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Environment-friendly electroplating solution for replacing chromium and preparation method thereof

An electroplating solution and an environment-friendly technology, which is applied in the field of environment-friendly chromium-substituting electroplating solution and preparation, can solve problems such as limited development, difficulty in stabilizing the cobalt content of the plating layer, and poor control of the cobalt content, achieving good bonding and energy-saving effects

Inactive Publication Date: 2018-06-08
AOJIE SPECIAL AUTOCAR MFG YINGKOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The control of the cobalt content in the electroplating solution formula in the prior art is not good, and the cobalt content of the coating is difficult to stabilize, which limits its development

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The present embodiment provides a kind of environment-friendly type chromium substitute electroplating solution, is made of the raw material of following concentration:

[0039] Nickel sulfate 40g / L,

[0040] Cobalt sulfate 2g / L,

[0041] Complexing agent 120g / L,

[0042] Saccharin 0.4g / L,

[0043] Vanillin 0.01g / L,

[0044] 1,4 butynediol 0.3g / L,

[0045] Sodium Lauryl Sulfate 0.05g / L,

[0046] pH value 7.3, low temperature 18°C, low current 0.8A / dm 2 , the anode is graphite,

[0047] The complexing agent used in this embodiment is potassium sodium tartrate and tetrasodium edetate. The concentration of complexing agent among the present invention is more than twice of the sum of nickel sulfate and cobalt sulfate concentration, and the complexing agent component in the prior art is very little, and the complexing agent concentration among the present invention is inventor's creative process The multiple relationship obtained by labor can overcome the problem tha...

Embodiment 2

[0064] The present embodiment provides a kind of environment-friendly type chromium substitute electroplating solution, is made of the raw material of following concentration:

[0065] Nickel sulfate 70g / L,

[0066] Cobalt sulfate 9 g / L,

[0067] Complexing agent 195 g / L,

[0068] Saccharin 1.0 g / L,

[0069] Vanillin 0.3 g / L,

[0070] 1,4 Butynediol 0.5 g / L,

[0071] Sodium Lauryl Sulfate 0.1 g / L,

[0072] pH value 8.5, low temperature 30°C, low current 1A / dm 2 , the anode is graphite or nickel plate,

[0073] The complexing agent used in this embodiment is potassium sodium tartrate and tetrasodium edetate.

[0074] The preparation method of the electroplating solution and the electroplating method in this embodiment are the same as in Embodiment 1.

Embodiment 3

[0076] The present embodiment provides a kind of environment-friendly type chromium substitute electroplating solution, is made of the raw material of following concentration:

[0077] Nickel sulfate 55g / L,

[0078] Cobalt sulfate 5g / L,

[0079] Complexing agent 160g / L,

[0080] Saccharin 0.7g / L,

[0081] Vanillin 0.16 g / L,

[0082] 1,4 Butynediol 0.4 g / L,

[0083] Sodium Lauryl Sulfate 0.08 g / L,

[0084] pH value 7.6, low temperature 25°C, low current 0.9A / dm 2 , the anode is graphite or nickel plate,

[0085] The complexing agent used in this embodiment is potassium sodium tartrate and tetrasodium edetate.

[0086] The preparation method of the electroplating solution and the electroplating method in this embodiment are the same as in Embodiment 1.

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PUM

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Abstract

The invention discloses an environment-friendly electroplating solution for replacing chromium. The electroplating solution comprises nickel sulfate, cobalt sulfate, a complexing agent, saccharin or saccharin sodium, vanillin or coumarin, 1,4-butynediol and lauryl sodium sulfate, wherein the pH value is 7.3-8.5, the low temperature is 18-30 DEG C, the lower current is 0.8-1A / dm2, the anode is a graphite or nickel plate, the complexing agent is at least one of sodium potassium tartrate, ethylene diamine tetraacetic acid tetrasodium, ethylenediamine tetraacetic acid disodium and sodium citrate,and the concentration of the complexing agent is more than two times of the sum of the concentration of the nickel sulfate and the cobalt sulfate. The environment-friendly electroplating solution forreplacing the chromium has the advantages that the products with high hardness, wear resistance, ductility and corrosion resistance, and good binding force can be plated.

Description

technical field [0001] The invention relates to the field of electroplating, in particular to an environment-friendly chromium-substituting electroplating solution and a preparation method. Background technique [0002] The chrome-plating process is very polluting to the environment. Because it is highly toxic, it is extremely harmful to the operator's body. Even if the trivalent chrome process is used for chrome-plating, it is not environmentally friendly. In recent years, products exported to some developed countries are not allowed to contain chromium. [0003] Compared with traditional chromium coatings, nickel-cobalt alloy coatings have good high-temperature corrosion resistance, greatly reduce environmental pollution, have small internal stress, stable structure, and higher hardness than nickel coatings. They can replace chromium coatings as high-temperature environment corrosion-resistant coatings. The control of the cobalt content in the electroplating solution form...

Claims

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Application Information

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IPC IPC(8): C25D3/56
CPCC25D3/562
Inventor 李伯相
Owner AOJIE SPECIAL AUTOCAR MFG YINGKOU
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