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Polyaniline modified glass flake heavy-duty anti-corrosive coating and preparation method thereof

A technology of glass flakes and anti-corrosion coatings, applied in the field of coatings, can solve problems such as corrosion, achieve the effects of not being easy to sink, good storage stability, and improving corrosion resistance and permeability resistance

Active Publication Date: 2011-08-17
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a polyaniline modified glass flake epoxy heavy-duty anti-corrosion coating and its preparation method, which solves the problem that most of the existing glass flake anti-corrosion coatings need to be coated with primer on the surface of steel or other metal substrates during construction. To increase the anti-corrosion performance and prevent corrosion at the interface between the coating and the substrate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0055] Prepare polyaniline-modified glass flakes as follows:

[0056] (a) Prepare a mixed aqueous solution of phosphoric acid and phytic acid: phosphoric acid is 1.5 mol / liter; phytic acid is 0.5 mol / liter.

[0057] (b) adding aniline to the mixed aqueous solution of phosphoric acid and phytic acid, and the mixed aniline concentration is: 0.5 mol / liter. Stirring was continued for 0.5 hours. Take 500 ml of a mixed aqueous solution of phosphoric acid, phytic acid and aniline, add 70 g of 240-mesh glass flakes, stir for 10 minutes, and then pre-cool to 8°C.

[0058] (c) Preparation of an aqueous solution of an oxidant: benzoyl peroxide is selected as the oxidant, and the concentration of the prepared benzoyl peroxide is 1.5 mol / liter. The aqueous solution of benzoyl peroxide was pre-cooled to 8°C.

[0059] (d) 500ml solution of (c) was slowly added to 500ml mixed aqueous solution (b) of phosphoric acid, phytic acid and aniline containing glass flakes within 10 to 30 minutes, r...

Embodiment 4-6

[0064] Prepare polyaniline-modified glass flakes as follows:

[0065] (a) Prepare a mixed aqueous solution of phosphoric acid and phytic acid: phosphoric acid is 0.5 mol / liter; phytic acid is 0.1 mol / liter.

[0066] (b) adding aniline to the mixed aqueous solution of phosphoric acid and phytic acid, and the aniline concentration after mixing is: 0.1 mol / liter. Continue stirring for 1.5 hours. Take 500 ml of a mixed aqueous solution of phosphoric acid, phytic acid and aniline, add 20 g of 325-mesh glass flakes, stir for 25 minutes, and then pre-cool to 2°C.

[0067] (c) Prepare an aqueous solution of oxidant: ammonium persulfate is selected as the oxidant, and the concentration of ammonium persulfate is 0.5 mol / liter. The aqueous solution of ammonium persulfate was pre-cooled to 2°C.

[0068] (d) 500ml solution of (c) was slowly added to 500ml mixed aqueous solution (b) of phosphoric acid, phytic acid and aniline containing glass flakes within 10 to 30 minutes, reacted at 2°...

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Abstract

The invention relates to coating technology, in particular to a polyaniline modified glass flake heavy-duty anti-corrosive coating and a preparation method thereof to solve the problems that when the prior glass flake anti-corrosive coatings are constructed, most of the glass flake anti-corrosive coatings require to coat primer on the surface of steel or other metal matrix to improve the corrosion resistance and prevent corrosion between the coat and the interface of the matrix, and the like. The polyaniline modified glass flake heavy-duty anti-corrosive coating comprises epoxy resin, a polyaniline modified glass flake, an amine curing agent and the like. A polyaniline coating layer is formed on the surface of the glass flake by an oxidative polymerization method; the glass flake after the treatment has the passivating effect on metal; and a phytic coating layer on the surface of the glass flake also has the corrosion inhibiting effect on the metal. The polyaniline modified glass flake heavy-duty anti-corrosive coating has strong corrosion resistance and permeability resistance, can be applied to heavy-duty anti-corrosive projects such as petrochemical equipment, pipelines, offshore oil platforms, wharf facilities, shipping and the like, and is particularly suitable for protecting wave splashing zones and tidal difference zones.

Description

technical field [0001] The invention relates to coating technology, in particular to a polyaniline modified glass flake epoxy heavy-duty anti-corrosion coating and a preparation method thereof. Background technique [0002] The Chinese invention patent (patent number ZL91111830.6) proposes a preparation method of glass flake anti-corrosion coating, which consists of epoxy resin, glass flake, solvent, titanate coupling agent and modified amine curing agent. The Chinese Invention Application (Publication No. CN 1789351A) discloses a glass flake plaster coating, which includes vinyl ester resin, glass flakes and additives, and is used in places with high requirements for flue gas desulfurization and anticorrosion. The Chinese invention patent (Patent No. ZL 93117158.X) proposes a preparation method of a boron-modified phenolic resin anti-corrosion composite material containing glass flakes. Chinese invention patent application (publication number CN 1861717A, 1861718A, 1861719...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/02C09D7/12C09D5/08C09C1/28C09C3/10
Inventor 刘福春郝永胜王震宇史洪微韩恩厚柯伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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