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Neutral rust remover and preparation method thereof

A rust remover, neutral technology, used in the field of metal surface rust removal, can solve the problems of metal mechanical properties decline, human injury, metal hydrogen embrittlement, etc., to achieve good coating adhesion, energy saving, good corrosion resistance. Effect

Inactive Publication Date: 2018-01-19
宁波际超新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

What these products have in common is that they are all derusted in a strong acidic atmosphere. Strong acidic derusting agents not only pollute the environment, easily form acid mist, do great harm to the human body, but also cause "hydrogen embrittlement" to metals. Causes the mechanical properties of the metal to decline and damages the overall firmness of the metal
[0004] At present, there are some neutral rust removers in the market, but the rust removal speed is far from the requirement, and the rust removal treatment temperature is required to be higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A neutral rust remover, made from the following raw materials in parts by weight: 130 parts of hydroxyethylidene diphosphonic acid, 1 part of sodium chloride, 0.4 part of potassium oxalate, 0.4 part of formic acid, 0.4 part of phytic acid, 1 part of citric acid 0.4 parts of ethylenediaminetetraacetic acid, 3 parts of organic amine ester TPP.

[0029] The organic amine ester TPP in this embodiment is selected from the organic amine ester TPP surfactant produced by Shenzhen Xinwei Technology Co., Ltd.

[0030] The preparation method of the neutral rust remover: Weigh the raw materials in the above parts by weight, first mix the hydroxyethylidene diphosphonic acid and the organic amine ester TPP, stir well, and then add sodium chloride, potassium oxalate, ethylenediamine Tetraacetic acid, fully stirred evenly, then add phytic acid, citric acid, formic acid, stir evenly, finally add potassium hydroxide, adjust pH to 6-7, and obtain neutral rust remover.

Embodiment 2

[0032] A neutral rust remover, made from the following raw materials in parts by weight: 140 parts of hydroxyethylidene diphosphonic acid, 1.5 parts of potassium chloride, 0.7 parts of potassium oxalate, 0.7 parts of formic acid, 0.7 parts of phytic acid, 1.5 parts of citric acid Parts, 0.7 parts of ethylenediaminetetraacetic acid, 4 parts of organic amine ester TPP.

[0033] The organic amine ester TPP in this embodiment is selected from the organic amine ester TPP surfactant produced by Shenzhen Xinwei Technology Co., Ltd.

[0034] The preparation method of the neutral rust remover: Weigh the raw materials in the above parts by weight, first mix the hydroxyethylidene diphosphonic acid and the organic amine ester TPP, stir well, and then add sodium chloride, potassium oxalate, ethylenediamine Tetraacetic acid, fully stirred evenly, then add phytic acid, citric acid, formic acid, stir evenly, finally add potassium hydroxide, adjust pH to 6-7, and obtain neutral rust remover. ...

Embodiment 3

[0036] A neutral rust remover, made from the following raw materials in parts by weight: 150 parts of hydroxyethylidene diphosphonic acid, 1 part of sodium chloride, 1 part of potassium chloride, 1 part of potassium oxalate, 1 part of formic acid, phytic acid 1 part, 2 parts of citric acid, 1 part of ethylenediaminetetraacetic acid, 5 parts of organic amine ester TPP.

[0037] The organic amine ester TPP in this embodiment is selected from the organic amine ester TPP surfactant produced by Shenzhen Xinwei Technology Co., Ltd.

[0038] The preparation method of the neutral rust remover: Weigh the raw materials in the above parts by weight, first mix the hydroxyethylidene diphosphonic acid and the organic amine ester TPP, stir well, and then add sodium chloride, potassium oxalate, ethylenediamine Tetraacetic acid, fully stirred evenly, then add phytic acid, citric acid, formic acid, stir evenly, finally add potassium hydroxide, adjust pH to 6-7, and obtain neutral rust remover. ...

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Abstract

The invention discloses a neutral rust remover and relates to the technical field of metal surface rust removal. The neutral rust remover is prepared from, by weight, 130-170 parts of hydroxy ethidenediphosphonic acid, 1-3 parts of sodium chloride and / or potassium chloride, 0.4-1.6 parts of potassium oxalate 0.4-1.6 parts of formic acid, 0.4-1.6 parts of phytic acid, 1-3 parts of citric acid, 0.4-1.6 parts of ethylenediaminetetraacetic acid and 3-7 parts of organic amine ester TPP. The invention further discloses a preparation method of the neutral rust remover. By the adoption of the neutralrust remover and the preparation method, the rust removal speed under the normal temperature is high, the rust removal effect is good, and secondary rusting time is long; meanwhile the rust remover is neutral, free of damage to a base body and free of influence on strength and ductility and malleability of metal; and all the components are environmentally-friendly, free of toxin, smoke and pungent odors, free of pollution to the environment and free of harm to the human body.

Description

technical field [0001] The invention relates to the technical field of rust removal on metal surfaces, in particular to a neutral rust remover. Background technique [0002] Corrosion is one of the main forms of damage to metal products. According to statistics, the annual direct economic loss caused by metal corrosion accounts for about 2% to 4% of the total output value of the national economy, especially the corrosion of steel products is more serious. In order to avoid corrosion and reduce losses, metal processing, machinery manufacturing and other industries generally use rust removers to treat the processed metal surface before spraying, electroplating, plastic spraying and other processes to improve the adhesion of the coating film and prevent rust. sex. [0003] Most of the existing rust removers are composed of inorganic acids, organic acids, salts, corrosion inhibitors, surfactants and water, or sulfuric acid and various anion and cationic surfactants. What these...

Claims

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Application Information

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IPC IPC(8): C23G1/26
Inventor 李啸春李春山校新克彭志坤李春超
Owner 宁波际超新材料科技有限公司
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