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Preparation method of descaling cleaning solution for stainless steel cold drawn pipes

A cold-drawn tube and cleaning liquid technology, which is applied in the field of chemical cleaning, can solve the problems of difficult cleaning, air pollution, human body harm, etc., and achieves the effects of good cleaning effect, maintaining gloss and saving costs.

Inactive Publication Date: 2014-10-01
JIANGSU HUACHENG IND PIPES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the cleaning of stainless steel cold-drawn tubes is difficult to control. In order to remove the sintered matter and dirt inside and outside the tubes, the traditional method is to use nitric acid and hydrofluoric acid for heating. The smaller the tube, the more difficult it is to clean.
Strong acid is highly corrosive to the surface of stainless steel cold-drawn tubes. Often the outside of the tube has been cleaned, but the sintered matter inside the tube has not fallen off. After a long time, the sintered matter in the tube has fallen off, and the outside of the tube has been severely corroded; and due to nitric acid and hydrogen Fluoric acid is heated to produce acid mist, which not only has great harm to the human body, but also seriously pollutes the air, and the discharge of waste acid water also seriously pollutes water resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A preparation method of stainless steel cold-drawn pipe descaling cleaning liquid, has the following steps: (1), under normal temperature, add the water that is 585 kilograms by weight percentage in mixer; (2), add content 99.3% citric acid while stirring 50 kilograms; (3), 100 kilograms of content 99.6% oxalic acid while stirring; (4), 4 kilograms of 99% sodium molybdate of content while stirring; (5), 70 kilograms of content 85% triethanolamine while stirring (6), throw in 110 kilograms of JFC penetrants while stirring; (7), throw in 15 kilograms of emulsifier OP-10 while stirring; (8), throw in 15 kilograms of content 25% hydrochloric acid while stirring; (9) (10), throw in 30 kilograms of ethanol while stirring; (11), put in 15 kilograms of 90% hydrofluoric acid while stirring; (12), after all the feeding is finished, Stirring for 20-30 minutes is the finished product.

Embodiment 2

[0051] A preparation method of stainless steel cold-drawn pipe descaling and cleaning solution, which has the following steps: (1), at normal temperature, add water with a weight percentage of 170 kg in the mixer; (2), add citric acid with a content of 99.3% while stirring 100 kilograms; (3), 200 kilograms of content 99.6% oxalic acid while stirring; (4), 8 kilograms of content 99% sodium molybdate while stirring; (5), 140 kilograms of content 85% triethanolamine while stirring (6), throw in 220 kilograms of JFC penetrants while stirring; (7), throw in 30 kilograms of emulsifier OP-10 while stirring; (8), throw in 30 kilograms of content 25% hydrochloric acid while stirring; (9) (10), throw in 60 kilograms of ethanol while stirring; (11), throw in 30 kilograms of 90% hydrofluoric acid while stirring; (12), after all the feeding is finished, Stirring for 20-30 minutes is the finished product.

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PUM

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Abstract

The invention discloses a preparation method of a descaling cleaning solution suitable for stainless steel cold drawn pipes. The descaling cleaning solution is prepared by mixing the following raw materials by weight percent under normal temperature: 17-58.5% of water, 5-10% of citric acid, 10-20% of oxalic acid, 0.4-0.8% of sodium molybdate, 7-14% of triethanolamine, 11-22% of fatty alcohol polyoxyethylene ether, 1.5-3% of alkylphenol polyoxyethylene ether, 1.5-3% of hydrochloric acid, 0.6-1.2% of sodium tripolyphosphate, 3-6% of ethanol and the balance of hydrofluoric acid. The descaling cleaning solution is simple to operate, dispenses with heating, has good cleaning effects, simultaneously does not corrode the surface of stainless steel, maintains the glossiness of stainless steel, can be reused, does not hurt the skins when coming into contact with the skins, is low-carbon and environment-friendly and saves cost.

Description

technical field [0001] The invention relates to the technical field of chemical cleaning, in particular to a preparation method suitable for descaling and cleaning liquid of stainless steel cold-drawn pipes. Background technique [0002] At present, the cleaning of stainless steel cold-drawn tubes is difficult to control. In order to remove the sintered matter and dirt inside and outside the tubes, the traditional method is to use nitric acid and hydrofluoric acid for heating. The smaller the tube, the more difficult it is to clean. Strong acid is highly corrosive to the surface of stainless steel cold-drawn tubes. Often the outside of the tube has been cleaned, but the sintered matter inside the tube has not fallen off. After a long time, the sintered matter in the tube has fallen off, and the outside of the tube has been severely corroded; and due to nitric acid and hydrogen Fluoric acid is heated to produce acid mist, which not only has great harm to the human body, but a...

Claims

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Application Information

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IPC IPC(8): C23G1/08
Inventor 周金苗
Owner JIANGSU HUACHENG IND PIPES