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Environment friendly water-base anti-rusting agent

A water-based antirust agent, an environmentally friendly technology, applied in the coating process of metal materials, etc., can solve the problems of prominent corrosion, serious claims, high cost, etc., and achieve good rust resistance, good effect, and good water solubility.

Inactive Publication Date: 2012-10-24
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water-based rust inhibitor containing nitrite has excellent antirust performance, but nitrite is highly toxic and has indirect carcinogenic effect when used together with triethanolamine
However, the water-based antirust agent without nitrite often has unsatisfactory antirust performance and high cost, and users are unwilling to accept it.
Nowadays, auto parts and assembly parts often have very prominent and common problems of corrosion, and the next process or the user's reaction is very strong, and the claim in this regard is very serious.

Method used

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  • Environment friendly water-base anti-rusting agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) First, mix and heat the twelve-carbon dibasic fatty acid and triethanolamine in a reaction vessel at a mass ratio of 1:3. The heating temperature is controlled at 87°C, and the temperature is maintained at this temperature for 2 hours to synthesize water-soluble amines. Soap is used as the antirust agent monomer; (2) When the temperature of the synthesized antirust agent monomer drops to 80°C, add 1 / 4 of the specified amount of water, stir and dissolve evenly; (3) add the remaining 3 / 4 Heat the water to 45°C, slowly add sodium tetraborate, sodium carbonate, and sodium gluconate in sequence, the proportions are shown in Table 2, and stir to dissolve them completely; after stirring and dissolving completely, slowly add triethanolamine and glycerin in sequence, the proportions are shown in Table 2 Add the liquid in step (2) and stir to dissolve completely.

[0014]

Embodiment 2

[0016] (1) First, mix and heat the twelve-carbon dibasic fatty acid and triethanolamine in a reaction vessel at a mass ratio of 1:3. The heating temperature is controlled at 83°C, and the temperature is maintained at this temperature for 2 hours to synthesize water-soluble amines. Soap is used as the antirust agent monomer; (2) When the temperature of the synthesized antirust agent monomer drops to 80°C, add 1 / 4 of the specified amount of water, stir and dissolve evenly; (3) add the remaining 3 / 4 Heat the water to 40°C, slowly add sodium tetraborate, sodium carbonate, and sodium gluconate in sequence, the proportions are shown in Table 3, and stir to completely dissolve; after stirring and dissolving completely, slowly add triethanolamine and glycerin in sequence, the proportions are shown in Table 3, Add the liquid in step (2) and stir to dissolve completely.

[0017]

Embodiment 3

[0019] (1) First, mix and heat the twelve-carbon dibasic fatty acid and triethanolamine in a reaction vessel at a mass ratio of 1:3. The heating temperature is controlled at 85°C, and the temperature is maintained at this temperature for 2 hours to synthesize water-soluble amines. Soap is used as the antirust agent monomer; (2) When the temperature of the synthesized antirust agent monomer drops to 80°C, add 1 / 4 of the specified amount of water, stir and dissolve evenly; (3) add the remaining 3 / 4 Heat the water to 43°C, slowly add sodium tetraborate, sodium carbonate, and sodium gluconate in sequence, the proportions are shown in Table 4, and stir to dissolve them completely; after stirring and dissolving completely, slowly add triethanolamine and glycerin in sequence, the proportions are shown in Table 4 Add the liquid in step (2) and stir to dissolve completely.

[0020]

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Abstract

The invention relates to an environment friendly water-base anti-rusting agent which is characterized in that the preparation method comprises the following steps: mixing, stirring and heating dodec dibasic fatty acid and triethanolamine at a mass ratio of 1:3 in a reaction vessel at the constant temperature of 83-87 DEG C for 2 hours to synthesize a water-soluble amine soap used as an anti-rusting agent monomer; decreasing the temperature of the anti-rusting agent monomer to 80 DEG C or lower, adding water which is 1 / 4 of the predetermined amount, and stirring and dissolving uniformly; heating the left 3 / 4 water to 40-45 DEG C, adding sodium tetraborate, sodium carbonate and sodium gluconate slowly in sequence according to the proportion showed in table 1, and stirring to dissolve completely; adding triethanolamine and glycerol to the solution slowly in sequence according to the proportion showed in table 1, adding a liquid formed by mixing the anti-rusting agent monomer with water, and stirring dissolve completely. The main synthesized anti-rusting agent monomer is dissolved in water, and an inhibitor, a film forming agent and additives which can take a synergistic effect are added, so that a uniform, transparent and non-layered liquid without precipitates is formed. The liquid is good in cast-iron and steel component rusting resistance and good in aluminum, aluminum alloy, copper and copper alloy corrosion resistance, can be used for resisting rusting for metal parte interprocess and warehouse storage and has a rusting resisting period of 40-60 day in summer in normal circumstances.

Description

technical field [0001] The invention relates to an environment-friendly water-based antirust agent, which is used in the short-term and medium-term antirust and anticorrosion processes of metal parts in the machining and manufacturing industry. Background technique [0002] Water-based anti-rust agent refers to the anti-rust agent that can be diluted with water during use. Its main components are water-soluble anti-rust compounds, water-soluble additives, solvents and water. It is non-toxic or has little toxicity, and has no odor or Less smell and does not burn. Metal workpieces using this type of product do not need to be cleaned or only need to be cleaned before entering the next process, which greatly simplifies the treatment process and improves efficiency. In addition, water replaces organic solvents, which is environmentally friendly, fireproof, and less harmful to operators. Advantages, it is the development direction of anti-rust products. Water-based antirust agen...

Claims

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Application Information

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IPC IPC(8): C23C22/68C23C22/60
Inventor 汪玉瑄王清国李艳慧
Owner CHINA FIRST AUTOMOBILE
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