A kind of composite passivation solution and its preparation method and application

A technology of passivation solution and hydrochloric acid aqueous solution, which is applied in the coating process of metal materials, etc., can solve problems such as cumbersome operation, and achieve the effects of improving bonding force, achieving repairability, and excellent anti-corrosion effect

Active Publication Date: 2022-07-26
METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above methods all require special electrolysis equipment, and the operation is cumbersome.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1 A compound passivation solution

[0043] The raw material composition and proportioning of the composite passivation solution of the present embodiment are (with the composite passivation solution gross weight being 100 parts):

[0044]5 parts of methyltriethoxysilane, 30 parts of methanol, 15 parts of 2.5% aqueous hydrochloric acid solution, 10 parts of 20% aqueous acetic acid solution, 0.5 part of 10% conductive polyaniline butanol solution, and the balance being water.

[0045] Prepared by:

[0046] 1. Prepare each raw material according to the proportion;

[0047] II. Methyltriethoxysilane, methanol, 2.5% aqueous hydrochloric acid solution and water were mixed uniformly, stirred at 30-38° C. for 5 hours, and after cooling to room temperature, a silane coupling agent hydrolyzed solution was obtained;

[0048] III. Under stirring, add 20% acetic acid aqueous solution and 10% conductive polyaniline butanol solution to the hydrolyzed solution of the silane ...

Embodiment 2

[0049] Example 2 A compound passivation solution

[0050] The raw material composition and proportioning of the composite passivation solution of the present embodiment are (with the composite passivation solution gross weight being 100 parts):

[0051] 20 parts of γ-glycidyl ether oxypropyltriethoxysilane, 10 parts of ethanol, 2 parts of 2.5% hydrochloric acid aqueous solution, 0.5 part of 20% citric acid aqueous solution, 10 parts of 10% conductive polyaniline butanol solution, the balance is water.

[0052] The target composite passivation solution was prepared according to basically the same method and steps as in Example 1.

Embodiment 3

[0053] Example 3 A compound passivation solution

[0054] The raw material composition and proportioning of the composite passivation solution of the present embodiment are (with the composite passivation solution gross weight being 100 parts):

[0055] 5 parts of ethoxytrimethylsilane, 10 parts of γ-methacryloyloxypropyltrimethoxysilane, 5 parts of ethanol, 10 parts of n-propanol, 5 parts of 2.5% aqueous hydrochloric acid, 1 part of 20% aqueous acetic acid , 1 part of 20% citric acid aqueous solution, 2 parts of 10% conductive polyaniline butanol solution, and the balance is water.

[0056] The target composite passivation solution was prepared according to basically the same method and steps as in Example 1.

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Abstract

The invention provides a composite passivation solution and a preparation method and application thereof. Taking the total weight of the composite passivation solution to be 100 parts, the raw materials include: 5-25 parts of silane coupling agent, 10-30 parts of lower saturated fatty alcohol, 2-15 parts of hydrochloric acid aqueous solution with a mass percentage concentration of 2.5% , 0.5-10 parts of an organic acid aqueous solution with a concentration of 20% by mass, 0.5-10 parts of a conductive polyaniline butanol solution with a concentration of 0.2%-10% by mass, and the balance of water. The present invention also provides a metal surface anticorrosion method utilizing the above-mentioned composite passivation solution. The composite passivation solution of the present invention can make the metal substrate have good anti-corrosion performance.

Description

technical field [0001] The invention belongs to the technical field of metal anti-corrosion, and particularly relates to a composite passivation solution for metal surface anti-corrosion and a preparation method thereof. Background technique [0002] The most commonly used protection method for metal materials is to cover the metal surface with an organic, inorganic or organic-inorganic composite film as a protective layer by physical, chemical or electrochemical processes to prevent or slow down metal corrosion. [0003] Silane coupling agent has a unique chemical structure, and silicon (Si) atoms are bonded with more than two different reactive groups, and the chemical formula can be expressed as RSiX 3 . Wherein: X is a hydrolyzable group, usually selected from chlorine group, methoxy group, ethoxy group, methoxyethoxy group, acetoxy group, etc. When these groups are hydrolyzed, silanol (Si(OH) 3 ) to combine with inorganic substances to form siloxane; Y is an organic f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/50C23C22/53C23C22/56C23C22/57
CPCC23C22/50C23C22/53C23C22/56C23C22/57C23C2222/20
Inventor 王涛贾恒琼祝和权张恒杜存山李海燕吴韶亮魏曌王玮杜玮伊钟毓南阳张喆
Owner METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI
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