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Preparation method of alkaline zincate zinc-plating brightener

A zincate galvanizing and brightener technology, which is applied in the field of brightener preparation, can solve the problems of dark surface, roughness, and narrow range of bright current density of the coating, and achieve wide range of current density, smooth surface, and improved bright current Effect of Density Range

Inactive Publication Date: 2012-12-19
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of an alkaline zincate galvanizing brightener in order to solve the problems of narrow bright current density range, dark coating and rough surface of the existing zincate galvanizing additives

Method used

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  • Preparation method of alkaline zincate zinc-plating brightener
  • Preparation method of alkaline zincate zinc-plating brightener
  • Preparation method of alkaline zincate zinc-plating brightener

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specific Embodiment approach 1

[0011] Specific embodiment one: the preparation method of a kind of alkaline zincate galvanized brightener of the present embodiment is carried out according to the following steps: take 12~15g of dimethylamine that the mass percentage content is 33% and add to four ports bottle, and then heated to 23°C, using the dropping funnel to drop all 12-15g of epichlorohydrin into the four-necked bottle at a speed of 3-4 s / drop, and then raised the temperature to 25°C-30 ℃, after reacting for 1.5~2.5h, add 0.1~1g of tetraethylenepentamine dropwise into the four-necked bottle at a speed of 7~8s / drop, and then raise the temperature to 65℃~75℃ after the dropwise addition, and react 4 After ~5h, the alkaline zincate galvanizing brightener is obtained.

[0012] The alkaline zincate galvanizing brightener prepared in this embodiment has a wide range of current density. Adding a carrier brightener to the plating solution can cooperate well with the main brightener, improve cathode polarizatio...

specific Embodiment approach 2

[0013] Embodiment 2: This embodiment differs from Embodiment 1 in that: 13 g of dimethylamine with a mass percent content of 33% is added to the four-necked bottle. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0014] Embodiment 3: The difference between this embodiment and Embodiments 1 to 2 is that all 13 g of epichlorohydrin is added dropwise into the four-necked bottle. Others are the same as the specific embodiment 1 to 2.

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Abstract

The invention discloses a preparation method of an alkaline zincate zinc-plating brightener and relates to a preparation method of a brightener, and the preparation method is used for solving the problems that the existing zincate zinc-plating brightener is narrow in bright current density range, dark in plating layer and rough in surface. The preparation method comprises the following steps of: adding 12-15g of 33wt% dimethylamine into a four-neck bottle; then heating to 23 DEG C, completely dropwise adding 12-15g of epichlorohydrin into the four-neck bottle at the speed of 3-4s / drop; after dropwise adding is finished, heating to 25 DEG C-30 DEG C, reacting for 1.5-2.5 hours, and completely dropwise adding 0.1-1g of tetraethylenepentamine into the four-neck bottle; and after dropwise adding is finished, heating to 65 DEG C-75 DEG C, and reacting for 4-5 hours, so as to obtain the alkaline zincate zinc-plating brightener. The current density of the alkaline zincate zinc-plating brightener disclosed by the invention is 0.5-10.73A / dm<2>. The alkaline zincate zinc-plating brightener disclosed by the invention is applied to the field of zinc electroplating.

Description

technical field [0001] The invention relates to a preparation method of a brightener. Background technique [0002] Electro-galvanizing is a steel protection method widely used at home and abroad. It has been widely used in many fields such as shipbuilding industry, machinery industry, aviation, construction, and household appliances due to its good corrosion resistance and low price. Electro-galvanizing The actual application system is divided into cyanide galvanizing and cyanide-free galvanizing. With the continuous strengthening of the country's environmental protection requirements, the traditional cyanide galvanizing is gradually eliminated. Because the environmental protection zincate galvanizing solution has simple plating solution components, Low operating costs, long equipment life and other obvious advantages, so the current galvanizing system is mainly dominated by the alkaline zincate galvanizing system, the choice of galvanizing additives is the main factor dete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/22
Inventor 李丽波王佳佳国绍文
Owner HARBIN UNIV OF SCI & TECH
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