Preparing method of stainless steel cold drawn pipe cleaning working fluid

A technology of cold-drawn tubes and working fluids, applied in the field of chemical cleaning, which can solve problems such as difficult cleaning, air pollution, and human hazards, and achieve good cleaning effects, maintain gloss, and save costs

Inactive Publication Date: 2014-10-22
ZHANGJIAGANG HUACHENG LOCOMOTIVE PRECISION PIPE MFG
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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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Embodiment Construction

[0033] The present invention will now be further described. In the examples, fatty alcohol polyoxyethylene ether is JFC penetrating agent, and alkylphenol polyoxyethylene ether is emulsifier OP-10.

[0034] A preparation method for cleaning working fluid for stainless steel cold-drawn pipes, which has the following steps: (1) at normal temperature, adding water with a weight percentage of 576 kg in a mixer; (2) adding 99.3% citric acid 60% while stirring kg; (3), 80 kilograms of content 99.6% oxalic acid while stirring; (4), 6 kilograms of content 99% sodium molybdate while stirring; (5), 50 kilograms of content 85% triethanolamine while stirring; (6), throw in 120 kilograms of JFC penetrants while stirring; (7), throw in 20 kilograms of emulsifier OP-10 while stirring; (8), throw in 20 kilograms of content 31% hydrochloric acid while stirring; (9), Throw in 8 kilograms of sodium tripolyphosphate while stirring; (10), throw in 40 kilograms of ethanol while stirring; (11), thr...

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PUM

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Abstract

A preparing method of a stainless steel cold drawn pipe cleaning working fluid is disclosed. The method includes mixing following raw materials by weight at room temperature: 52.6-63.6% of water, 3-8% of citric acid, 5-10% of oxalic acid, 0.4-0.9% of sodium molybdate, 4-6% of triethanolamine, 9-15% of polyoxyethylene alkyl ether, 1.5-2.5% of alkylphenol polyoxyethylene, 1.0-2.5% of hydrochloric acid, 0.5-1.2% of sodium tripolyphosphate and 2-6% of ethanol, with the balance being hydrofluoric acid. The method has characteristics of simple operation, no need of heating, good cleaning effects, no corrosion to surfaces of stainless steel, and capability of maintaining glossiness of the stainless steel. The fluid can be repeatedly used, and is free of harm to skin when contacting skin, low-carbon, environmental friendly, and cost-saving.

Description

technical field [0001] The invention relates to the technical field of chemical cleaning, in particular to a method for preparing a working fluid suitable for cleaning 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 also se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/08
Inventor 许亚明常盛成
Owner ZHANGJIAGANG HUACHENG LOCOMOTIVE PRECISION PIPE MFG
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