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Zincate zinc-plating brightener

A zincate galvanizing and brightener technology, which is applied in the field of metal processing, can solve problems such as the speed and brightness of the light are not up to the standard, the environmental protection requirements of metal processing are not met, the quality of the coating, the brightness is not enough, etc., to achieve good economy Benefits, enhanced stability, improved brightness effects

Inactive Publication Date: 2019-07-02
DALIAN BETRUST ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of processing and manufacturing metal products, metal protection is often achieved by electro-galvanizing. Because electro-galvanizing has the advantages of low cost and significant anti-corrosion effect, it has been widely used. At present, most of the electro-galvanizing products used in this field contain cyanide The large-scale use of compounds and cyanides does not meet my country's environmental protection requirements for metal processing
In addition, triethanolamine is used as an additive in existing electroplating galvanizing reagents, and triethanolamine will lead to defects such as insufficient coating quality and brightness, and poor throwing ability.
However, the use of epichlorohydrin-based brighteners has the problem that the speed and brightness of the light cannot reach the standard.

Method used

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  • Zincate zinc-plating brightener

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Take 22 parts of aminodimethyl methane and add it into a four-neck round bottom flask, then heat it to 24°C, slowly add 15.5 parts of 2.4-dichlorobenzaldehyde dropwise, after the dropwise addition, raise the temperature to 25°C, and react for 3 hours to obtain mid product;

[0022] (2) Add 32.5 parts of zinc chloride and 27 parts of boric acid to the intermediate product, heat to 76°C while stirring, react for 4 hours, separate layers, and take the upper organic phase.

[0023] (3) Add 6 parts of polyethylene glycol monododecyl ether and 1.8 parts of sodium citrate to the organic phase, stir and react at 82° C. for 4 hours, and cool to room temperature to obtain zincate galvanized brightener.

Embodiment 2

[0025] (1) Take 25 parts of aminodimethyl methane and add it into a four-neck round bottom flask, then heat it to 25°C, slowly add 16 parts of 2.4-dichlorobenzaldehyde dropwise, after the dropwise addition, raise the temperature to 28°C, and react for 1-3h , to get the intermediate product;

[0026] (2) Add 30 parts of zinc chloride and 26 parts of boric acid to the intermediate product, heat to 80°C while stirring, react for 3.5 hours, separate layers, and take the upper organic phase.

[0027] (3) Add 5.5 parts of polyethylene glycol monododecyl ether and 1.5 parts of sodium citrate to the organic phase, stir and react at 80° C. for 4 hours, and cool to room temperature to obtain a zincate galvanizing brightener.

Embodiment 3

[0029] (1) Take 30 parts of aminodimethyl methane and add it into a four-neck round bottom flask, then heat it to 24°C, slowly add 17 parts of 2.4-dichlorobenzaldehyde dropwise, after the dropwise addition, raise the temperature to 25°C, and react for 3 hours to obtain mid product;

[0030] (2) Add 28 parts of zinc chloride and 25 parts of boric acid to the intermediate product, heat to 68°C while stirring, react for 4 hours, separate layers, and take the upper organic phase.

[0031] (3) Add 8 parts of polyethylene glycol monododecyl ether and 3 parts of sodium citrate to the organic phase, stir and react at 80° C. for 5 hours, and cool to room temperature to obtain zincate galvanized brightener.

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Abstract

The invention relates to a zincate zinc-plating brightener. The zincate zinc-plating brightener is prepared from the components by parts: 20-30 parts of amino dimethane, 28-35 parts of zinc chloride,25-30 parts of boric acid, 14-17 parts of 2.4-dichlorobenzaldehyde, 5-8 parts of polyethylene glycol single dodecane ether and 1-3 parts of sodium citrate. According to the zincate zinc-plating brightener, the sodium citrate and the polyethylene glycol single dodecane ether are added to the brightener to enhance stability of a system, the amino dimethane and the 2.4-dichlorobenzaldehyde are added,thus the brightener has the wide current density range, the zinc chloride and the boric acid are added to improve the polarization action of the brightener, the brightener does not contain addition agents of aromatic hydrocarbon and amine, environmental protection is achieved, safety and non-toxicity are achieved, performance is stable, a plating layer is uniform and compact, brightness of metalsis improved, the preparation technology is simple, the cost of raw materials is low, and the brightener has good economic benefit.

Description

technical field [0001] The invention belongs to the field of metal processing, and in particular relates to a zincate galvanizing brightener. Background technique [0002] During the processing and manufacturing of metal products, metal protection is often realized by electro-galvanizing. Because electro-galvanizing has the advantages of low cost and significant anti-corrosion effect, it has been widely used. At present, most of the electro-galvanizing products used in this field contain cyanide The large-scale use of compounds and cyanides does not meet my country's environmental protection requirements for metal processing. In addition, triethanolamine is used as an additive in existing electro-galvanizing reagents, and triethanolamine will lead to defects such as insufficient coating quality and brightness, and poor throwing ability. And adopt the brightener of epichlorohydrin class, there is the problem that light speed and brightness are not up to standard. Therefore, ...

Claims

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Application Information

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IPC IPC(8): C25D3/22
CPCC25D3/22
Inventor 邓金玲
Owner DALIAN BETRUST ENVIRONMENTAL PROTECTION TECH CO LTD
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