Preparation method of modified titanium oxide coating applied to metal matrix corrosive protection

A metal substrate and corrosion protection technology, applied in coatings, anti-corrosion coatings, and devices for coating liquid on the surface, can solve problems such as metal substrate failure, coating damage, local corrosion, etc., and achieve improved application life and thickness. control, surface smoothing effect

Active Publication Date: 2013-03-06
滕州市产品质量监督检验所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, to realize the modification of semiconductor structure, the modification method usually used to prepare titanium oxide coating requires a high-temperature heating process, and a large number of micro-defects are formed on the surface of the coating, resulting in the electrolyte easily invading into the coating through the micro-defects of the titanium oxide coating under the condition of no light. layer, leading to coating damage and peeling, and induces localized corrosion on the metal surface, and finally leads to failure of the metal substrate

Method used

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  • Preparation method of modified titanium oxide coating applied to metal matrix corrosive protection

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Experimental program
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Effect test

Embodiment 1

[0028] (1) Use an anhydrous pipette to pipette 10ml of butyl titanate, measure 50ml of absolute ethanol in a graduated cylinder, and mix to make solution A; measure and mix 10ml of deionized water, 10ml of glacial acetic acid and 20ml of absolute ethanol, and weigh Add 0.15g of tin tetrachloride crystals (the molar ratio to butyl titanate is 1:50) and stir to dissolve to form solution B; mix solution A and solution B under stirring to obtain light yellow transparent sol, sol Placed at room temperature for aging for 24 hours, it turned into a solid gel.

[0029] (2) Put the obtained solid gel into a drying oven to fully dry to obtain a loose powder, grind the powder with a mortar and put it in a crucible, put it into a muffle furnace and raise the temperature to 400 at a speed of less than 3K / min ℃ for 30 minutes to obtain tin oxide composite modified nano-titanium oxide powder.

[0030] (3) Measure 5ml of γ-methacryloxypropyltrimethoxysilane, 5ml of water and 90ml of ethanol,...

Embodiment 2

[0034] (1) Use an anhydrous pipette to pipette 10ml of butyl titanate, measure 50ml of absolute ethanol in a graduated cylinder, and mix to make solution A; measure and mix 10ml of deionized water, 10ml of glacial acetic acid and 20ml of absolute ethanol, and weigh Add 0.20g of tin tetrachloride crystals (the molar ratio to butyl titanate is about 1:40) and stir to dissolve to make solution B; mix solution A and solution B under stirring to obtain a light yellow transparent sol, The sol was aged at room temperature for 24 hours and transformed into a solid gel.

[0035] (2) Put the obtained solid gel into a drying oven to fully dry to obtain a loose powder, grind the powder with a mortar, put it in a crucible, put it into a muffle furnace and raise the temperature to 450 at a speed of less than 3K / min ℃ for 30 minutes to obtain tin oxide composite modified nano-titanium oxide powder.

[0036] (3) Measure 7ml of γ-methacryloxypropyltrimethoxysilane, 7ml of water and 86ml of et...

Embodiment 3

[0041] (1) Use an anhydrous pipette to pipette 10ml of butyl titanate, measure 50ml of absolute ethanol in a graduated cylinder, and mix to make solution A; measure and mix 10ml of deionized water, 10ml of glacial acetic acid and 20ml of absolute ethanol, and weigh Add 0.25g of tin tetrachloride crystals (the molar ratio to butyl titanate is 1:30) and stir to dissolve to form solution B; mix solution A and solution B under stirring to obtain a light yellow transparent sol, and The sol was aged at room temperature for 24 hours and transformed into a solid gel.

[0042] (2) Put the obtained solid gel into a drying oven to fully dry to obtain a loose powder, grind the powder with a mortar, put it in a crucible, put it into a muffle furnace and raise the temperature to 500 at a speed of less than 3K / min ℃ for 30 minutes to obtain tin oxide composite modified nano-titanium oxide powder.

[0043](3) Measure 9ml of γ-methacryloxypropyltrimethoxysilane, 9ml of water and 82ml of ethan...

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Abstract

The invention relates to a preparation method of a modified titanium oxide coating applied to metal matrix corrosive protection. A titanium oxide semiconductor structure is regulated by using stannic oxide, wherein the molar ratio of the stannic oxide to the titanium oxide is 1:50-1:20, and the surface property of the coating is optimized by using gamma-methacryloxy propyl trimethoxyl silane. The preparation method specifically comprises the steps of: preparing modified titanium oxide sol, preparing modified titanium oxide powder, preparing silane sol, preparing coating slurry, pretreating the metal surface, and coating the modified titanium oxide coating. When coated on the surface of a metal matrix, the modified titanium oxide coating prepared by adopting the preparation method has the advantages of controllable thickness, flat surface, firmness in combination with the metal matrix and capability of effectively reducing intrusion of a corrosive medium and also shows a certain dewatering effect; and the modified titanium oxide coating has a cathode protection effect under a light condition, also can well protect the metal matrix under the condition of no light, and shows excellent corrosion protection property.

Description

technical field [0001] The invention relates to a preparation method of a titanium oxide modified coating applied to corrosion protection of metal substrates, and belongs to the field of corrosion protection coatings of metal substrates. Background technique [0002] Metal corrosion protection is of great significance to the development of coastal industries and the utilization of marine resources. Nano-titanium oxide photocathode protection coating is a new type of cathodic protection technology researched and developed in recent years. When irradiated with light waves (λ≤380nm) whose energy is higher than the absorption threshold of titanium oxide, the electrons in it are excited from the valence band to the conduction band to form negatively charged electrons (e - ) and positively charged holes (h + ). Under the action of the space charge layer, the holes concentrate on the surface of the electrode and undergo an oxidation reaction with the electron donor water in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/08B05D7/24B05D7/14B05D3/12
Inventor 张伟伟韩野姚树玉孙海清
Owner 滕州市产品质量监督检验所
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