Manganese-bismuth-iron-phosphor permanent magnetic alloy plating solution and preparation method thereof

A technology of permanent magnet alloy and electroplating solution, applied in liquid application, application of magnetic film to substrate, etc., to achieve the effect of long standing time, good alloy stability, good plasticity and thermal conductivity

Inactive Publication Date: 2015-07-22
CHINA JILIANG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Manganese-bismuth-iron-phosphor permanent magnetic alloy plating solution and preparation method thereof
  • Manganese-bismuth-iron-phosphor permanent magnetic alloy plating solution and preparation method thereof

Examples

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Embodiment 1

[0020] Dissolve 40g of boric acid in 0.5L of warm water, add 40g of sodium hypophosphite and 40g of sodium citrate in turn under stirring, stir thoroughly, and mix well to obtain solution A; adjust the pH of solution A with 1.0mol / L HCl 2. Add 10g of ferrous chloride, 60g of manganese chloride, 6g of bismuth chloride and 3g of ascorbic acid in turn under stirring. After fully stirring for 2 hours, add an appropriate amount of water to dissolve to 1L to obtain the manganese, bismuth, iron and phosphorus permanent magnet alloy plating solution.

[0021] Use the Pt sheet as the anode and the copper foil as the cathode, electroplate in the manganese-bismuth-iron-phosphorus permanent magnet alloy electroplating solution obtained above, the electroplating voltage is 3.0V, the temperature of the electroplating solution is 28°C, the electroplating time is 10 minutes, and the electroplating ends Finally, the coating is washed with ethanol and water in sequence, and then dried to obtain ...

Embodiment 2

[0024] Dissolve 35g of boric acid in 0.5L of warm water, add 45g of sodium hypophosphite and 35g of sodium citrate in turn under stirring, stir thoroughly, and mix well to obtain solution A; adjust the pH of solution A with 1.0mol / L HCl 2. Under stirring, add 5g of ferrous chloride, 55g of manganese chloride, 2g of bismuth chloride and 1g of ascorbic acid in sequence. After fully stirring for 2 hours, add an appropriate amount of water to set the volume to 1L to obtain manganese, bismuth, iron and phosphorus permanent magnet alloy plating liquid.

[0025] Use the Pt sheet as the anode and the copper foil as the cathode, electroplate in the manganese-bismuth-iron-phosphorus permanent magnet alloy electroplating solution obtained above, the electroplating voltage is 2.0V, the temperature of the electroplating solution is 20°C, the electroplating time is 15 minutes, and the electroplating ends Finally, the coating is washed with ethanol and water in sequence, and then dried to ob...

Embodiment 3

[0028] Dissolve 45g of boric acid in 0.5L of warm water, add 30g of sodium hypophosphite and 42g of sodium citrate in turn under stirring, stir thoroughly, and mix well to obtain solution A; adjust the pH of solution A with 1.0mol / L HCl 2. Under stirring, sequentially add 15g of ferrous chloride, 65g of manganese chloride, 10g of bismuth chloride and 5g of ascorbic acid. After fully stirring for 2 hours, add an appropriate amount of water to set the volume to 1L to obtain manganese, bismuth, iron and phosphorus permanent magnet alloy plating liquid.

[0029] Use the Pt sheet as the anode and the copper foil as the cathode, electroplate in the manganese-bismuth-iron-phosphorus permanent magnet alloy electroplating solution obtained above, the electroplating voltage is 5.0V, the temperature of the electroplating solution is 35°C, the electroplating time is 20 minutes, and the electroplating is completed Finally, the coating is washed with ethanol and water in sequence, and then ...

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Abstract

The invention discloses a manganese-bismuth-iron-phosphor permanent magnetic alloy plating solution and a preparation method thereof, which belong to the field of metal plating electro-deposition. The manganese-bismuth-iron-phosphor permanent magnetic alloy plating solution contains ferrous chloride, manganese chloride, bismuth chloride, and a proper amount of water, and additionally comprises boric acid, sodium hypophosphate, sodium citrate and ascorbic acid. Each component of the plating solution is, by weight, 35-45 parts of boric acid, 30-45 parts of sodium hypophosphate, 5-15 parts of ferrous chloride, 55-65 parts of manganese chloride, 4-10 parts of bismuth chloride, 35-45 parts of sodium citrate, and 1-5 parts of ascorbic acid. The invention also provides the preparation method of the manganese-bismuth-iron-phosphor permanent magnetic alloy plating solution, and the preparation method comprises: taking a Pt sheet as an anode, taking a workpiece to be plated as a cathode; and carrying out plating in the plating solution, wherein the temperature of the plating solution is 20-40 DEG C and the voltage while plating is 2.0-5.0V. The plating solution is high in chemical stability and low in cost and has no pollution. The preparation method is simple and controllable; a prepared manganese-bismuth-iron-phosphor permanent magnetic alloy plating layer is high in corrosion resistance and good in magnetic performance; and the plating solution is mainly applied to the fields such as surface decoration of hardware products and magnetic materials.

Description

technical field [0001] The invention relates to a manganese-bismuth-iron-phosphorus permanent magnet alloy electroplating solution and a preparation method thereof, and belongs to the field of metal coating electrodeposition preparation. Background technique [0002] Electroplating has the advantages of low cost, simple process, and easy operation. It is widely used in our life and is closely related to all aspects of life. Electroplating is one of the most effective methods in surface treatment technology. In the past, it was mainly electroplating single metal, which is far from meeting the modern requirements for surface performance. Therefore, with the rapid development of electroplating alloys in the past 20 years, it can not only obtain a surface with special properties, but also has a wide variety and a wider range of applications. At present, it has been applied to magnetic materials and other industries. The MnBi alloy with magnetic properties has been widely co...

Claims

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Application Information

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IPC IPC(8): C25D3/56H01F41/26
CPCC25D3/56H01F41/26
Inventor 张朋越郑小美卢阳春丁丽菁
Owner CHINA JILIANG UNIV
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