Environment-friendly polyaniline modified aluminium powder anti-corrosive coating and preparation method thereof

A technology of anti-corrosion coatings and polyaniline, which is applied in the field of coatings and can solve problems such as poor anti-corrosion performance

Active Publication Date: 2010-02-10
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

[0005] The purpose of the present invention is to provide an environmentally friendly polyaniline modified aluminum powder anticorrosion coating and its preparation method, which solves the problem that the existing aluminum powder coating has poor anticorrosion performance and must

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0061] Example 1

[0062] Prepare polyaniline modified aluminum powder as follows:

[0063] (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.

[0064] (b) Adding aniline to the mixed aqueous solution of phosphoric acid and phytic acid, the concentration of aniline after mixing is 0.5 mol / L. Continue stirring for 0.5 hour. Take 500ml of a mixed aqueous solution of phosphoric acid, phytic acid and aniline, add 70g of 325 mesh aluminum powder, and stir for 10 minutes, then pre-cool to 8°C.

[0065] (c) Preparation of oxidant aqueous solution: benzoyl peroxide is selected as the oxidant, and the concentration of benzoyl peroxide is 1.5 mol / L. The aqueous solution of benzoyl peroxide is pre-cooled to 8°C.

[0066] (d) Add 500ml of (c) solution slowly to 500ml of mixed aqueous solution of phosphoric acid, phytic acid and aniline (b) containing aluminum powder within 10-30 minutes, react at 5°C for 3 hour...

Example Embodiment

[0069] Example 2

[0070] Dispersing agent (Disperbyk190) 0.4 parts, leveling agent (Perenol F40) 1.2 parts, defoaming agent (BYK-066N) 1.1 parts, anti-sagging agent (bentonite) 0.5 parts, pigment (titanium dioxide) 3 parts, filler ( 2 parts of barite powder), 25 parts of 325 mesh polyaniline modified aluminum powder prepared according to the method of Example 1, added to 92 parts of alkyd resin (60% oil linseed oil alkyd resin) and 20 parts of solvent (toluene) It is stirred for 20 minutes, and then ground in a sand mill. After the fineness is less than 45 microns, the material is discharged to make an environmentally friendly polyaniline modified aluminum powder alkyd anticorrosive coating.

[0071] Spray two coats of the coating on the surface of four 150mm×75mm×2mm 45# steel plates treated by conventional sandblasting to Sa2.5 grade, dry at room temperature for 15 days, and then seal with a 60℃ liquid with a weight ratio of rosin: paraffin wax = 1:1 At the same time, conduct c...

Example Embodiment

[0072] Example 3

[0073] Dispersing agent (Disperbyk180) 0.7 parts, leveling agent (BYK-359) 0.8 parts, defoaming agent (Defom 5300) 0.5 parts, anti-sagging agent (bentonite) 0.6 parts, pigment (zinc oxide) 2 parts, filler (talc) Powder) 2 parts, 25 parts of 325 mesh polyaniline modified aluminum powder prepared according to the method of Example 1, added to 50 parts of 2123 phenolic resin (produced by Shanghai Daowang Adhesive Technology Co., Ltd.) and 20 parts of solvent (toluene) , Stir for 20 minutes, and then grind in a sand mill. After the fineness is less than 45 microns, the material is discharged to make an environmentally friendly polyaniline modified aluminum powder phenolic anticorrosive coating.

[0074] Spray the coating twice on the surface of four 150mm×75mm×2mm 45# steel plates treated by conventional sandblasting to Sa2.5 grade, dry for 15 days at room temperature, and then seal with a 60℃ liquid with a weight ratio of rosin: paraffin wax = 1:1 At the same time,...

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PUM

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Abstract

The invention relates to coating technology, in particular to an environment-friendly polyaniline modified aluminium powder anti-corrosive coating and a preparation method thereof to solve the problemthat the prior aluminium powder coating has poor corrosion resistance, and is matched with harmful lead-containing and chromate-containing pigment in the manufacturing process. The environment-friendly polyaniline modified aluminium powder anti-corrosive coating comprises a film forming matter, polyaniline modified aluminium powder and the like. A polyaniline coating layer is formed on the surface of the aluminium powder by an oxidative polymerization method; the treated aluminium powder has passivating effect on metal; and a phytic coating layer on the surface of the aluminium powder also has corrosion inhibiting effect on the metal. The environment-friendly polyaniline modified aluminium powder anti-corrosive coating has strong corrosion resistance and permeability resistance, and can be applied to anti-corrosive projects such as petrochemical equipment, pipelines, offshore oil platforms, wharf facilities, shipping and the like.

Description

technical field [0001] The invention relates to paint technology, in particular to an environment-friendly polyaniline modified aluminum powder anticorrosion paint and a preparation method thereof. Background technique [0002] Aluminum powder is a flaky physical anti-rust pigment with excellent chemical resistance. In anti-rust coatings, aluminum powder has good resistance to water and air penetration due to overlapping and stacking flakes, and has a certain ability to reflect ultraviolet rays. Anti-rust coatings made of aluminum powder are widely used as anti-corrosion protection for bridges, power towers, oil storage tanks, tank cars and construction machinery. [0003] Chinese patent CN86104711 discloses epoxy-chlorinated chloroprene rubber dry and wet dual-purpose coating, is to take epoxy modified chlorinated chloroprene rubber as main adhesive, cyclohexanone-butyl acetate as solvent, aluminum powder, red Tan powder, etc. are used as anti-rust pigments, and T31 curin...

Claims

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Application Information

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IPC IPC(8): C09D167/04C09D161/06C09D163/00C09D175/04C09D127/12C09D123/28C09D115/02C09D7/12C09D5/08C09C1/40C09C3/10
Inventor 刘福春韩恩厚柯伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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