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Alloy electrolyte solution replacing chromium and preparation method thereof

An electrolyte and alloy technology, which is applied in the field of alloy electrolyte instead of chromium and preparation, can solve problems such as difficult operation, and achieve the effects of saving energy, solving environmental pollution, and realizing environmental protection

Inactive Publication Date: 2018-07-27
AOJIE SPECIAL AUTOCAR MFG YINGKOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Electrolyte solutions in the prior art require high temperature (at least 50°C) and high current (generally 4-10 A / dm 2 ), difficult to operate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] This embodiment provides a kind of alloy electrolyte that replaces chromium, is made of the raw material of following concentration:

[0046] Sodium citrate 80g / L,

[0047] Sodium Potassium Tartrate 3g / L,

[0048] Nickel sulfate 18g / L,

[0049] Sodium tungstate 60g / L,

[0050] Softener 3g / L,

[0051] Saccharin 0.4 g / L,

[0052] Coumarin 0.01g / L,

[0053] 1,4 butynediol 0.3g / L,

[0054] Sodium Lauryl Sulfate 0.05g / L,

[0055] pH value 7.3, low temperature 18°C, low current 0.8A / dm 2 , the anode is graphite,

[0056] What the complexing agent used in the present embodiment is two kinds of substances of sodium citrate and potassium sodium tartrate. Among the present invention, the sum of the concentrations of sodium citrate and potassium sodium tartrate is greater than the sum of the concentrations of nickel sulfate and sodium tungstate. Sodium citrate and potassium sodium tartrate in the prior art are very few, while sodium citrate, sodium potassium tartrate in t...

Embodiment 2

[0073] This embodiment provides a kind of alloy electrolyte that replaces chromium, is made of the raw material of following concentration:

[0074] Sodium citrate 120 g / L,

[0075] Sodium Potassium Tartrate 6 g / L,

[0076] Nickel sulfate 30 g / L,

[0077] Sodium tungstate 80 g / L,

[0078] Softener 5 g / L,

[0079] Saccharin 1.0 g / L,

[0080] Coumarin 0.3 g / L,

[0081] 1,4 Butynediol 0.5 g / L,

[0082] Sodium Lauryl Sulfate 0.1 g / L,

[0083] pH value 8.5, low temperature 30°C, low current 1A / dm 2 , the anode is graphite or nickel plate,

[0084] What the softening agent in the present embodiment adopted is cobalt sulfate and tetrasodium edetate.

[0085] The preparation method of the electrolyte and the electroplating method in this embodiment are the same as those in Embodiment 1.

Embodiment 3

[0087] This embodiment provides a kind of alloy electrolyte that replaces chromium, is made of the raw material of following concentration:

[0088] Sodium citrate 100 g / L,

[0089] Sodium Potassium Tartrate 5 g / L,

[0090] Nickel sulfate 25 g / L,

[0091] Sodium tungstate 70 g / L,

[0092] Softener 4 g / L,

[0093] Saccharin 0.7g / L,

[0094] Coumarin 0.16 g / L,

[0095] 1,4 Butynediol 0.4 g / L,

[0096] Sodium Lauryl Sulfate 0.08 g / L,

[0097] pH value 7.6, low temperature 25°C, low current 0.9A / dm 2 , the anode is graphite or nickel plate,

[0098] What the softening agent in the present embodiment adopted is cobalt sulfate and tetrasodium edetate.

[0099] The preparation method of the electrolyte and the electroplating method in this embodiment are the same as those in Embodiment 1.

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PUM

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Abstract

The invention discloses an alloy electrolyte solution replacing chromium, wherein the alloy electrolyte solution includes nickel sulfate, sodium tungstate, sodium citrate, potassium sodium tartrate, saccharin, coumarin, 1,4-butynediol, and lauryl sodium sulfate; the pH value is 7.3-8.5, the low temperature is 18-30 DEG C, the low electric current is 0.8-1 A / dm<2>, an anode is graphite or a nickelplate, a softening agent is cobalt sulfate and ethylenediamine tetraacetic acid tetrasodium salt. The alloy electrolyte solution replacing chromium has the advantages that under conditions of normal temperature and low electric current, a product with high hardness and good wear resistance, ductility, corrosion resistance and binding force can be plated.

Description

technical field [0001] The invention relates to the field of electroplating, in particular to an alloy electrolyte solution for replacing chromium and a preparation method. Background technique [0002] Electroplating is the process of plating a thin layer of other metals or alloys on the surface of certain metals using the principle of electrolysis. It is a process of using electrolysis to attach a layer of metal film to the surface of metal or other material parts to prevent Metal oxidation (such as rust), improve wear resistance, electrical conductivity, reflective properties, corrosion resistance (copper sulfate, etc.) and enhance the appearance. [0003] 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...

Claims

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Application Information

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