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Electro-galvanizing brightening agent

A brightener and electro-galvanizing technology, which is applied in the field of brighteners for electro-galvanizing, can solve the problems of not being widely used and poor brightness of zinc coating, and achieve the effect of solving serious equipment corrosion and brightening

Inactive Publication Date: 2017-02-22
JIANGSU MENGDE NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alkaline galvanizing solves the corrosion problem of acid galvanizing equipment, but the zinc coating obtained by the alkaline electro-galvanizing process has poor brightness and has not been widely used.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Add 51% of 1-benzylpyridinium-3-carboxylate, 21% of choline chloride, 14% of urea, and 14% of 2.4-dichlorobenzaldehyde into the reaction kettle and stir evenly, then press Add 40% sodium hydroxide solution with a mass fraction of 500ml / L, adjust the pH value to 7.0, heat to 75°C, keep warm for 1 hour and then drop to room temperature, filter through a filter, and then filter the precipitated material Put it into the drying machine for drying, and then put it into the drying machine for drying, that is, the finished brightener.

Embodiment 2

[0015] Add 49% of 1-benzylpyridinium-3-carboxylate, 19% of choline chloride, 16% of urea, and 16% of 2.4-dichlorobenzaldehyde into the reaction kettle and stir evenly, then press Add 40% sodium hydroxide solution with a mass fraction of 400ml / L, adjust the pH value to 6.5, heat to 70°C, keep warm for 1 hour and then drop to room temperature, filter through a filter, and then filter the precipitated material Put it into the drying machine for drying, and then put it into the drying machine for drying, that is, the finished brightener.

Embodiment 3

[0017] Add 50% of 1-benzylpyridinium-3-carboxylate, 20% of choline chloride, 15% of urea, and 15% of 2.4-dichlorobenzaldehyde into the reaction kettle and stir evenly, then press Add sodium hydroxide solution with a mass fraction of 40% at a ratio of 450ml / L, adjust the pH value to 6.8, heat to 72°C, keep warm for 1 hour and then drop to room temperature, filter through a filter, and then filter the precipitated material Put it into the drying machine for drying, and then put it into the drying machine for drying, that is, the finished brightener.

[0018] The beneficial effects of the invention are: solving the problem of bright alkaline electro-galvanized zinc coating, thereby solving the problem of severe corrosion of equipment by acidic electro-galvanized.

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PUM

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Abstract

An electro-galvanizing brightening agent is characterized by comprising, in weight percentage, 49%-51% of 1-benzyl pyridinium-3-carboxylate, 19%-21% of choline chloride, 14%-16% of urea and 14%-16% of 2.4-dichlorobenzaldehyde. The electro-galvanizing brightening agent solves the problem of poor brightness of an alkaline electro-galvanized coating, and accordingly solves the problem that equipment is seriously corroded by current acid electro-galvanizing.

Description

technical field [0001] The invention relates to the field of electroplating, in particular to a brightener for electrogalvanizing. [0002] technical background [0003] Zinc coating is anti-corrosion, non-toxic and weldable, and is widely used in various industrial fields, especially the electronic industry. Due to restrictions on heavy metals such as hexavalent chromium and cadmium, the galvanizing industry has been more widely used. The current electro-galvanizing process basically adopts the acid galvanizing process, which has the problem of serious corrosion to equipment. Alkaline galvanizing solves the corrosion problem of acid galvanizing on equipment, but the zinc coating obtained by the alkaline electro-galvanizing process has poor brightness and has not been widely used. [0004] In view of the above-mentioned defects, this designer actively researches and innovates in order to create a brightener for electro-galvanizing, so that it has more industrial utilization...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/22
CPCC25D3/22
Inventor 杭冬良
Owner JIANGSU MENGDE NEW MATERIALS TECH CO LTD
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