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Electroplating solution and preparation method thereof

An electroplating solution and electroplating tank technology, applied in the field of electroplating solution and its preparation, can solve the problems affecting the composition ratio of the coating layer, uneven color and ash, rough surface, etc., and achieve the effect of qualified product quality, no roughness, and smooth surface.

Inactive Publication Date: 2016-05-25
ZHEJIANG JINZE METAL SURFACE TREATMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of electroplating products in the traditional black nickel plating electroplating solution, due to the inaccurate control of factors such as the content of each component of the electroplating solution, the ratio of each component of the electroplating solution, and other control conditions (PH value or temperature), the after-plating The products often have quality problems (such as rough surface, peeling or uneven color). When the content is greater than a certain level, the coating is rough; (2) when the content of zinc sulfate is lower than a certain level, the coating is metallic gray (not black enough); when the content of zinc sulfate is greater than a certain level, the coating is deteriorated and has streaks; (3) Thiocyanate Potassium acid is used as a blackening agent. When its content is lower than a certain level, the coating will be gray, rough, and iridescent; Affect the composition ratio of the coating, if the current density is greater than a certain level, the zinc plating rate will increase, and the discharge reduction of nickel will be hindered by zinc flooding, which will inevitably reduce the nickel content in the coating and increase the zinc content; if the current density is less than a certain level, the nickel precipitation will increase. , the proportion of nickel in the coating increases from small to large, which will inevitably cause the color to change from thick to light, until the color gray is uneven, and the color appears; such as PH value or temperature, etc. are factors that affect the quality of electroplating products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of preparation method that is applicable to above-mentioned electroplating liquid, prepares according to the following steps:

[0023] a. Add 2 / 5 of the required volume of deionized water or purified water into the preparation tank, heat to 40 degrees, add 70g / L nickel sulfate and stir to dissolve it;

[0024] b. In another small container, stir and dissolve 40 / L zinc sulfate with a small amount of purified water or deionized water at a temperature of 40 degrees, and stir it into the preparation tank after dissolution;

[0025] c. In another small container, stir and dissolve 25g / L boric acid with a small amount of pure water or deionized water at a temperature of 95 degrees, and stir and add it to the preparation tank after dissolving;

[0026] d. In another small container, stir and dissolve 40g / L ammonium nickel sulfate with a small amount of pure water or deionized water at a temperature of 40 degrees, and stir it into the preparation tank after dissolving; ...

Embodiment 2

[0035] A kind of preparation method that is applicable to above-mentioned electroplating liquid, prepares according to the following steps:

[0036] a. Add 1 / 2 of the required volume of deionized water or purified water to the preparation tank, heat to 45 degrees, add 85g / L nickel sulfate and stir to dissolve it;

[0037] b. In another small container, stir and dissolve 45g / L zinc sulfate with a small amount of pure water or deionized water at a temperature of 45 degrees, and stir it into the preparation tank after dissolution;

[0038] c. In another small container, stir and dissolve 30g / L boric acid with a small amount of pure water or deionized water at a temperature of 97 degrees, and stir it into the preparation tank after dissolving;

[0039] d. In another small container, stir and dissolve 50g / L ammonium nickel sulfate with a small amount of pure water or deionized water at a temperature of 45 degrees, and stir it into the preparation tank after dissolving;

[0040] e....

Embodiment 3

[0048] A kind of preparation method that is applicable to above-mentioned electroplating liquid, prepares according to the following steps:

[0049] a. Add 3 / 5 of the required volume of deionized water or purified water to the preparation tank, heat to 50 degrees, add 100g / L nickel sulfate and stir to dissolve it;

[0050] b. In another small container, stir and dissolve 50g / L zinc sulfate with a small amount of pure water or deionized water at a temperature of 50 degrees, and stir it into the preparation tank after dissolving;

[0051] c. In another small container, stir and dissolve 35g / L boric acid with a small amount of purified water or deionized water at a temperature of 99 degrees, and stir it into the preparation tank after dissolving;

[0052] d. In another small container, stir and dissolve 60g / L ammonium nickel sulfate with a small amount of pure water or deionized water at a temperature of 50 degrees, and stir it into the preparation tank after dissolving;

[0053...

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PUM

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Abstract

The invention relates to the technical field of electroplating, and in particular relates to an electroplating solution and a preparation method thereof. The electroplating solution consists of the following components: 70 to 100 g / L nickel sulfate, 40 to 50 g / L zinc sulfate, 25 to 35 g / L boric acid, 25 to 35 g / L potassium thiocyanate, 40 to 60 g / L ammonium nickel sulfate, 1 to 2 ml / L hydrogen peroxide, 1 to 2 g / L activated carbon, the balance of deionized water or pure water. The pH value of the electroplating solution is adjusted to 4.5 to 5.5, the temperature of the electroplating solution is adjusted to 30 to 36 DEG C, and when in electroplating, the current density of the electroplating solution is 0.1 to 0.4 A / dm<2>. The electroplating solution is simple in process; and the obtained product is qualified in quality, has no scaling phenomenon, is uniform in color, has no phenomenon of local whitening points, has a smooth surface and has no roughness.

Description

technical field [0001] The invention relates to the technical field of electroplating, in particular to an electroplating solution and a preparation method thereof. Background technique [0002] In the process of electroplating products in the traditional black nickel plating electroplating solution, due to the inaccurate control of factors such as the content of each component of the electroplating solution, the ratio of each component of the electroplating solution, and other control conditions (PH value or temperature), the after-plating The products often have quality problems (such as rough surface, peeling or uneven color). When the content is greater than a certain level, the coating is rough; (2) when the content of zinc sulfate is lower than a certain level, the coating is metallic gray (not black enough); when the content of zinc sulfate is greater than a certain level, the coating is deteriorated and has streaks; (3) Thiocyanate Potassium acid is used as a blacke...

Claims

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Application Information

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IPC IPC(8): C25D3/56
CPCC25D3/56C25D3/562
Inventor 郭春芬张继生李云
Owner ZHEJIANG JINZE METAL SURFACE TREATMENT CO LTD
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