Anode activator used for cyanide-free silver plating and preparation method thereof

A cyanide-free silver plating and activator technology, applied in the field of electroplating silver, can solve the problems of excessive consumption of anode ions, unstable plating solution, low current density, etc. The effect of prolonging the service life

Inactive Publication Date: 2018-02-02
CHONGQING LIDAO SURFACE TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the object of the present invention is to provide a kind of formula and preparation method of the anodic activator of cyanide-free silver plating, to solve anode passiva

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The concentration ratio of each component of the anode activator described in the present embodiment is as follows:

[0020] Sugar thioacetate 0.5g / L

[0021] Ammonium thiocyanate 3g / L

[0022] The remainder of the solution is deionized water.

[0023] The preparation method of the anode activator described in the present embodiment is as follows:

[0024] 1) Preparation of sugar thioacetate solution: use water to dissolve the calculated and weighed amount of sugar thioacetate, stir and dissolve until clear, and set aside.

[0025] 2) Prepare ammonium thiocyanate solution: use water to dissolve ammonium thiocyanate in an amount corresponding to sugar thioacetate, stir and dissolve until clear, and set aside.

[0026] 3) Preparation of cyanide-free silver-plated anode activator: use the ammonium thiocyanate solution prepared in step (2) to slowly add to the sugar thioacetate solution prepared in step (1), then dilute to volume with water, continue to stir, and make it...

Embodiment 2

[0032] 1. The concentration ratio of each component of the anode activator described in the present embodiment is as follows:

[0033] Sugar thioacetate 1.5g / L

[0034] Ammonium thiocyanate 2g / L

[0035] The remainder of the solution is deionized water.

[0036] The preparation method of the anode activator described in the present embodiment is as follows:

[0037] 1) Preparation of sugar thioacetate solution: use water to dissolve the calculated and weighed amount of sugar thioacetate, stir and dissolve until clear, and set aside.

[0038] 2) Prepare ammonium thiocyanate solution: use water to dissolve ammonium thiocyanate in an amount corresponding to sugar thioacetate, stir and dissolve until clear, and set aside.

[0039] 3) Preparation of cyanide-free silver-plated anode activator: use the ammonium thiocyanate solution prepared in step (2) to slowly add to the sugar thioacetate solution prepared in step (1), then dilute to volume with water, continue to stir, and make...

Embodiment 3

[0045] 1. The concentration ratio of each component of the anode activator described in the present embodiment is as follows:

[0046] Sugar thioacetate 3g / L

[0047] Ammonium thiocyanate 1g / L

[0048] The remainder of the solution is deionized water.

[0049] The preparation method of the anode activator described in the present embodiment is as follows:

[0050] 1) Preparation of sugar thioacetate solution: use water to dissolve the calculated and weighed amount of sugar thioacetate, stir and dissolve until clear, and set aside.

[0051] 2) Prepare ammonium thiocyanate solution: use water to dissolve ammonium thiocyanate in an amount corresponding to sugar thioacetate, stir and dissolve until clear, and set aside.

[0052] 3) Preparation of cyanide-free silver-plated anode activator: use the ammonium thiocyanate solution prepared in step (2) to slowly add to the sugar thioacetate solution prepared in step (1), then dilute to volume with water, continue to stir, and make i...

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Abstract

The invention discloses an anode activator used for cyanide-free silver plating. The anode activator includes 0.1-5 g/L of sulfur-bearing derivatives, 0.1-5 g/L of ammonium thiocyanate, and the balance water. The sulfur-bearing derivatives are one or more thioacetate, thioformate, methyl ammonium sulphate or diallyl disulfide. The invention also discloses a preparation method of the anode activator. According to the anode activator used for cyanide-free silver plating, a silver anode can be made to be normally dissolved in a silver plating tank liquor; silver ions in tank liquor is maintainedto be a normal production range; and the service life of the tank liquor is prolonged and extra losses due to bad anodic dissolution is reduced.

Description

technical field [0001] The invention belongs to the technical field of electroplating silver, and in particular relates to an anode activator for cyanide-free silver plating and a preparation method thereof. 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. role, and can also play a role in improving wear resistance, electrical conductivity, light reflection, corrosion resistance, etc. [0003] The process of electroplating is basically as follows, the plating metal is on the anode, the substance to be plated is on the cathode, and the cathode and anode are connected by an electrolyte solution. After the DC power supply is applied, the metal at the anode will be oxidized (lose electrons), and the positi...

Claims

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Application Information

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IPC IPC(8): C25D3/46
CPCC25D3/46
Inventor 胡国辉刘军包海生肖春艳李谢武
Owner CHONGQING LIDAO SURFACE TECH
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