Preparation method of self-repair coating based on corrosion inhibitor intercalated nano-titanate carrier

A nano-carrier and corrosion inhibitor technology, applied in the field of preparation of self-healing coatings, can solve the problems of being easily eroded by the natural environment, weakening the protective performance of the coating, complex preparation methods, etc., and achieves easy promotion, good protective performance, Simple preparation method

Inactive Publication Date: 2014-01-01
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for preparing a self-repairing coating based on a corrosion inhibitor intercalated nano-titanic acid carrier, aiming to solve the problem that the traditional preparation method is complicated, easily eroded by the natural environment, and the corrosion inhibitor is easily separated from the coating. The technical problem that the interaction of components leads to the reduction of activity or even complete inactivation, which weakens the protective performance of the coating

Method used

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  • Preparation method of self-repair coating based on corrosion inhibitor intercalated nano-titanate carrier

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preparation example Construction

[0023] Preparation of layered nano-titanic acid The nano-layered titanic acid in step S101 has excellent organic pillar support properties, and the nitrogen-containing organic corrosion inhibitor can be easily inserted into the titanic acid layer to obtain a nano-titanic acid carrier intercalated with a corrosion inhibitor , the intercalation behavior of organic matter changes the inherent lattice structure of titanic acid, so it is not thermodynamically stable. When there is a lack of intercalation organic matter in the external environment and there are species that can interact with intercalation organic matter (such as H + ), the intercalant will inevitably come out of the interlayer, so that the inherent structure of titanic acid tends to recover, so as to realize the response-release function of the corrosion inhibitor-intercalated nano titanic acid carrier during the corrosion process.

[0024] In the preparation of nano-carrier intercalated with corrosion inhibitors, in...

example 1

[0033] Example 1 is implemented like this:

[0034] (1) Step S101 for the preparation of layered nano titanic acid

[0035] Will K 2 CO 3 and TiO 2 The solids are fully mixed according to a certain molar ratio (1:2~1:4.5), and sintered at a certain temperature (400°C~800°C) for 40h, and taken out every 10h and fully ground once to obtain K 2 Ti 4 o 9 . Take 5g K 2 Ti 4 o 9 In 100 ml 1 mol L -1In the hydrochloric acid solution, continuously stirred at 70°C for 3 days, the hydrochloric acid solution was changed once a day, after repeated washing with pure water to neutrality, after vacuum drying, the layered nano-titanic acid H was obtained. 2 Ti 4 o 9 .

[0036] (2) Preparation of nano-carrier intercalated with corrosion inhibitor in step 2 S102

[0037] H 2 Ti 4 o 9 The samples were mixed with 50 ml ethanol solution of 50% organic amine (n-octylamine, n-dodecylamine or n-hexadecylamine) and placed in a microwave reactor at a certain power (100W-1000W ) Microw...

example 2

[0042] Example 2 is implemented like this:

[0043] (1) Step S101 for the preparation of layered nano titanic acid

[0044] Will K 2 CO 3 and TiO 2 The solids are fully mixed according to a certain molar ratio (1:2~1:4.5), and sintered at a certain temperature (400°C~800°C) for 40h, and taken out every 10h and fully ground once to obtain K 2 Ti 4 o 9 . Take 5g K 2 Ti4O 9 In 100 ml 1 mol L -1 In the hydrochloric acid solution, continuously stirred at 70°C for 3 days, the hydrochloric acid solution was changed once a day, after repeated washing with pure water to neutrality, after vacuum drying, the layered nano-titanic acid H was obtained. 2 Ti 4 o 9 .

[0045] (2) Preparation of nano-carrier intercalated with corrosion inhibitor in step 2 S102

[0046] H 2 Ti 4 o 9 The samples were mixed with 50 ml ethanol solution with a volume fraction of 50% benzotriazole, and placed in a microwave reactor for microwave reaction at a certain power (100W-1000W) for 3h. After...

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Abstract

The invention relates to a preparation method of a self-repair coating based on a corrosion inhibitor intercalated nano-titanate carrier. The preparation method comprises the following steps: preparation of layered nano-titanate, preparation of the corrosion inhibitor intercalated nano-carrier and preparation of the self-repair coating, wherein the preparation of the layered nano-titanate comprises the step of grinding K2CO3 and TiO2 solids according to a certain molar ratio; the preparation of the corrosion inhibitor intercalated nano-carrier comprises the steps of taking organic amines, imidazoles, allyl thiourea and other nitrogen-containing organic matters as objects, taking the layered nano-titanate as a subject, and preparing the collision inhibitor intercalated nano-carrier through intercalation reaction in an ethanol solvent under microwave conditions; the preparation of the self-repair coating comprises the step of finally mixing prepared functional particles with sol-gel to prepare a functional sol-gel film to coat on the surface of a metal to be protected. The preparation method disclosed by the invention has the advantages of simplicity in preparation, large loading capacity and corrosion inhibition release-response function, expands the types of loaded corrosion inhibitors, enables an inherent structure of the titanate to tend to be restored, and plays a self-repair role.

Description

technical field [0001] The invention belongs to the technical field of metal corrosion and protection, in particular to a preparation method of a self-repair coating based on a corrosion inhibitor intercalated nano titanic acid carrier. Background technique [0002] In recent years, the effectiveness of using organic coatings for metal protection has become a consensus. It is generally believed that the protective effect of organic coatings on metal substrates is mainly reflected in the barrier effect of the coating on water and other aggressive particles, as well as special pigments and seasonings. Corrosion inhibition, passivation, cathodic protection and adhesion between the coating and the metal surface. However, the damage caused by the erosion of the natural environment and coating defects is inevitable, and the erosive particles can reach the coating / coating through these defects. substrate interface, eventually leading to coating failure. So is it possible to create...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/08C09D7/12C09D183/08
Inventor 仓辉邵景玲张怀红唐永明陈松许琦
Owner YANCHENG INST OF TECH
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