A kind of nano-silver additive for cyanide-free electroplating

An additive, nano-silver technology, applied in the field of electroplating additives, to achieve excellent bright effect, widen the range of current density, and good bright effect

Active Publication Date: 2022-03-15
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The glossiness of the silver plating layer obtained by the cyanide-free bright silver plating solution mentioned in patent CN201710738117.3 is only 110Gu

Method used

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  • A kind of nano-silver additive for cyanide-free electroplating
  • A kind of nano-silver additive for cyanide-free electroplating
  • A kind of nano-silver additive for cyanide-free electroplating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation process of nano-silver additive for cyanide-free electroplating: (1) Add 700 mL of pure water to a container with a volume of 1 L; (2) Add an appropriate amount of sodium hydroxide solution to adjust the pH value to 10.5; (3) Add to the container Add 3 g ammonium dodecylsulfonate, 3 g sodium dodecylbenzenesulfonate and 3 g sodium dodecyl sulfate, stir and dissolve; (4) add 35 g gamma-butene lactam into the container , 15 g δ-pentenyl lactam, 10 g phthalimide, 10 g polybutene imide-1000, 10 g polyglutarimide-1000, stir and dissolve; (5) Then add 5 g of aminopyrimidine, 2 g of 4-acetylaminopyrimidine, and 3 g of sulfadiazine into the container, stir and dissolve; (6) mix 1.85 g of sulfathiazole thioglycolic acid, 0.3 g of sulfathiazole thioethanolamine, and Dissolve 0.35 g of pyridinium propanesulfonate in 150 mL of pure water, pour it into a container, and stir to mix it evenly; (7) Add pure water to 1 L. The nano-silver additive for cyanide-free electro...

Embodiment 2

[0022] The preparation process of nano-silver additive for cyanide-free electroplating: (1) Add 700 mL of pure water to a container with a volume of 1 L; (2) Add an appropriate amount of potassium hydroxide solution to adjust the pH value to 10.8; (3) Add to the container Add 3 g ammonium dodecyl sulfonate, 3 g sodium dodecylbenzene sulfonate and 4 g sodium dodecyl sulfate, stir and dissolve; (4) add 35 g gamma-butene lactam into the container , 15 g δ-pentenyl lactam, 10 g phthalimide, 10 g polybutene imide-1000, 10 g polypentylene imide-1000, stir and dissolve; (5) Add 5 g of aminopyrimidine, 3 g of 4-acetylaminopyrimidine, and 2 g of sulfadiazine into the container, stir and dissolve; (6) Add 1.85 g of sulfathiazole thioglycolic acid, 0.35 g of sulfathiazole thioethanolamine, and 0.35 g of propane After dissolving pyridinium sulfonate salt in 150 mL of pure water, pour it into the container, stir to mix evenly; (7) add pure water to 1 L.

Embodiment 3

[0024] The preparation process of nano-silver additive for cyanide-free electroplating: (1) Add 700 mL of pure water to a container with a volume of 1 L; (2) Add an appropriate amount of sodium hydroxide solution to adjust the pH value to 10.5; (3) Add to the container Add 4 g ammonium dodecylsulfonate, 3 g sodium dodecylbenzenesulfonate and 3 g sodium dodecyl sulfate, stir and dissolve; (4) add 35 g gamma-butene lactam into the container , 15 g δ-pentenyl lactam, 10 g phthalimide, 10 g polybutene imide-1000, 10 g polypentylene imide-1000, stir and dissolve; (5) Add 5 g of aminopyrimidine, 2 g of 4-acetylaminopyrimidine, and 3 g of sulfadiazine into the container, stir and dissolve; (6) Add 1.5 g of sulfathiazole thioglycolic acid, 0.35 g of sulfathiazole thioethanolamine, and 0.35 g of propane After dissolving pyridinium sulfonate salt in 150 mL of pure water, pour it into the container, stir to mix evenly; (7) add pure water to 1 L.

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Abstract

Contain main brightener 60~80g / L, auxiliary brightener 10~20g / L, surface wetting agent 5~10g / L and protective agent 1~3g / L respectively in a kind of cyanide-free electroplating nano-silver additive of the present invention, wherein The main brightener consists of 25%~50% of γ-butene lactam, 10%~15% of polybutene diimide, 15%~35% of δ-pentene lactam, 10%~15% of It is composed of polyglutaconimide and 10%~15% of phthalimide. The additive of the present invention can effectively improve the brightness and discoloration resistance of the coating, and can achieve high brightness and grain refinement effects at room temperature, the coating brightness can reach more than 600 Gu, and the crystal grains can be refined to nanometers; the stability is strong, It can still have an excellent bright effect after long-term electroplating operations or standing still; and the production cost is low, the efficiency is high, and it is environmentally friendly.

Description

technical field [0001] The invention relates to a nano-silver additive for cyanide-free electroplating, aimed at an additive used in electroplating silver under direct current or pulse conditions in a cyanide-free plating solution, and specifically belongs to the technical field of electroplating additives. Background technique [0002] With the improvement of people's living standards and the development of science and technology, people's demand and requirements for silver-plated parts are also increasing day by day. Industrial production of silver plating generally adopts electroplating methods. At present, the mainstream electroplating silver systems contain cyanide, and cyanide is often highly toxic. With the increasing awareness of environmental protection and safety, cyanide electroplating has gradually been eliminated. However, no matter what the electroplating conditions are, it is difficult to obtain a dense and bright plating layer without any additives, and dendr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/46
CPCC25D3/46
Inventor 刘光明甘鸿禹唐荣茂熊义刘永强刘欢欢官宇
Owner NANCHANG HANGKONG UNIVERSITY
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