Chemical nickel-plating liquor

A technology of electroless nickel plating solution and nickel salt, applied in liquid chemical plating, metal material coating process, coating, etc., can solve the problems of difficulty in obtaining phosphorus, inability to process workpieces, low plating speed, etc., and achieve the best coating appearance Good, low cost, strong throwing ability

Active Publication Date: 2014-11-19
广东致卓环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are two main problems in the low-phosphorus electroless nickel plating solution used now: one is that most of the plating solution has a working pH value greater than 8, and the plating speed is low, which cannot handle some workpieces that are not suitable for alkaline conditions; Electroless nickel plating solution, it is difficult to obtain a nickel-phosphorus coating with a mass content of less than 3.5% phosphorus, especially less than 1.5%

Method used

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  • Chemical nickel-plating liquor
  • Chemical nickel-plating liquor
  • Chemical nickel-plating liquor

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Present embodiment uses electroless nickel plating liquid of the present invention to carry out electroless nickel plating to low carbon steel, and its operation process is as follows:

[0028] 1. Put 0.5g thiourea and 2g potassium iodate in a beaker, add deionized water, stir with a magnetic stirrer until clarified, add deionized water to a 1L volumetric flask to obtain 1L of stabilizer solution;

[0029] 2. Put 2g sodium polydithiodipropane sulfonate and 0.5g sodium N,N-dimethyldithioformamide propane sulfonate into a beaker, add deionized water, stir with a magnetic stirrer until clear, Add deionized water to a 1L volumetric flask to obtain 1L of phosphorus content inhibitor solution;

[0030] 3. Put 50g of ammonium acetate, 50g of lactic acid, and 140g of succinic acid into a beaker, add deionized water, stir with a magnetic stirrer until clarification, and obtain 1L of complexing agent after constant volume in a 1L volumetric flask;

[0031] Wherein, the sequence ...

Embodiment 2

[0035] Present embodiment uses electroless nickel plating liquid of the present invention to carry out electroless nickel plating to stainless steel, and its operation process is as follows:

[0036] 1. Put 0.8g of thiourea, 1g of potassium iodide, and 0.5g of cerium sulfate into a beaker, add deionized water, stir with a magnetic stirrer until clear, add deionized water to a 1L volumetric flask to obtain 1L of stabilizer solution ;

[0037] 2. Put 0.5g of methylthiourea and 4g of isothiourea propanesulfonic acid inner salt into a beaker, add deionized water, stir with a magnetic stirrer until clarified, add deionized water to a 1L volumetric flask to obtain Phosphorus content inhibitor solution 1L;

[0038] 3. Put 40g of sodium acetate, 70g of lactic acid, and 100g of succinic acid into a beaker, add deionized water, stir with a magnetic stirrer until clarification, and obtain 1L of complex complexing agent after constant volume in a 1L volumetric flask;

[0039] Wherein, t...

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PUM

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Abstract

The invention discloses chemical nickel-plating liquor. The chemical nickel-plating liquor is characterized by comprising the following components: 22g / L-35g / L of nickel salt, 15g / L-25g / L of hypophosphite, 200mL / L-250mL / L of compound complexing agent, 0.5mL / L-1.5mL / L of stabilizer and 0.5mL / L-2.0mL / L of phosphor content inhibitor. The liquor is worked in a nearly neutral condition, and is free of obvious alkaline corrosion and acid corrosion on a workpiece; and the mass content of the phosphor in the obtained coating is 0.3%-3.5%, and the coating is high in hardness and good in weldability.

Description

technical field [0001] The invention relates to the technical field of electroless nickel plating, in particular to an electroless nickel plating solution. Background technique [0002] The fastest growing type of electroless plating. The plating solution generally uses nickel sulfate, nickel acetate, etc. as the main salt, hypophosphite, sodium borohydride, borane, etc. as the reducing agent, and various additives are added. Carry out operation in the acidic solution of 90 ℃ or the neutral solution near normal temperature, alkaline solution, divide into chemical nickel-phosphorous plating, chemical nickel-boron two big classes with the difference of using reducing agent, what the present invention discusses is chemical plating Nickel-phosphorous plating and the like. At present, low-phosphorus electroless nickel-phosphorus alloy plating has the advantages of high hardness, good weldability, wear resistance and alkali corrosion resistance, and has been applied in many fiel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/36
Inventor 谢金平冯荣坤吴耀程李宁范小玲王群
Owner 广东致卓环保科技有限公司
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