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Alkaline cyanide-free zinc plating additive and preparation method thereof

A galvanizing additive and additive technology, applied in the field of alkaline cyanide-free galvanizing additive and its preparation, can solve problems such as low gloss, poor performance improvement of zinc plating solution, and insufficient corrosion resistance of galvanized layer, etc. Improved performance such as dispersing ability, good gloss, and good corrosion resistance

Inactive Publication Date: 2020-06-05
浙江金欣新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. Lack of an efficient alkaline cyanide-free zinc plating additive;
[0007] 2. The corrosion resistance of the galvanized layer after electroplating is not good enough, and the gloss is low;
[0008] 3. The performance improvement of the zinc plating solution is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] An alkaline cyanide-free zinc plating additive, comprising the following raw materials in parts by weight:

[0033] Main complexes, secondary complexes, surfactants and other additives;

[0034] The main complex is potassium hydrogen tartrate;

[0035] The auxiliary complex is 2-mercaptobenzimidazole zinc salt;

[0036] The surfactant is 2-mercaptobenzimidazole;

[0037] The other additive is 5-butylbenzotriazole.

[0038] Preferably, the amount of the alkaline cyanide-free zinc-plating additive is such that the contents of each raw material in each liter of electro-galvanizing bath are: 5-25 mg / L of the main complex, 1.5-4.5 mg / L of the auxiliary complex, Surfactant 40-80mg / L and other additives 10-17mg / L.

[0039] Preferably, the amount of the alkaline cyanide-free zinc plating additive is such that the content of each raw material in each liter of electro-galvanizing bath is: 9-20 mg / L of the main complex, 2-3.8 mg / L of the auxiliary complex, Surfactant 50~65mg / ...

Embodiment 2

[0047] An alkaline cyanide-free zinc plating additive, comprising the following raw materials in parts by weight:

[0048] Main complexes, secondary complexes, surfactants and other additives;

[0049] The main complex is potassium hydrogen tartrate;

[0050] The auxiliary complex is 2-mercaptobenzimidazole zinc salt;

[0051] The surfactant is 2-mercaptobenzimidazole;

[0052] The other additive is 5-butylbenzotriazole.

[0053] In this embodiment, the dosage of the alkaline cyanide-free zinc plating additive is that the contents of each raw material in each liter of electroplating zinc plating solution are respectively: main complex 9 mg / L, auxiliary complex 2 mg / L, surface active Agent 50mg / L and other additives 11.5mg / L.

[0054] In this embodiment, sodium hydroxide is also included; the sodium hydroxide adjusts the pH of the electro-galvanizing bath to 10.

[0055] In the present embodiment, the preparation method of described alkaline cyanide-free zinc plating addit...

Embodiment 3

[0059] An alkaline cyanide-free zinc plating additive, comprising the following raw materials in parts by weight:

[0060] Main complexes, secondary complexes, surfactants and other additives;

[0061] The main complex is potassium hydrogen tartrate;

[0062] The auxiliary complex is 2-mercaptobenzimidazole zinc salt;

[0063] The surfactant is 2-mercaptobenzimidazole;

[0064] The other additive is 5-butylbenzotriazole.

[0065] In this embodiment, the dosage of the alkaline cyanide-free zinc-plating additive is that the content of each raw material in each liter of electro-galvanizing bath is respectively: 20 mg / L of the main complex, 3.8 mg / L of the auxiliary complex, and 3.8 mg / L of the surface Active agent 65mg / L and other additives 15mg / L.

[0066] In this embodiment, sodium hydroxide is also included; the sodium hydroxide adjusts the pH of the electro-galvanizing bath to 10.5.

[0067] In the present embodiment, the preparation method of described alkaline cyanide-fr...

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Abstract

The invention discloses an alkaline cyanide-free zinc plating additive. The alkaline cyanide-free zinc plating additive is prepared from the raw materials in parts by weight: a main complex, an auxiliary complex, a surfactant and other additives. The main complex is potassium hydrogen tartrate, the auxiliary complex is 2-mercaptobenzimidazole zinc salt, the surfactant is 2-mercaptobenzimidazole, and the other additives are 5-butyl benzotriazole. The alkaline cyanide-free zinc plating additive is a highly efficient alkaline cyanide-free zinc plating additive, after addition and use, the dispersibility and other properties of zinc plating bath are improved, the plating (zinc) layer is smooth, good in gloss and good in corrosion resistance.

Description

technical field [0001] The invention relates to the technical field of additives for electroplating, in particular to an alkaline cyanide-free zinc plating additive 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 ( Such as rust), improve wear resistance, electrical conductivity, reflective properties, corrosion resistance (copper sulfate, etc.) and enhance the appearance. [0003] Cyanide is a kind of inorganic compound with super strong complexing ability and surface activity. It is mainly obtained by using the super strong complexing ability of CN- ions and most metal ions to improve the cathodic polarization of metal ion discharge reduction. Uniform and dense metal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/22
CPCC25D3/22
Inventor 潘璐洁黄海宾
Owner 浙江金欣新材料科技股份有限公司
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