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Acidic brightener and preparation method thereof

A brightener and acidic technology, which is applied in the field of acidic brightener and its preparation, can solve the problems of poor corrosion resistance and discoloration resistance, narrow range of bright current density, poor dispersion ability of plating solution, etc. Good liquid dispersion ability and wide current density range

Inactive Publication Date: 2020-08-21
上海涤宝科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Brighteners are the key to determining the effect of galvanizing. Traditional brighteners have disadvantages such as narrow range of bright current density, poor dispersion of plating solution, rough surface, poor corrosion resistance and discoloration resistance, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An acidic brightener, said acidic brightener comprises the following raw material components in parts by weight: 2 parts of selenium dioxide, 2 parts of chlorobenzaldehyde, 4 parts of sodium dodecylsulfonate, methylene dinaphthalene sulfonate 5 parts of sodium nitrate, 5 parts of polyoxyethylene octylphenol ether-10, 5 parts of nicotinic acid, 0.6 parts of benzotriazole, 1 part of NNO, 2 parts of polyethylene glycol 200, and 35 parts of water.

[0028] The preparation method of above-mentioned acid brightener, step is as follows:

[0029] S1. Take 2 / 5 of the water and add benzotriazole to dissolve at 80°C, set aside;

[0030] S2. Add selenium dioxide, sodium dodecyl sulfonate, sodium methylene dinaphthalene sulfonate, polyoxyethylene octylphenol ether-10, nicotinic acid, NNO, polyethylene glycol to the remaining 3 / 5 of the water Alcohol is dissolved, and o-chlorobenzaldehyde is added thereto;

[0031] S3. Add the product prepared in step S1 to the product prepared in ...

Embodiment 2

[0033] A kind of acid brightener, described acid brightener comprises the raw material component of following parts by weight: 1.5 parts of selenium dioxide, 2.5 parts of chlorobenzaldehyde, 5 parts of sodium dodecylsulfonate, methylene dinaphthalene sulfonate 3 parts of sodium nitrate, 106 parts of polyoxyethylene octylphenol ether, 6 parts of niacin, 0.6 parts of benzotriazole, 1 part of NNO, 2 parts of polyethylene glycol 200, and 35 parts of water.

[0034] The preparation method of above-mentioned acid brightener, step is as follows:

[0035] S1. Take 2 / 5 of the water and add benzotriazole to dissolve at 80°C, set aside;

[0036] S2. Add selenium dioxide, sodium dodecyl sulfonate, sodium methylene dinaphthalene sulfonate, polyoxyethylene octylphenol ether-10, nicotinic acid, NNO, polyethylene glycol to the remaining 3 / 5 of the water Alcohol is dissolved, and o-chlorobenzaldehyde is added thereto;

[0037] S3. Add the product prepared in step S1 to the product prepared i...

Embodiment 3

[0039] An acidic brightener, said acidic brightener comprises the following raw material components in parts by weight: 1 part of selenium dioxide, 3 parts of chlorobenzaldehyde, 3 parts of sodium dodecylsulfonate, 3 parts of methylene dinaphthalene sulfonate 4 parts of sodium nitrate, 4 parts of polyoxyethylene octylphenol ether-10, 7 parts of niacin, 0.6 parts of benzotriazole, 1 part of NNO, 2 parts of polyethylene glycol 200, and 35 parts of water.

[0040] The preparation method of above-mentioned acid brightener, step is as follows:

[0041] S1. Take 2 / 5 of the water and add benzotriazole to dissolve at 80°C, set aside;

[0042] S2. Add selenium dioxide, sodium dodecyl sulfonate, sodium methylene dinaphthalene sulfonate, polyoxyethylene octylphenol ether-10, nicotinic acid, NNO, polyethylene glycol to the remaining 3 / 5 of the water Alcohol is dissolved, and o-chlorobenzaldehyde is added thereto;

[0043] S3. Add the product prepared in step S1 to the product prepared i...

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PUM

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Abstract

The invention discloses an acidic brightener and a preparation method thereof, and relates to the technical field of brighteners. The acidic brightener comprises the following raw material componentsin parts by weight: 1-2 parts of selenium dioxide, 2-3 parts of o-chlorobenzaldehyde, 10-20 parts of a surfactant, 5-7 parts of nicotinic acid, 0.5-0.8 part of benzotriazole, 1-2 parts of NNO, 1-2 parts of polyethylene glycol 200 and 30-40 parts of water. The acidic brightener provided by the invention has excellent covering power after being added into a plating solution, and a plating layer is bright and delicate, good in corrosion resistance and color change resistance, wide in current density range and good in dispersing power of the plating solution; according to the formula, selenium dioxide and o-chlorobenzaldehyde are used as main brighteners for compounding, so that the use amount of o-chlorobenzaldehyde is reduced, the use amount of a cosolvent is correspondingly reduced, and theenvironmental pollution is reduced. The preparation method of the acidic brightener is simple to operate, is suitable for industrial application, and saves the cost.

Description

technical field [0001] The invention relates to the technical field of brighteners, in particular to an acidic brightener and a preparation method thereof. Background technique [0002] Electrogalvanizing is a common process used to prevent steel objects from being corroded, improve corrosion resistance and service life. Galvanizing is protective as well as decorative, improving the appearance of a product. The traditional galvanizing process is realized by cyanide zinc plating solution, which is widely used because of its simple composition, stable plating solution and easy maintenance. However, the cyanide galvanizing solution is toxic and seriously pollutes the environment, and post-treatment is difficult, so the cyanide galvanizing solution is gradually eliminated. At present, the cyanide-free galvanizing process has been developed and replaced the cyanide galvanizing process. [0003] The cyanide-free galvanizing process includes the potassium chloride galvanizing pro...

Claims

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Application Information

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IPC IPC(8): C25D3/22
CPCC25D3/22
Inventor 张海超
Owner 上海涤宝科技有限公司