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Corrosion inhibitor

A technology of corrosion inhibitor and water quality stabilizer, applied in the field of corrosion inhibitor, can solve problems such as environmental pollution, and achieve the effects of strong adaptability, excellent corrosion inhibition, and excellent anti-scaling function

Inactive Publication Date: 2014-04-02
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the existing corrosion inhibitors are easy to pollute the environment, the embodiment of the present invention provides a corrosion inhibitor

Method used

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  • Corrosion inhibitor

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Embodiment 1

[0023] The embodiment of the present invention provides a kind of corrosion inhibitor, and described corrosion inhibitor comprises the following mass percentage material:

[0024] Fluoride salt 1%-8%, molybdate 0.5%-1.5%, water quality stabilizer 0.0008-0.001%, borate 0.15-0.25%, silicate 0.25%-0.35%, carboxylate 0.3%-2.5% , Aromatic azoles 3%-5%, the balance is deionized water.

[0025] In the embodiment of the present invention, the fluorine salt and molybdate contained in the corrosion inhibitor belong to the anodic corrosion inhibitor in the inorganic corrosion inhibitor. Compared with the nitrite and chromate corrosion inhibitors, the fluoride and molybdate Salt has the advantages of low toxicity, harmlessness and good stability. They can effectively form a dense protective film on the surface of metals or alloys to prevent the corrosion of metals or alloys (especially magnesium alloys) by ethylene glycol decomposition products; Scale substances form stable complexes, w...

Embodiment 2

[0037] The embodiment of the present invention provides a kind of corrosion inhibitor, and described corrosion inhibitor comprises the following mass percentage material:

[0038] Sodium fluoride 5%, sodium molybdate 0.97%, polymaleic anhydride 0.0009%, sodium tetraborate 0.2%, sodium silicate 0.35%, sodium benzoate 1.3%, sodium methylbenzotriazole nitrogen 3.7%, the balance is Deionized water.

[0039] The concrete preparation steps of this corrosion inhibitor are as follows:

[0040] Add 5% sodium fluoride and 0.97% sodium molybdate into the beaker and stir until uniform. Then add 0.0009% polymaleic anhydride, 0.2% sodium tetraborate, 0.35% sodium silicate, 1.3% sodium benzoate and 3.7% sodium methylbenzotriazole nitrogen to the mixed material, and continue stirring until well mixed. Finally, the remaining amount of deionized water is added to the uniformly mixed materials within 30 minutes, and the desired composite corrosion inhibitor of the present invention can be obt...

Embodiment 3

[0049] The embodiment of the present invention provides a kind of corrosion inhibitor, and described corrosion inhibitor comprises the following mass percentage material:

[0050] Potassium fluoride and sodium fluoride compound 8%, potassium molybdate 0.5%, polyacrylate 0.001%, sodium metaborate 0.25%, sodium silicate 0.25%, sodium gluconate 0.3%, mercaptobenzotriazepam azole 3%, the balance is deionized water.

[0051] Concrete preparation steps are as follows:

[0052] A compound of potassium fluoride and sodium fluoride with a mass fraction of 8% (the ratio of potassium fluoride to sodium fluoride is optional) and 0.5% potassium molybdate, 0.001% polyacrylate, 0.25% Sodium metaborate, 0.25% sodium silicate, 0.3% sodium gluconate and 3% mercaptobenzotriazole were added into the beaker, and stirred until uniformly mixed. Then add the remaining amount of deionized water into the uniformly mixed material within 40 minutes, and after stirring evenly, the desired corrosion inhi...

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Abstract

The invention discloses a corrosion inhibitor, belonging to the field of a corrosion remover for a cooling system of an automobile. The corrosion inhibitor comprises the following substances by weight percent: 1-8% of villiaumite, 0.5-1.5% of molybdate, 0.0008-0.001% of a water stabilizer, 0.15-0.25% of borate, 0.25-0.35% of silicate, 0.3-2.5% of carboxylate, 3-5% of aromatic azole and the balance being deionized water. By adopting the embodiment of the invention, a certain ratio of villiaumite, molybdate, the water stabilizer, borate, silicate, carboxylate, aromatic azole and deionized water are compounded, so that excellent corrosion inhibition and antiscaling function can be generated on a plurality of metals or alloys (such as aluminum, copper, steel, cast iron, soldering tin, magnesium and alloys thereof) by using the efficient synergic effects of the raw materials, and the corrosion effect adaptability is strong. Furthermore, by adopting the corrosion inhibitor provided by the embodiment of the invention, use of nitrite, chromate, phosphate or amine salt is avoided, and environment pollution is avoided.

Description

technical field [0001] The invention relates to the field of corrosion inhibitors for automobile cooling systems, in particular to a corrosion inhibitor. Background technique [0002] Antifreeze is a kind of coolant with antifreeze and antiboiling functions for automobile engines and their cooling systems. It is generally prepared by adding ethylene glycol, calcium chloride, glycerol, etc. to cooling water. However, automotive engines and their cooling systems are mostly made of various metals and alloys, such as aluminum, copper, steel, cast iron, solder, aluminum, magnesium and alloys. These metals or alloys are in contact with antifreeze containing ethylene glycol, calcium chloride or glycerol for a long time at high temperature, which is prone to corrosion and fouling, resulting in perforation and leakage of the engine and its cooling system parts , air leakage, cooling effect is getting worse and so on. Therefore, corrosion inhibitors are often added to antifreeze to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/08C09K5/20
Inventor 张静
Owner CHERY AUTOMOBILE CO LTD
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