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Preparation method of metal rust removing liquid

A rust removal liquid and metal technology, which is applied in the field of metal surface treatment, can solve the problems of high labor intensity, low efficiency, troublesome cleaning, etc., and achieve the effect of short rust removal time, convenient use and thorough rust removal

Inactive Publication Date: 2017-04-19
WUXI YONGXING METAL HOSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are basically two methods for removing oil and rust on the surface of metal materials. The traditional method is manual rust removal. It requires a lot of manpower and material resources, and at the same time, the efficiency is low, and the rust dust caused by rust removal is flying everywhere, causing pollution to the environment
Another method is chemical rust removal, which mainly uses a solution of chemical substances such as acid to chemically react with oxides on the metal surface to generate soluble or insoluble metal salts, which are then dissolved in an aqueous solution to achieve the purpose of rust removal , usually use strong acid and strong alkali to remove rust and oil. This method requires a special site, and at the same time, it is troublesome to clean, the speed is slow, and the efficiency is low. When cleaning, it is necessary to pay attention to protecting the safety of personnel. At the same time, acid mist will be generated during the cleaning process, which will affect the environment. And the health of personnel, and the treated metal surface can produce secondary oxidation corrosion after staying in the atmosphere for a period of time, so it can only play a temporary corrosion inhibition effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A preparation method of metal derusting liquid, the steps are as follows:

[0018] Step 1, in parts by weight, take 2 parts of sodium metasilicate, 1 part of polyethylene glycol 800, 0.2 part of polyvinyl alcohol, 0.2 part of sodium citrate, 0.3 part of lecithin and 20 parts of water, heat and mix evenly, heat The temperature is 30°C, the stirring speed is 120 rpm, and the stirring time is 20 minutes to obtain mixture 1;

[0019] Step 2, in parts by weight, take 1 part of triethanolamine, 0.3 part of ammonium molybdate, 0.5 part of triethanolamine oleate, 0.1 part of urea, 0.3 part of sodium carboxymethylcellulose, and 10 parts of water, mix well, and the stirring speed It was 100 rev / min, and the stirring time was 30 minutes to obtain mixture 2;

[0020] Step 3, in parts by weight, take 0.3 parts of hydroxyethylidene diphosphonic acid, add it to mixture 1, heat it to 50°C under the condition of nitrogen protection, and then add it to the mixture under stirring at a st...

Embodiment 2

[0021] A preparation method of metal derusting liquid, the steps are as follows:

[0022] Step 1, in parts by weight, take 3 parts of sodium metasilicate, 1 part of polyethylene glycol 800, 0.3 parts of polyvinyl alcohol, 0.4 parts of sodium citrate, 0.5 parts of lecithin and 22 parts of water, heat and mix evenly, heat The temperature was 34°C, the stirring speed was 125 rpm, and the stirring time was 23 minutes to obtain mixture 1;

[0023] Step 2, in parts by weight, take 2 parts of triethanolamine, 0.5 part of ammonium molybdate, 0.6 part of triethanolamine oleate, 0.2 part of urea, 0.4 part of sodium carboxymethylcellulose, and 12 parts of water, mix well, and the stirring speed It was 105 rpm, and the stirring time was 33 minutes to obtain mixture 2;

[0024] Step 3, in parts by weight, take 0.5 parts of hydroxyethylidene diphosphonic acid, add it to mixture 1, heat it to 55°C under the protection of argon, and then add it under stirring at a stirring speed of 73 rpm M...

Embodiment 3

[0025] A preparation method of metal derusting liquid, the steps are as follows:

[0026] Step 1, in parts by weight, take 4 parts of sodium metasilicate, 2 parts of polyethylene glycol 800, 0.4 part of polyvinyl alcohol, 0.6 part of sodium citrate, 0.7 part of lecithin and 24 parts of water, heat and mix evenly, heat The temperature was 38°C, the stirring speed was 140 rpm, and the stirring time was 26 minutes to obtain mixture 1;

[0027] Step 2, in parts by weight, take 2 parts of triethanolamine, 0.7 part of ammonium molybdate, 0.6 part of triethanolamine oleate, 0.2 part of urea, 0.5 part of sodium carboxymethylcellulose, and 13 parts of water, mix well, and the stirring speed It was 110 rpm, and the stirring time was 36 minutes to obtain mixture 2;

[0028] Step 3, in parts by weight, take 0.8 parts of hydroxyethylidene diphosphonic acid, add it to mixture 1, heat it to 55°C under the condition of nitrogen protection, and then add it to the mixture at a stirring speed o...

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Abstract

The invention discloses a preparation method of a metal rust removing liquid. The preparation method comprises steps as follows: sodium metasilicate, polyethylene glycol, polyvinyl alcohol, sodium citrate, lecithin and water are heated and mixed uniformly, and a first mixture is obtained; triethanolamine, ammonium molybdate, triethanolamine oleate, urea, sodium carboxymethylcellulose and water are taken and mixed uniformly, and a second mixture is obtained; etidronic acid is taken and added to the first mixture, an obtained mixture is heated under the inert gas shielding condition, the second mixture is added during stirring of the obtained mixture, stirring is continued after addition of the second mixture, then ethanediamine and acetic anhydride are dropwise added and mixed uniformly to reach the room temperature, and the metal rust removing liquid is obtained. The metal rust removing liquid is convenient to use, all that is required is to soak the metal requiring rust removal into the metal rust removing liquid, rust is removed thoroughly, the rust removing time is short, and the metal surface is not damaged after rust removal.

Description

technical field [0001] The invention belongs to the field of metal surface treatment, and in particular relates to a preparation method of a metal descaling liquid. Background technique [0002] At present, there are basically two methods for removing oil and rust on the surface of metal materials. The traditional method is manual rust removal. Specifically, it uses manual cleaning of oil stains and metal brushes to remove rust. This is not only labor-intensive, but also It requires a lot of manpower and material resources, and at the same time, the efficiency is low, and the rust dust caused by rust removal is flying everywhere, causing pollution to the environment. Another method is chemical rust removal, which mainly uses a solution of chemical substances such as acid to chemically react with oxides on the metal surface to generate soluble or insoluble metal salts, which are then dissolved in an aqueous solution to achieve the purpose of rust removal , usually use strong...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/00
CPCC23G1/00
Inventor 王志兴
Owner WUXI YONGXING METAL HOSE
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