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Engine coolant compound corrosion inhibitor and preparation method thereof

A technology of engine coolant and composite corrosion inhibitor, which is applied in the field of engine coolant, can solve the problems of not being optimal, unable to adapt to the complex environment of circulating cooling water, etc., achieve good interaction, improve inhibition and protection performance, and corrosion inhibition performance Elevated effect

Inactive Publication Date: 2019-08-23
GUANGXI LIUGONG PREMIUM GRADE LUBRICATING OIL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, from the perspective of corrosion inhibition performance, it has not reached the best, and cannot adapt to the complex environment of circulating cooling water.

Method used

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  • Engine coolant compound corrosion inhibitor and preparation method thereof
  • Engine coolant compound corrosion inhibitor and preparation method thereof
  • Engine coolant compound corrosion inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Mix 50 parts by weight of water and 10 parts by weight of sodium lignosulfonate, and control the mixing temperature in a water bath to 15°C, then add 30 parts by weight of sodium silicate and 2 parts by weight of benzotriazole and mix well , the water bath controls the mixing temperature to 15°C, uses sodium hydroxide to adjust the pH value to 8.5, adds 10 parts by weight of polyacrylamide, 5 parts by weight of silicone, and 5 parts by weight of water-soluble silicone defoamer and mixes evenly. Get a corrosion inhibitor.

Embodiment 2

[0021] Mix 70 parts by weight of water and 20 parts by weight of sodium lignosulfonate, and control the mixing temperature in a water bath to 35°C, then add 50 parts by weight of potassium silicate and 8 parts by weight of benzotriazole and mix well , the water bath controls the mixing temperature to 35°C, uses sodium hydroxide to adjust the pH value to 9.5, adds 20 parts by weight of polyacrylamide, 15 parts by weight of silicone, and 15 parts by weight of glyceryl ether and mixes evenly to obtain corrosion inhibition agent.

Embodiment 3

[0023] Mix 60 parts by weight of water and 15 parts by weight of sodium lignosulfonate, and control the mixing temperature in a water bath to 25°C, then add 40 parts by weight of sodium silicate and 5 parts by weight of benzotriazole and mix well , the water bath controls the mixing temperature to 25°C, uses sodium hydroxide to adjust the pH value to 9.0, adds 15 parts by weight of polyacrylamide, 10 parts by weight of silicone, and 10 parts by weight of water-soluble silicone defoamer and mixes evenly. Get a corrosion inhibitor.

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PUM

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Abstract

The invention provides an engine coolant compound corrosion inhibitor which is characterized by comprising the following components: 50-70 parts of water, 10-20 parts of polyacrylamide, 10-20 parts ofsodium lignosulphonate, 5-15 parts of an antifoaming agent, 30-50 parts of silicate, 5-15 parts of silica ketone and 2-8 parts of benzotriazole. The added adsorption agent polyacrylamide can serve asa flocculating agent for adsorbing floating impurities in circulating water, so that the agent composition has polyfunctionality. Meanwhile, the agent can be well adsorbed onto a metal surface or matched with other agents, and interactions among agents can be well achieved. Furthermore, the defect that the benzotriazole is singly used is overcome, and by compounding the benzotriazole and a greenenvironmental-friendly agent silica ketone, the corrosion inhibition property of the composition is greatly improved. The compound corrosion inhibitor has excellent corrosion inhibition effects at a normal temperature and a high temperature.

Description

technical field [0001] The invention relates to the technical field of engine coolant, in particular to a composite corrosion inhibitor for engine coolant and a preparation method thereof. Background technique [0002] The corrosion inhibitor in the coolant is the most important additive. Except for the chromate and emulsified oil corrosion inhibitors used in the early stage, there is no corrosion inhibitor that can protect all metals at the same time. Therefore, In addition to the development and selection of other additives in the research on the formulation of coolant additives, one of the most important contents is the compounding of corrosion inhibitors. There are many formulas formed by the compounding of corrosion inhibitors. According to the order of the key technologies of corrosion inhibitors, the formulas mainly go through three stages: early silicate-free formula, conventional silicate formula and organic acid formula. [0003] Silicate is a special corrosion in...

Claims

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Application Information

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IPC IPC(8): C09K5/20C23F11/06
CPCC09K5/20C23F11/06
Inventor 吴宪韦起桂李云军陈科志罗柳云赵芳宇
Owner GUANGXI LIUGONG PREMIUM GRADE LUBRICATING OIL
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