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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 use harmful lead-containing and chromate pigments in the manufacturing process. According to the passivation mechanism of polyaniline on steel, it replaces harmful lead and chromate pigments to achieve the goal of improving the anti-corrosion performance of aluminum powder coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Prepare polyaniline modified aluminum powder as follows:

[0063] (a) Prepare a mixed aqueous solution of phosphoric acid and phytic acid: wherein the phosphoric acid is 1.5 mol / liter; the phytic acid is 0.5 mol / liter.

[0064] (b) Add aniline to the mixed aqueous solution of phosphoric acid and phytic acid, the concentration of aniline after mixing is: 0.5 mol / liter. Stirring was continued for 0.5 hours. Take 500ml of mixed aqueous solution of phosphoric acid, phytic acid and aniline, add 70g of 325 mesh aluminum powder, stir for 10 minutes, then pre-cool to 8°C.

[0065] (c) Prepare an aqueous solution of an oxidizing agent: select benzoyl peroxide as an oxidizing agent, and prepare a concentration of benzoyl peroxide of 1.5 mol / liter. Precool the aqueous solution of benzoyl peroxide to 8°C.

[0066] (d) Slowly add 500ml of solution (c) into 500ml of phosphoric acid, phytic acid and aniline mixed aqueous solution (b) containing aluminum powder within 10-30 minutes,...

Embodiment 2

[0070] Put 0.4 parts of dispersant (Disperbyk190), 1.2 parts of leveling agent (Perenol F40), 1.1 parts of defoamer (BYK-066N), 0.5 parts of anti-sagging agent (bentonite), 3 parts of pigment (titanium dioxide), filler ( Barite powder) 2 parts, 25 parts of 325 order polyaniline modified aluminum powders prepared by the method of embodiment 1, join 92 parts of alkyd resins (60% oily linseed oil alkyd resins) and 20 parts of solvents (toluene) , stirred for 20 minutes, and then ground in a sand mill until the fineness was less than 45 microns, and then discharged to make an environmentally friendly polyaniline modified aluminum powder alkyd anti-corrosion coating.

[0071] Spray two coats of this paint on the surface of four 150mm×75mm×2mm No. 45 steel plates that have been conventionally sandblasted to Sa2.5, dry at room temperature for 15 days, and then seal with a 60°C liquid with a weight ratio of rosin: paraffin wax = 1:1. Edge, coating performance test. The dry film thick...

Embodiment 3

[0073] Put 0.7 parts of dispersant (Disperbyk180), 0.8 parts of leveling agent (BYK-359), 0.5 parts of defoamer (Defom5300), 0.6 parts of anti-sagging agent (bentonite), 2 parts of pigment (zinc oxide), filler (talc powder) 2 parts, 25 parts of 325 mesh polyaniline modified aluminum powders prepared by the method of Example 1, join in 50 parts of 2123 model phenolic resins (produced by Shanghai Daowang Adhesive Technology Co., Ltd.) and 20 parts of solvent (toluene) , stirred for 20 minutes, and then ground in a sand mill until the fineness is less than 45 microns, and then discharged to make an environmentally friendly polyaniline modified aluminum powder phenolic anti-corrosion coating.

[0074] Spray two layers of this paint on the surface of four 150mm×75mm×2mm No. 45 steel plates that have been conventionally sandblasted to Sa2.5, dry at room temperature for 15 days, and then seal with a 60°C liquid with a weight ratio of rosin: paraffin = 1:1. Edge, coating performance t...

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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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