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Long-service-life high-speed acid environment protection bright chemical nickel plating additive and use method thereof

A technology of electroless nickel plating and additives, applied in liquid chemical plating, metal material coating process, coating, etc., can solve the problem of low stability and achieve stable coating performance and speed, bright coating, and stable plating solution good performance

Inactive Publication Date: 2010-10-06
济南德锡科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Add composite additives, nickel salt and hypophosphite directly to the water during production, adjust the plating solution after complete dissolution and perform electroless nickel plating. The service life is 6-8 cycles, but the stability is not very high

Method used

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  • Long-service-life high-speed acid environment protection bright chemical nickel plating additive and use method thereof
  • Long-service-life high-speed acid environment protection bright chemical nickel plating additive and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Preparation of Thiourea Derivatives

[0053] a. Add 200g of PEG600 to three four-neck bottles, add 500ml of acetone to each, then add 15g of thiourea, N 2 Under protection, slowly reflux for 5 hours, then cool to room temperature; wash the organic phase with saturated brine; remove the solvent under reduced pressure to obtain a solid, and obtain a white solid.

[0054] b. Add 200g of PEG100 into three four-neck bottles, add 500ml of acetone each, and then add 15g of thiourea, N 2 Under protection, slowly reflux for 5 hours, then cool to room temperature; wash the organic phase with saturated brine; remove the solvent under reduced pressure to obtain a solid, and obtain a white solid.

[0055] c. Add 200g of PEG2000 to three four-necked bottles, add 500ml of acetone to each, and then add 15g of thiourea, N 2 Under protection, slowly reflux for 5 hours, then cool to room temperature; wash the organic phase with saturated brine; remove the solvent under reduced pressure ...

Embodiment 2

[0057] The stabilizer in this example is selected from the thiourea derivative prepared in Example 1 (a) and potassium iodate in a weight ratio of 1:20 to form a composite stabilizer.

[0058] (1) Agent A (1L as an example):

[0059] NiSO 2 ·6H 2 O 430g

[0060] Lactic acid 45g

[0061] Composite stabilizer 0.4g,

[0062] Preparation:

[0063] a. Add about 1 / 2 of the required amount of water and heat to about 70°C;

[0064] b. Add nickel sulfate and stir until completely dissolved;

[0065] c. Add 6g of activated carbon, stir evenly and let it stand for 2 hours, filter out the activated carbon;

[0066] d. Add buffer and complexing agent, stir until completely dissolved;

[0067] e. Dissolve the stabilizer with hot water, then pour it into the solution prepared in step d, add water to the required scale, stir evenly, and obtain Agent A for later use.

[0068] (2) Agent B (1L as an example):

[0069] Sodium hypophosphite 180g

[0070] Lactic acid 100g

[0071] Malic...

Embodiment 3

[0098] The stabilizer in this embodiment is selected from the thiourea derivative prepared in Example 1 (b) and potassium bromate in a weight ratio of 1:15 to form a composite stabilizer.

[0099] (1) Agent A (1L as an example):

[0100] NiSO 2 ·6H 2 O 435g

[0101] Sodium acetate 20g

[0102] Sodium tetraborate 15g

[0103] Composite stabilizer 0.5g,

[0104] a. Add about 1 / 2 of the required amount of water and heat to about 70°C;

[0105] b. Add nickel sulfate and stir until completely dissolved;

[0106] c. Add 8g of activated carbon, stir evenly and let it stand for 1 hour, then filter out the activated carbon;

[0107] d. Add buffer and complexing agent, stir until completely dissolved;

[0108] e. Dissolve the stabilizer with hot water, then pour it into the solution prepared in step d, add water to the required scale, stir evenly, and obtain Agent A for later use.

[0109] Agent B (1L as an example):

[0110] Sodium hypophosphite 190g

[0111] Lactic acid 115...

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Abstract

The invention relates to a long-service-life high-speed acid environment protection bright chemical nickel plating additive and a use method thereof. A complexing agent in the additive is a mixture of three kinds or more than three kinds of materials in lactic acid, malic acid, citric acid, glycine, glycollic acid and salicylic acid through being mixed according to any proportion. A stabilizing agent is a composite stabilizing agent prepared from thiosemicarbazone derivatives and oxygenated chemicals according to a mass ratio of 1 / 10 to 30, and the oxygenated chemicals are iodate or molybdateor bromate, an accelerating agent is one kind of materials in glutaric acid or adipic acid. A buffering agent is prepared from either boric acid or sodium tetraborate and either acetic acid or sodiumacetate according to a mass ratio of 1 / 2 to 5. The chemical nickel plating additive of the invention can realize the mass production. When being used, the chemical nickel plating additive is directlyadded into water to be diluted according to the proportion for use, and the operation is simple. After the use for 8 to 10 periods, the plating layer performance and the speed are still stable, the stability of plating liquid is good, nickel is not separated out from the wall of a tank, the phosphorus content of the plating layer is stabilized ranged from 5 to 8 percent, and the plating layer is bright.

Description

technical field [0001] The invention relates to the technical field of electroless nickel plating treatment on metal surfaces, in particular to a long-life, high-speed, acidic, environment-friendly and bright electroless nickel plating additive and a use method thereof. Background technique [0002] Electroless nickel plating, also known as electroless nickel plating, is a film-forming technology that deposits a metal coating on the metal surface by means of a self-catalyzed chemical reaction in a solution where a metal salt and a reducing agent coexist. [0003] The electroless nickel-phosphorus alloy coating has comprehensive physical and chemical properties such as excellent throwing property, high hardness, good wear resistance and corrosion resistance. At present, it is almost difficult to find an industrial field that does not use electroless nickel plating technology. According to reports, the proportion of electroless nickel plating in various industries is roughly a...

Claims

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Application Information

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IPC IPC(8): C23C18/36
Inventor 朱艳丽宋邦强王凯铭
Owner 济南德锡科技有限公司
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