong alkaline substances such as potassium hydroxide. Therefore, the materials for making batteries need to have strong corrosion resistance, and metal nickel happens to have excellent alkali corrosion resistance. In addition, metal nickel has good welding performance, so that the connection between each part of the battery can be realized by welding. [0003] The traditional nickel-plated steel strip is only coated with a layer of nickel on the steel base strip, and nickel is prone to form surface oxide film after long-term exposure in the air. This film not only changes the resistance of the material, but also affects its corrosion resistance. and welding properties. Con...

Claims

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Application Information

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IPC IPC(8): C25D5/14B32B15/01
Inventor 邓国梁李清湘王度根南春雷刘东林郭军强
Owner 深圳市中金高能电池材料有限公司
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