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Nickel plating method of steel belts for steel battery shells

A battery steel shell and steel strip technology, applied in jewelry and other directions, can solve the problems of increased industrial electricity and labor costs, no environmental protection measures for electroplating treatment, uneven coating of battery steel shells, etc., so as to increase material costs and labor costs. , Enhance corrosion resistance, good bonding effect

Inactive Publication Date: 2015-12-23
HUNAN TOYO LEED MATERIAL SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The battery steel case processed by this method has uneven coating, poor shell protection performance, low price, and no corresponding electroplating treatment environmental protection measures
At present, there are also disclosed nickel-plating methods for steel strips in China, but in the process of electroplating, the nickel-plating methods are all carried out by a single nickel-plating method. The phenomenon of nickel, so the nickel-plated battery steel case produced by the existing method is difficult to meet the product requirements of different customers
In addition, due to the low production efficiency of the existing method (generally within 5 m / s), the cost of industrial electricity and labor is greatly increased, resulting in high product costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: The thickness of the steel strip is 0.25mm, and the width is 987mm.

[0042] (1) Unwind the steel belt buffer pit.

[0043] (2) Then use 55g / LNaOH, 25g / LNa 2 CO 3 , 35g / LNa 3 PO 4 , 0.5mol / L detergent solution at 63 ℃ to degrease the steel strip; then use 40g / LNaOH, 25g / LNa 2 CO 3 , 25g / LNa 3 PO 4 solution, at a current density of 5.0A / dm 2 , Electrochemical degreasing of the steel strip was carried out at a temperature of 63°C.

[0044] (3) After degreasing, wash with circulating water first, then activate with 40g / L analytically pure hydrochloric acid solution at room temperature, and then use pure water for circulating washing after activation.

[0045] (4) Pre-nickel plating, recovery: Pre-nickel plating once, pre-nickel plating at 150g / LNi 2 SO 4 , 25g / LNiCl 2 , 35g / LH 3 BO 3 solution with a current density of 1.5A / dm 2 , the pH value is 1.8, the temperature is 38°C, and the Baume degree is 14.

[0046] (5) Dark nickel plating, recover...

Embodiment 2

[0052] Embodiment 2: The thickness of the steel strip is 0.25mm, and the width is 987mm.

[0053] (1) Unwind the steel belt buffer pit.

[0054] (2) Then use 50g / LNaOH, 20g / LNa 2 CO 3 , 30g / LNa 3 PO 4 , 0.5mol / L detergent solution to degrease the steel strip at a temperature of 60°C; then use 35g / LNaOH, 20g / LNa 2 CO 3 , 20g / LNa 3 PO 4 solution, at a current density of 3.0A / dm 2 , Electrochemical degreasing of the steel strip at a temperature of 60°C.

[0055] (3) After degreasing, first use circulating water washing, then use 30g / L analytical pure hydrochloric acid solution to activate at room temperature, and use pure water to carry out circulating water washing after activation.

[0056] (4) Pre-nickel plating, recovery: Pre-nickel plating once, pre-nickel plating at 130g / LNi 2 SO 4 , 20g / LNiCl 2 , 30g / LH 3 BO 3 solution with a current density of 2.0A / dm 2 , a pH value of 1.0, a temperature of 35° C., and a Baume degree of 16.

[0057] (5) Dark nickel plating...

Embodiment 3

[0063] Embodiment 3: The thickness of the electroplated steel strip is 0.25mm, and the width is 987mm.

[0064] (1) Unwind the steel belt buffer pit.

[0065] (2) Then use 70g / LNaOH, 40g / LNa 2 CO 3 , 50g / LNa 3 PO 4 , 0.5mol / L detergent solution to degrease the steel strip at a temperature of 70°C; then use 55g / LNaOH, 40g / LNa 2 CO 3 , 40g / LNa 3 PO 4 solution at a current density of 10A / dm 2 , Electrochemical degreasing of the steel strip at a temperature of 70°C.

[0066] (3) After degreasing, wash with circulating water first, then activate with 80g / L analytically pure hydrochloric acid solution at room temperature, and then use pure water for circulating washing after activation.

[0067] (4) Pre-nickel plating, recovery: Pre-nickel plating once, pre-nickel plating at 190g / LNi 2 SO 4 , 40g / LNiCl 2 , 50g / LH 3 BO 3 solution with a current density of 2.5A / dm 2 , a pH value of 2.0, a temperature of 45° C., and a Baume degree of 17.

[0068] (5) Dark nickel plating...

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Abstract

The invention relates to the field of steel battery shell processing, in particular to a nickel plating method of steel belts for steel battery shells. The nickel plating method comprises the steps of unwinding the steel belts through buffering pits; removing grease dirt on the surfaces of the steel belts; sequentially carrying out cycled water washing, activating and cycled water washing; nickel pre-plating and recycling; dull nickel plating and recycling; sequentially carrying out cycled water washing, activating and cycled water washing; semi-gloss nickel plating; full-gloss nickel plating; and sequentially carrying out recycling, cycled water washing, drying and winding. Through nickel pre-plating, the sedimentation rate of nickel ions can be lowered, the porosity of the surface of a plating layer can be lowered, the binding force between the plating layer and the steel belts can be greater, and the corrosion resistance of the steel belts can be improved; dull nickel plating is used for providing a priming plating layer, the binding force of the plating layer can be increased, and the porosity of the plating layer can be lowered; semi-gloss nickel plating and full-gloss nickel plating are added, and therefore the surface brightness of products can be adjusted according to requirements of clients well; the production efficiency can be improved, the production cost of enterprises can be lowered, and the market competitive power of the products can be enhanced.

Description

technical field [0001] The invention relates to the field of battery steel cases, in particular to a nickel-plating method for steel strips used in battery steel cases. Background technique [0002] Electroplating is to use the cleaned and specially pretreated piece to be plated as the cathode in the plating tank filled with the electroplating solution, and use the plated metal to make the anode. The process of processing. In the electroplating process, the electroplating solution is composed of an aqueous solution containing a compound of the plating metal, conductive salts, buffers, pH regulators and additives. After electrification, the metal ions in the electroplating solution move to the cathode under the action of potential difference to form a plating layer. The metal of the anode forms metal ions into the plating solution to maintain the concentration of the metal ions being plated. In some cases, such as chrome plating, it is an insoluble anode made of lead or le...

Claims

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Application Information

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IPC IPC(8): C25D5/14C25D7/00
Inventor 覃昌林林田贵裕汤主
Owner HUNAN TOYO LEED MATERIAL SCI & TECH CO LTD
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