Marine heavy-duty anti-corrosion coating and preparation method thereof

A coating and marine technology, which is applied in the field of marine heavy anti-corrosion coating and its preparation, can solve the problems of incompatibility, unsuitable for industrial production, and the economic benefit needs to be improved, and achieves the effect of facilitating electrical conductivity and improving metal anti-corrosion performance.

Active Publication Date: 2014-08-20
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because polyaniline is insoluble and infusible, its wide application in technology is limited.
Existing polyaniline anti-corrosion coatings mainly include the following two types: (1) Electrochemical formation of polyaniline coatings, but this method is difficult to apply to on-site construction and anti-corrosion treatment of large metal parts, and is not suitable for industrial production
(2) Blend polyaniline with commonly used film-forming resins to prepare composite coatings. This method overcomes the shortcomings of electrochemical polymerization methods and is currently the main research field. improve
However, the composite material prepared by this method only achieves macroscopic physical blending, but cannot make polyaniline into the montmorillonite layer to achieve nanoscale compatibility, so the performance of the material has not been greatly improved.

Method used

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  • Marine heavy-duty anti-corrosion coating and preparation method thereof
  • Marine heavy-duty anti-corrosion coating and preparation method thereof
  • Marine heavy-duty anti-corrosion coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Preparation of B-N coordination polyaniline / montmorillonite composite conductive material

[0052] a. Add 50 parts of CTAB organically modified montmorillonite to 500 parts of 1mol / L organic boric acid solution to disperse, and stir evenly with a mixer at a speed of 800r / min at room temperature to form a suspension system, and continue stirring for 5h. Add 10 parts of aniline monomer to the suspension to carry out aniline intercalation reaction in situ, and continue to stir for 6 hours to fully intercalate. The coordination process of this step is as follows: figure 1 shown;

[0053] b. At room temperature, add an oxidant with the same molar amount as the aniline monomer and 10 parts of bishydroxyphenol derivatives into the aniline emulsion, and react for 8 hours under nitrogen protection;

[0054] c. After the reaction is completed, ultrasonically disperse in water first, and then perform centrifugation. The obtained precipitate is repeatedly washed with deionized...

Embodiment 2

[0058] (1) Preparation of B-N coordination polyaniline / montmorillonite composite conductive material

[0059] a. Add 50 parts of CTAB organically modified montmorillonite to 500 parts of 1mol / L organic boric acid solution to disperse, and stir evenly with a mixer at a speed of 700r / min at room temperature to form a suspension system, and continue stirring for 5h. Add 12 parts of aniline monomer to the suspension for aniline in-situ intercalation reaction, and continue stirring for 6 hours to fully intercalate;

[0060] b. At room temperature, add an oxidant with the same molar amount as the aniline monomer and 15 parts of bishydroxyphenol derivatives into the aniline emulsion, and react for 8 hours under nitrogen protection;

[0061] c. After the reaction is completed, ultrasonically disperse in water first, and then perform centrifugation. The obtained precipitate is repeatedly washed with deionized water and acetone until the filtrate is neutral, and the obtained precipitate...

Embodiment 3

[0065] (1) Preparation of B-N coordination polyaniline / montmorillonite composite conductive material

[0066] a. Add 50 parts of CTAB organically modified montmorillonite to 500 parts of 1mol / L organic boric acid solution to disperse, and stir evenly with a mixer at a speed of 1000r / min at room temperature to form a suspension system, and continue stirring for 5h. Add 15 parts of aniline monomer to the suspension for aniline in-situ intercalation reaction, and continue to stir for 6 hours to fully intercalate;

[0067] b. At room temperature, add an oxidant with the same molar amount as the aniline monomer and 5 parts of bishydroxyphenol derivatives into the aniline emulsion, and react for 8 hours under nitrogen protection;

[0068] c. After the reaction is completed, ultrasonically disperse in water first, and then perform centrifugation. The obtained precipitate is repeatedly washed with deionized water and acetone until the filtrate is neutral, and the obtained precipitate ...

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Abstract

The invention discloses a marine heavy-duty anti-corrosion coating and a preparation method thereof. The coating comprises the following components in parts by weight: 5-15 parts of mica powder, 10-15 parts of B-N ligand polyaniline/montmorillonite composite conductive material, 8-15 parts of talcum powder, 10-15 parts of quartz powder, 30-40 parts of matrix resin, 0-3 parts of pigment, 0.5-1.0 part of defoamer, 0.5-1.0 part of dispersant, 0.5-1.0 part of coalescing agents and 30-40 parts of solvent, wherein the B-N ligand polyaniline/montmorillonite composite conductive material is synthesized by montmorillonite activated and modified by a surfactant, an organic boronic acid, an aniline monomer and double phenolic hydroxyl derivatives; the organic boronic acid is one of a 2-methyl phenyl boronic acid, a 3-methyl phenyl boronic acid, a 4-methyl phenyl boronic acid, a 3,5-dimethylphenylboronic acid, a phenylboronic acid and 4-methoxy benzene boron; the double phenolic hydroxyl derivatives are one of 3,4-gentisic acid methyl ester, 3,4-dihydroxy benzaldehyde and 3,4-dihydroxy benzoic acid ethyl ester. The coating is excellent in corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of heavy-duty anti-corrosion coatings, and relates to a marine heavy-duty anti-corrosion coating and a preparation method thereof. Background technique [0002] With the rapid development of my country's marine economy, the market size of marine coating products is constantly expanding, and the average annual growth rate of demand for marine coatings exceeds 20%. In addition to ships and containers, marine development infrastructure such as cross-sea bridges require a long anti-corrosion period. Marine anti-corrosion is one of the key technologies of marine engineering. Stress corrosion cracking (SCC), hydrogen embrittlement (HE), corrosion fatigue (CF), and intergranular corrosion (IC) caused by metal corrosion in the ocean will cause marine engineering steel The structure breaks suddenly, leading to an ecological disaster in the marine environment and causing huge losses. In addition, the premature failu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/08C09D7/12C08G73/02C08K3/34C08K5/55C09D163/00C09D127/12C09D175/04C09D161/20C09D133/00C09D167/08C09D167/00
Inventor 戴李宗毛杰袁丛辉罗伟昂许一婷叶华立余世荣何凯斌刘新瑜曾碧蓉
Owner XIAMEN UNIV
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