Low temperature electrolytic cleaning agent particularly suitable for secondary cold-rolled steel strip

A technology of secondary cold rolling and electrolytic cleaning, which is applied in the field of low-temperature cleaning agents, can solve problems such as difficulty in escaping hydrogen and oxygen, increased evaporation speed of alkali solution, and increased foam of alkali washing solution, and achieves long service life and oil removal Fast speed and strong degreasing ability

Inactive Publication Date: 2011-07-20
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The temperature is high, the heat consumption increases, the lye evaporation speed increases, and the environment is polluted
On the other hand, the foam of the alkaline washing solution increases, which makes it difficult for the hydrogen and oxygen generated in the electrolytic cleaning process to escape. If they are mixed in the foam layer, it is easy to explode
At the same time, it is easy to cause the degreasing liquid to return in a hurry and overflow from the tank, which increases the cost consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: get sodium hydroxide 30% by weight percentage, sodium carbonate 20%, sodium lauryl sulfonate 20%, trade name FSWET-1010 fluorine element wetting agent 5% (Du Pont Company produces), fatty alcohol polysaccharide Oxyethylene ether 16%, sodium ethylenediamine tetraacetate 5%, trade name defoamer BX-838 4% (purchased from Shanghai Boyihe Chemical Co., Ltd.), after these raw materials are mixed uniformly, be mixed with tap water to concentration 2% solution, the cleaning temperature is 30°C, and the secondary cold-rolled strip steel with oily surface is electrolytically cleaned, and the current density is set at 20A / dm 2 , The cleaning time is 6 seconds, and the cleaning efficiency is over 99%.

Embodiment 2

[0018] Embodiment 2: get sodium hydroxide 20% by weight percentage, sodium carbonate 10%, sodium oxalate 10%, Remibang A 20%, dioctyl sodium sulfosuccinate 10%, fatty alcohol polyoxyethylene ether 12% , octylphenol polyoxyethylene ether 6%, sodium gluconate 5%, trade name defoamer BX-838 7% (purchased from Shanghai Boyihe Chemical Co., Ltd.), after these raw materials are evenly mixed, use tap water to prepare The concentration is 3% solution, the cleaning temperature is 35°C, and the secondary cold-rolled strip steel with oily surface is electrolytically cleaned, and the current density is set at 20A / dm 2 , The cleaning time is 4 seconds, and the cleaning efficiency is over 99%.

Embodiment 3

[0019] Embodiment 3: get sodium hydroxide 40% by weight percentage, sodium oxalate 10%, Remibang A 15%, dioctyl sodium sulfosuccinate 8%, alkylphenol polyoxyethylene polyoxypropylene ether 15%, Sodium citrate 8%, trade name defoamer BX-833 4% (purchased from Shanghai Boyihe Chemical Co., Ltd.), after these raw materials are evenly mixed, it is 3.5% solution that is mixed with tap water, and cleaning temperature is 35 ℃, electrolytic cleaning is carried out on the secondary cold-rolled strip steel with oily surface, and the current density is set at 20A / dm 2 , The cleaning time is 5 seconds, and the cleaning efficiency is over 99%.

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PUM

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Abstract

The invention relates to a low temperature electrolytic cleaning agent particularly suitable for secondary cold-rolled steel strips, and is mainly characterized in that the cleaning agent comprises the following components in percentage by weight: sodium hydroxide 20-40%, auxiliary cleaning agent 10-40%, moisture enhancing agent 5-10%, polyether emulsifier 5-30%, chelating agent 1-10%, and antifoaming agent 1-7%, the concentration of the cleaning agent during cleaning is 2-4.5%, and the temperature of the cleaning agent during cleaning is 30-40 DEG C. The cleaning agent can effectively remove the oil stains on the surface of secondary cold-rolled steel strips. The low temperature electrolytic cleaning agent provided by the invention has the advantages of low working temperature, rapid cleaning (the cleaning of the secondary cold-rolled steel strips is finished within 3-6 seconds), no scaling during use, low foam formation, and high stain removal capacity.

Description

technical field [0001] The invention relates to a chemical composition for removing oil stains on metal surfaces, in particular to a low-temperature cleaning agent especially suitable for electrolytic cleaning of secondary cold-rolled strip steel. Background technique [0002] Degreasing treatment is an indispensable and important link before cold-rolled strip steel is coated. This is because the surface of cold-rolled strip steel is covered with rolling oil, grease, iron powder and dust after rolling and annealing. If the cleaning is not clean, the dirt attached to the surface of the strip will not only damage the appearance, but also the main cause of quality defects in the electroplating process, especially for the coated steel plate, the surface layer will be uneven, and the corrosion resistance will be deteriorated. question. The purpose of electrolytic cleaning is to remove residues on the surface of strip steel after rolling, so that the strip steel can enter the nex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F1/06
Inventor 高发明于升学侯莉刘玉文
Owner YANSHAN UNIV
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