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Phosphorus-free degreaser

A technology of degreasing agent and grease, which is applied in the field of rolling steel chemical industry, and can solve the problems of difficult sewage treatment, great environmental hazards, and high toxicity

Inactive Publication Date: 2015-06-10
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] By providing a phosphorus-free degreasing agent, the present invention solves the technical problem that the degreasing agent in the prior art has poor stability, high toxicity or great environmental damage, so the cleaned sewage is not easy to handle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 10% sodium hydroxide, 2% sodium carbonate, 2% sodium citrate, 2% sodium gluconate, 0.5% polyaspartic acid, 0.8% polyacrylic acid sodium salt, fatty alcohol ether non-ionic surfactant by weight Agent 0.8%, carboxylate anionic surfactant 0.8%, desalinated water 81.1%. After these raw materials are mixed evenly, the concentrated solution of the degreasing agent is made. When in use, dilute the concentrated solution into a working solution with a mass fraction of 3%. According to the standard method JB / T 4323.2-19999 test, the cleaning ability of this working solution is 97%, and the reflectivity of the cold-rolled steel plate surface after degreasing is 89%. , the residue on the steel plate surface is less than 10mg / m 2 .

[0027] Specifically, the principle of using the degreaser to clean grease is:

[0028] Through sodium hydroxide, and / or potassium hydroxide and other alkaline substances, saponification reaction occurs with animal and vegetable oils and mineral ...

Embodiment 2

[0048] Take 36% sodium hydroxide, 25% potassium hydroxide, 4% sodium carbonate, 3% sodium citrate, 4% sodium gluconate, 2% polyaspartic acid, 3% polyacrylic acid sodium salt, fatty alcohol by weight Ether nonionic surfactant 4%, carboxylate anionic surfactant 2%, desalinated water 17%. After these raw materials are mixed evenly, a concentrated solution is made. When in use, dilute the concentrated solution into a working solution with a mass fraction of 3%. According to the standard method JB / T 4323.2-19999 test, the cleaning ability of this working solution is 97%, and the reflectivity of the cold-rolled steel plate surface after degreasing is 89%. , the residue on the steel plate surface is less than 10mg / m 2 .

[0049] The principle of cleaning grease with the degreasing agent in this embodiment is the same as the principle of cleaning grease with the degreasing agent in Embodiment 1. For the sake of brevity in the description, it will not be repeated here.

Embodiment 3

[0051] Take 10% sodium hydroxide, 25% potassium hydroxide, 3.2% sodium carbonate, 2% sodium citrate, 3% sodium gluconate, 1.3% polyaspartic acid, 2.1% polyacrylic acid sodium salt, fatty alcohol by weight Ether nonionic surfactant 1.8%, carboxylate anionic surfactant 0.8%, desalinated water 50.8%. After these raw materials are mixed evenly, a concentrated solution is made. When in use, dilute the concentrated solution into a working solution with a mass fraction of 3%, and test it according to the standard method JB / T 4323.2-19999. The cleaning ability of this working solution is 98.1%, and the reflectivity of the cold-rolled steel plate surface after degreasing is 90%. , the residue on the steel plate surface is less than 10mg / m 2 .

[0052] The principle of cleaning grease with the degreasing agent in this embodiment is the same as the principle of cleaning grease with the degreasing agent in Embodiment 1. For the sake of brevity in the description, it will not be repeated...

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Abstract

The invention discloses a phosphorus-free degreaser. The phosphorus-free degreaser is prepared from the following raw materials in percentage by weight: 10-36 percent of sodium hydroxide, 0-25 percent of potassium hydroxide, 2-4 percent of sodium carbonate, 2-3 percent of sodium citrate, 2-4 percent of sodium gluconate, 0.5-2 percent of poly-aspartic acid, 0.8-3 percent of polyacrylic acid sodium salt, 0.8-4 percent of a nonionic surfactant and the balance of water. According to the phosphorus-free degreaser disclosed by the invention, saponification is carried out on the sodium hydroxide, the potassium hydroxide and oil; the sodium carbonate and the sodium citrate provide an alkaline condition; reaction is carried out on the sodium gluconate, the poly-aspartic acid and metal ions in the oil; and the polyacrylic acid sodium salt and the surfactants are capable of weakening the surface tension of water. A method provided by the invention is used for solving the technical problems of poor stability and environmental pollution of a degreaser in the prior art. The invention provides the phosphorus-free degreaser which is high storage stability and does not contain harmful elements including heavy metals, phosphorus and the like.

Description

technical field [0001] The invention relates to the technical field of steel rolling chemicals, in particular to a phosphorus-free degreasing agent. Background technique [0002] In the production process of cold-rolled galvanized products, degreasing is one of the important processes. The cold rolling process before galvanizing needs to use emulsion and even anti-rust oil in the process of production, transportation, storage and transportation. At the same time, the product may be stained with some other pollutants such as iron powder, dust, and fingerprints during processing. etc. Therefore, the strip steel should be degreased before galvanizing, and the degree of degreasing on the surface will directly affect the quality of subsequent treatment. A good degreasing effect will provide a strong quality assurance for the subsequent process, reduce the occurrence of product surface defects, especially play an important role in improving the adhesion and corrosion resistance o...

Claims

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Application Information

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IPC IPC(8): C23G1/19
CPCC23G1/19
Inventor 庞涛程鹏黄先球郎丰军马颖周克飞胡华东陈园林周诗正
Owner 武汉钢铁有限公司
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