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Environmental organic acid compound corrosion inhibitor for coolant of water cooling engine

A water-cooled engine and composite corrosion inhibitor technology, applied in the field of composite corrosion inhibitors, can solve problems such as human body and environmental hazards

Inactive Publication Date: 2010-02-10
黑龙江省化工研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the inorganic salt corrosion inhibitors in the existing water-cooled engine coolant have great harm to the human body and the environment; corrosion inhibitor

Method used

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  • Environmental organic acid compound corrosion inhibitor for coolant of water cooling engine

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specific Embodiment approach 1

[0007] Specific embodiment 1: The organic acid composite corrosion inhibitor for water-cooled engine coolant in this embodiment consists of 10-50 parts of dibasic alkyl fatty carboxylic acid, 10-60 parts of caustic soda solution, 5-30 parts of boron Salt, 9-15 parts of boron oxide, 0.1-1.0 parts of silicate, 3-10 parts of nitrogen-containing heterocyclic compounds and 0.1-2.0 parts of defoamer.

[0008] The preparation method of the organic acid composite corrosion inhibitor for water-cooled engine coolant in this embodiment is simple, and it only needs to be uniformly stirred by mechanical means.

specific Embodiment approach 2

[0009] Specific embodiment two: The environment-friendly organic acid composite corrosion inhibitor for water-cooled engine coolant in this embodiment consists of 15 to 40 parts of dibasic alkyl fatty carboxylic acid, 15 to 40 parts of caustic soda solution, 10 to 25 parts by weight. It consists of borate, 10-13 parts of boron oxide, 0.4-0.8 part of silicate, 5-8 parts of nitrogen-containing heterocyclic compound and 0.5-1.5 parts of defoamer.

specific Embodiment approach 3

[0010] Specific embodiment three: The environment-friendly organic acid composite corrosion inhibitor for the water-cooled engine coolant of this embodiment consists of 20 parts of dibasic alkyl fatty carboxylic acid, 35 parts of caustic soda solution, 15 parts of borate, 11.5 parts by weight. It consists of boron oxide, 0.5 part of silicate, 6.5 part of nitrogen-containing heterocyclic compound and 1.0 part of defoamer.

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Abstract

The invention relates to an organic acid compound corrosion inhibitor, in particular to an environmental organic acid compound corrosion inhibitor for the coolant of a water cooling engine. The invention solves the problem that inorganic salt corrosion inhibitor in the coolant of the water cooling engine is too much so as to cause overlarge damages to the environment and human body. The organic acid compound corrosion inhibitor comprises the following components in parts by weight: 10-50 parts of dialkyl carboxylic acid, 10-60 parts of sodium hydroxide, 5-30 parts of borate, 9-15 parts of boron oxide, 0.1-1.0 part of silicate, 3-10 parts of nitrogen-bearing heterocyclic compound and 0.1-2.0 parts of defoaming agent. The organic acid corrosion inhibitor of the invention can not only inhibitthe corrosion of various metals, but also contain low chlorine ion, no nitrite, no phosphate and no amine, and is environmentally friendly to the environment and harmless to the human body. The organic acid corrosion inhibitor of the invention plays an improving role in the realization of the goal of environmental protection and energy saving of Chinese automobile industry.

Description

technical field [0001] The invention relates to an organic acid-based composite corrosion inhibitor in engine coolant, in particular to an organic acid composite corrosion inhibitor in water-cooled engine coolant. Background technique [0002] The corrosion inhibitor in the water-cooled engine coolant, in the engine cooling system, plays a role in delaying the corrosion of various metals by the engine coolant (mainly: copper, brass, steel, cast iron, solder, cast aluminum six metals) , thus prolonging the service life of the water tank and the engine, that is, the entire engine cooling system. In the past, these corrosion inhibitors were mainly based on various inorganic salts, especially containing nitrite, phosphate, amine, chlorine and other ions or compounds. The existence of these components has serious harm to the human body and the environment. Contents of the invention [0003] The purpose of the present invention is to solve the problem that the inorganic salt co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/08C23F11/14C23F11/18
Inventor 陈建滨吕洪镇李晓娟孙昌龙
Owner 黑龙江省化工研究院