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Deplating liquid for NiCuNi plating on surface of sintered NdFeB and deplating process thereof

A deplating solution and NdFeB technology, applied in the field of deplating solution, can solve problems such as low efficiency, product substrate corrosion, scrapping, etc., and achieve the effects of eliminating environmental pollution, reducing physical hazards, and improving pass rate

Inactive Publication Date: 2012-11-21
牛凯
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, if other deplating processes containing strong acid or strong alkali are used, when the surface coating of the product is removed, the substrate of the product has been severely corroded, completely losing its use value, resulting in serious scrap
Although there is also a step-by-step cyanide-free deplating method, the operation steps are cumbersome and inefficient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The solvent of the deplating solution for the nickel-copper-nickel coating on the surface of sintered NdFeB is deionized water or clean tap water, and the composition and content of the solute are:

[0059] Anti-staining salt S 60g / L,

[0060] Ethylenediamine 120 ml / L,

[0061] Antiseptic complexing agent: sodium citrate 20g / L,

[0062] Inorganic acid: nitric acid 50ml / L,

[0063] Surfactant: potassium thiocyanate 0.5g / L;

[0064] The specific operation steps of the deplating process are as follows:

[0065] First put deionized water or clean tap water into a glass or PP or PVC plastic deplating tank, with a total volume of 5 liters, and add deionized water to half of the total volume.

[0066] Then dilute the above medicines with the nitric acid of mineral acid 1:1 with purified water or clean tap water, and then follow the order of anti-staining salt S, anti-corrosion complexing agent, ethylenediamine, inorganic acid, and surfactant in the order of the above-m...

Embodiment 2

[0068] The solvent of the deplating solution for the nickel-copper-nickel coating on the surface of NdFeB is deionized water or clean tap water, and the composition and content of the solute are:

[0069] Anti-staining salt S 70g / L,

[0070] Ethylenediamine 130 ml / L,

[0071] Antiseptic complexing agent: sodium citrate 30g / L,

[0072] Inorganic acid: nitric acid 80ml / L,

[0073] Surfactant: potassium thiocyanate 0.8g / L;

[0074] The specific operation steps of the deplating process are as follows:

[0075] First put deionized water or clean tap water into a glass or PP or PP or PVC plastic tank with a total volume of 5 liters, and add deionized water to half of the total volume.

[0076] Then dilute the above medicines, inorganic acid: nitric acid 1:1 with purified water or clean tap water, and follow the order of anti-staining salt S, anti-corrosion complexing agent, ethylenediamine, inorganic acid, and surfactant according to the above-mentioned order. After the req...

Embodiment 3

[0078] The solvent of the deplating solution for the nickel-copper-nickel coating on the surface of NdFeB is deionized water or clean tap water, and the composition and content of the solute are:

[0079] Anti-staining salt S 90g / L,

[0080] Ethylenediamine 150 ml / L,

[0081] Antiseptic complexing agent: sodium citrate 40g / L,

[0082] Inorganic acid: nitric acid 100ml / L,

[0083] Surfactant: potassium thiocyanate 1g / L;

[0084] The specific operation steps of the deplating process are as follows:

[0085] First put deionized water or clean tap water into a glass, PP or PVC plastic deplating tank with a total volume of 5 liters, and add deionized water to half of the total volume.

[0086] Then dilute the above medicines, inorganic acid: nitric acid 1:1 with purified water or clean tap water, and follow the order of anti-staining salt S, anti-corrosion complexing agent, ethylenediamine, inorganic acid, and surfactant according to the above-mentioned order. After the re...

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PUM

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Abstract

The invention discloses a deplating liquid for a NiCuNi plating on the surface of sintered NdFeB and a deplating process thereof. The deplating liquid for the NiCuNi plating on the surface of sintered NdFeB adopts deionized water or clean tap water as the liquid solvent, and all components and component contents are as follows: 60-90g / L reserve salt S, 120-150ml / L ethylene diamine, 20-40g / L anti-corrosion complexing agent and 50-100ml / L mineral acid. The solute further comprises a surface active agent of 0.5-1g / L. The anti-corrosion complexing agent is sodium citrate or triammonium citrate; the mineral acid is nitric acid or ammonium nitrate; and the surface active agent is potassium thiocyanate, or sodium sulfocyanate or ammonium thiocyanate. The deplating process comprises the following steps: preparing a deplating bath; disposing a deplating liquid; executing the deplating; and removing the deplating liquid on a product. The deplating liquid has the advantages of stable property, good deplating effect and low cost; and the deplating operation is simple and convenient, pollution is prevented, body harm of operators is relieved, waste is changed into valuable and the benefits are remarkable.

Description

Technical field [0001] The present invention involves a degenerate plating solution that is plated on the plating of the surface plating of the iron boron and its use of the decoction liquid to implement the decoction solution.Specifically, it is a degenerate plating solution and its antipyretic plating process of sintering 钕 iron boron surface. Background technique [0002] Since the development of Tie Iron Boron rare earth permanent magnet materials, since the 1980s, it has obtained high -speed development and extensive application in high -tech fields such as electronics industry, automobile manufacturing, wind power, aviation, and aerospace.However, due to its strong chemical activity, the surface is easily oxidized and corroded, and eventually it can easily change the surface and structure of the magnet. The magnetic properties decreased sharply, and the phenomenon of fragmentation eventually occurred.Therefore, in order to improve the anticorrosive properties of 钕 iron boro...

Claims

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Application Information

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IPC IPC(8): C23G1/19
Inventor 牛庆章牛凯牛凯莉
Owner 牛凯
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