Phosphorus-free degreaser for surface spraying pretreatment of steel

A technology of steel surface and degreasing agent, which is used in the field of pre-treatment agent for spraying steel surface, can solve the problems of affecting degreasing effect, cleaning degree, strong foam stability, etc., and achieve good degreasing effect, less foam and strong degreasing ability. Effect

Active Publication Date: 2013-06-12
湖南中皖骏环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the degreasing agent formula generally contains sodium alkylbenzene sulfonate. Although it has strong emulsifying power and degreasing power, the foam stability is too strong and it is combined with calcium and magnesium ions in water. Calcium salt that is difficult to dissolve in water, Affect degreasing effect and cleanliness

Method used

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  • Phosphorus-free degreaser for surface spraying pretreatment of steel
  • Phosphorus-free degreaser for surface spraying pretreatment of steel
  • Phosphorus-free degreaser for surface spraying pretreatment of steel

Examples

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Effect test

Embodiment 1

[0020] A phosphorus-free degreasing agent for steel surface spraying pretreatment, a mixed solution prepared from the following components, the mass concentration of each component in the mixed solution is:

[0021]

[0022] The remaining ingredients are water.

[0023] Preparation method: The preparation method is: dissolve the above-mentioned anhydrous sodium metasilicate, sodium carbonate, and disodium edetate in tap water, stir and dissolve, add defoaming king FAG470, and then add dodecane while stirring Sodium phenyl benzene sulfonate, after dissolving, add fatty alcohol polyoxyethylene ether and isopropanol mixed solution while stirring.

Embodiment 2

[0025] A phosphorus-free degreasing agent for steel surface spraying pretreatment, a mixed solution prepared from the following components, the mass concentration of each component in the mixed solution is:

[0026]

[0027] The preparation method is: dissolve the above-mentioned anhydrous sodium metasilicate, sodium carbonate, and disodium edetate in tap water, stir and dissolve, add defoaming king FAG470, and then add dodecylbenzenesulfonate while stirring After dissolving, add fatty alcohol polyoxyethylene ether and isopropanol mixed solution while stirring.

Embodiment 3

[0029] A phosphorus-free degreasing agent for steel surface spraying pretreatment, a mixed solution prepared from the following components, the mass concentration of each component in the mixed solution is:

[0030]

[0031]

[0032] Preparation method: with embodiment 1.

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PUM

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Abstract

The invention relates to a steel surface spraying process, and particularly relates to a steel surface spraying pretreatment agent. The phosphorus-free degreaser for surface spraying pretreatment of steel is a mixed solution prepared from the following components in mass concentration: 15-30 g/L anhydrous sodium metasilicate, 5-10 g/L sodium carbonate, 4-6 g/L alkylphenol ether sulfosuccinate sodium salt, 2-4 g/L sodium lauryl sulfate, 5-10 g/L fatty alcohol-polyoxyethylene ether, 2-4 g/L isopropanol, 0.2-0.4 g/L defoaming agent FAG470, 0.5-2.5 g/L disodium edetate and the balance of water. The invention can realize thorough degreasing at normal temperature, and is easy to perform cleaning operation and low in foam.

Description

technical field [0001] The invention relates to a steel surface spraying process, in particular to a steel surface spraying pretreatment agent. Background technique [0002] At present, most of the degreasing agents used in the pre-treatment of steel surface spraying in the industry have high treatment temperatures and contain phosphates that will aggravate the eutrophication of water bodies, which affect the environment; while non-phosphorus degreasing agents contain sodium hydroxide, which has poor cleaning performance after degreasing, Sodium orthosilicate, or the amount of surfactant is too high, there are problems of incomplete cleaning or excessive foam. [0003] In the prior art, the degreasing agent formula generally contains sodium alkylbenzene sulfonate. Although it has strong emulsifying power and degreasing power, the foam stability is too strong and it is combined with calcium and magnesium ions in water. Calcium salt that is difficult to dissolve in water, Aff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/19
Inventor 朱海斌
Owner 湖南中皖骏环保科技有限公司
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