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Zinc plating liquid used for forming thick zinc coating as well as preparation method and application

A technology of galvanized layer and galvanized solution, which is applied in the field of galvanized solution and preparation and application for forming thick galvanized layer, can solve the problems of limiting the application range of galvanized layer, etc., and achieve the improvement of working range and improved dispersion capacity, hydrogen embrittlement" problem containment effect

Inactive Publication Date: 2015-07-29
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This limits the scope of application of the galvanized layer to a certain extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A galvanizing solution for forming a thick galvanized layer, calculated per liter, its raw material composition and content are as follows:

[0033] Zinc chloride 60g / L

[0034] Potassium chloride 200g / L

[0035] Boric acid 30g / L

[0036] Combined brightener 10g / L

[0037] Softener 0.2g / L

[0038] Organic solvent 5mL / L

[0039] The remainder is water;

[0040] In the combined brightener, calculated by mass ratio, benzylidene acetone: sodium benzoate: Pingping is 2:3:17;

[0041] The softening agent is a rare earth additive, and the rare earth additive is lanthanum chloride;

[0042] The organic solvent is ethanol.

[0043] Above-mentioned a kind of preparation method that is used to form the galvanized liquid of thick galvanized layer, specifically comprises the steps:

[0044] Dissolve zinc chloride, potassium chloride, boric acid, combined brightener and softener with a small amount of water first, then add an organic solvent and mix them evenly, and then make...

Embodiment 2

[0069] A galvanizing solution for forming a thick galvanized layer, calculated per liter, its raw material composition and content are as follows:

[0070] Zinc chloride 80g / L

[0071] Potassium chloride 180g / L

[0072] Boric acid 20g / L

[0073] Combined brightener 20g / L

[0074] Softener 0.8g / L

[0075] Organic solvent 1mL / L

[0076] The remainder is water;

[0077] In the combined brightener, calculated by mass ratio, benzylidene acetone: sodium benzoate: Pingping is 2:4:9;

[0078] The softening agent is a rare earth additive, and the rare earth additive is cerium chloride;

[0079] Described organic solvent is butyl ether.

[0080] Above-mentioned a kind of preparation method that is used to form the galvanized liquid of thick galvanized layer, specifically comprises the steps:

[0081] Dissolve zinc chloride, potassium chloride, boric acid, combined brightener and softener with a small amount of water first, then add an organic solvent and mix them evenly, and the...

Embodiment 3

[0089] A galvanizing solution for forming a thick galvanized layer, calculated per liter, its raw material composition and content are as follows:

[0090] Zinc chloride 100g / L

[0091] Potassium chloride 220g / L

[0092] Boric acid 35g / L

[0093] Combined brightener 15g / L

[0094] Softener 1.2g / L

[0095] Organic solvent 20mL / L

[0096] The remainder is water;

[0097] In the combined brightener, calculated by mass ratio, benzylidene acetone: sodium benzoate: Pingping is 2:4:9;

[0098] The softening agent is a rare earth additive, and the rare earth additive is cerium chloride;

[0099] Described organic solvent is ethylene glycol methyl ether.

[0100] Above-mentioned a kind of preparation method that is used to form the galvanized liquid of thick galvanized layer, specifically comprises the steps:

[0101] Dissolve zinc chloride, potassium chloride, boric acid, combined brightener and softener with a small amount of water first, then add an organic solvent and mix t...

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Abstract

The invention discloses zinc plating liquid used for forming a thick zinc coating as well as a preparation method and application. 1 L of zinc plating liquid used for forming the thick zinc coating comprises the following ingredients: 60-100 g of zinc chloride, 180-220 g of potassium chloride, 20-35 g of boric acid, 10-20 g of a combined brightener, 0.2-1.2 g of a softening agent, 1-20 mL of an organic solvent and the balance of water. The preparation method comprises the followings steps: dissolving zinc chloride, potassium chloride, boric acid, the combined brightener and the softening agent with a small amount of water, adding the organic solvent, uniformly mixing, and diluting with water so as to form the zinc plating liquid used for forming the thick zinc coating. When the zinc plating liquid used for forming the thick zinc coating is electroplated for 15-120 min under the current density of 1-15 A / dm<2>, the zinc coating with the thickness of 34-100 [mu]m can be obtained on the surface of a metallic matrix, and is compact, uniform, bright and crack-free.

Description

technical field [0001] The invention relates to a galvanizing solution for forming a thick galvanized layer, a preparation method and an application. Background technique [0002] For a long time in the past, the cyanide galvanizing process has been widely used because of the good stability of the cyanide plating solution, strong throwing ability, fine coating, and good corrosion resistance. However, due to the severe hydrogen evolution in the cyanide galvanizing process, the galvanized layer is very brittle, and the cyanide galvanizing solution is highly toxic, the wastewater treatment is difficult, and the air and groundwater are seriously polluted. Galvanizing and weak acid galvanizing processes are gradually developed and used in industrial electroplating to replace cyanide galvanizing. Compared with the cyanide galvanizing process, the destructive power of the alkaline galvanizing process to the environment is greatly reduced, but the current efficiency of the plat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/22
CPCC25D3/22
Inventor 万传云吴伟权张甜甜
Owner SHANGHAI INST OF TECH
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