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Siloxane ketone aluminum corrosion inhibitor as well as preparation method and application thereof

A siloxane ketone aluminum and corrosion inhibitor technology, which is applied in the field of aluminum corrosion inhibitors, can solve the problems of easy precipitation and failure of inorganic salt corrosion inhibitors, and the inability of organic phosphorus-containing corrosion inhibitors to meet the requirements of aluminum corrosion inhibition. Effects of improving corrosion protection performance, improving adhesion, and improving corrosion inhibition effect

Active Publication Date: 2022-02-11
LUOYANG INST OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a siloxane ketone aluminum corrosion inhibitor, which can overcome the easy precipitation and failure of existing inorganic salt corrosion inhibitors, and the organic phosphorus-containing inhibitors. The defect that the corrosion agent cannot meet the corrosion inhibition requirements of aluminum under the condition of high pH value

Method used

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  • Siloxane ketone aluminum corrosion inhibitor as well as preparation method and application thereof
  • Siloxane ketone aluminum corrosion inhibitor as well as preparation method and application thereof
  • Siloxane ketone aluminum corrosion inhibitor as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A kind of siloxane aluminum corrosion inhibitor A, its synthetic steps are:

[0025] (1) Mix 150mL of methanol, 23.6g of γ-(2,3-glycidoxy)propyltrimethoxysilane and 10.4g of anhydrous sodium bisulfite in a flask equipped with a thermometer and a condenser tube under stirring , add 0.068g of benzyltriethylammonium chloride as a phase transfer catalyst, heat up to reflux, react until the solid is completely dissolved, and obtain a methanol solution of the intermediate;

[0026] (2) Add 10.4 g of tetraethyl orthosilicate to the methanol solution of the intermediate prepared in step (1), and slowly add 40 mL of acetic acid aqueous solution with a concentration of 0.01 mol / L at 40° C., and after the addition, 40 ℃ heat preservation reaction for 12h;

[0027] (3) Remove methanol and ethanol by distillation under reduced pressure, and add water to obtain an aqueous solution A of siloxane aluminum corrosion inhibitor with a concentration of 40%.

Embodiment 2

[0029] A siloxane aluminum corrosion inhibitor B, its synthesis steps are:

[0030] (1) Mix 150mL of methanol, 23.6g of γ-(2,3-glycidoxy)propyltrimethoxysilane and 10.4g of anhydrous sodium bisulfite in a flask equipped with a thermometer and a condenser tube under stirring , add 0.068g of benzyltriethylammonium chloride as a phase transfer catalyst, heat up to reflux, react until the solid is completely dissolved, and obtain a methanol solution of the intermediate;

[0031] (2) Add 20.8 g of tetraethyl orthosilicate to the methanol solution of the intermediate prepared in step (1), slowly add 40 mL of aqueous acetic acid solution with a concentration of 0.01 mol / L at 40° C., and after the addition is completed, 40 ℃ heat preservation reaction for 12h;

[0032] (3) Remove methanol and ethanol by distillation under reduced pressure, and add water to obtain an aqueous solution B of siloxane aluminum corrosion inhibitor with a concentration of 40%.

Embodiment 3

[0034] A kind of siloxane aluminum corrosion inhibitor C, its synthetic steps are:

[0035] (1) Mix 150mL of methanol, 23.6g of γ-(2,3-glycidoxy)propyltrimethoxysilane and 10.4g of anhydrous sodium bisulfite in a flask equipped with a thermometer and a condenser tube under stirring , add 0.068g of benzyltriethylammonium chloride as a phase transfer catalyst, heat up to reflux, react until the solid is completely dissolved, and obtain a methanol solution of the intermediate;

[0036] (2) Add 31.2 g of tetraethyl orthosilicate to the methanol solution of the intermediate prepared in step (1), slowly add 40 mL of acetic acid aqueous solution with a concentration of 0.01 mol / L at 40° C., and after the addition is completed, 40 ℃ heat preservation reaction for 12h;

[0037] (3) Remove methanol and ethanol by distillation under reduced pressure, and add water to obtain an aqueous solution C of siloxane aluminum corrosion inhibitor with a concentration of 40%.

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Abstract

The invention provides a siloxane ketone aluminum corrosion inhibitor, and belongs to the technical field of aluminum corrosion inhibitors. The invention further provides a preparation method of the siloxane ketone aluminum corrosion inhibitor. The structure of the aluminum corrosion inhibitor is an organosiloxane derivative with a sodium sulfonate group, and the sulfo structure weakens the limitation of the pH of a formula system on the corrosion inhibitor, so that the aluminum corrosion inhibitor can be universally applied to metal working fluids such as an acidic cleaning agent, an alkaline cutting fluid and a refrigerating fluid without generating gel and precipitate; the organic siloxane structure increases the compatibility of the corrosion inhibitor in the formula, and the addition amount of the corrosion inhibitor in the formula can be increased so as to achieve the optimal corrosion inhibition effect.

Description

technical field [0001] The invention relates to the field of aluminum corrosion inhibitors, in particular to a siloxane aluminum corrosion inhibitor and its preparation method and application. Background technique [0002] Aluminum and its alloys are non-ferrous metal materials commonly used in the manufacturing industry. They are widely used in machinery manufacturing, chemical engineering, aerospace, architectural decoration, transportation and other fields. Although aluminum is relatively stable in a neutral environment, because aluminum is an amphoteric metal, it is susceptible to corrosion in acidic and alkaline environments, especially in the petrochemical industry and metal processing industry. The acid-base medium is most commonly used, and the corrosion of aluminum will It will have a great impact on the equipment. In severe cases, it may cause perforation, causing materials to flow into the environment and causing environmental pollution. Therefore, effective meas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/06C23G1/12
CPCC23G1/065C23G1/125
Inventor 王永刚王俊格胡嘉陈超毅
Owner LUOYANG INST OF SCI & TECH
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