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Environmental-friendly polyaniline modified micaceous iron oxide anticorrosive coating and preparation method thereof

A technology of mica iron oxide and anti-corrosion coatings, 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 mica iron oxide anticorrosion coating and its preparation method, which solves the problem that the existing mica iron oxide coating has poor anticorrosion performance and must use harmful lead and chromic acid in the manufacturing process. The problem of salt pigments, according to the passivation mechanism of polyaniline on steel, replace harmful lead and chromate pigments to achieve the goal of improving the anti-corrosion performance of mica iron oxide coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Prepare polyaniline modified micaceous iron oxide as follows:

[0060] (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.

[0061] (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 mica iron oxide, stir for 10 minutes, then pre-cool to 8°C.

[0062] (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.

[0063] (d) Add (c) 500ml solution slowly into 500ml phosphoric acid, phytic acid and aniline mixed aqueous solution (b) containing micaceous iron oxide within 10-30 minu...

Embodiment 2

[0066] Put 0.5 part of dispersant (Disperbyk115), 1 part of leveling agent (BYK-300), 1 part of defoamer (BYK-066N), 0.5 part of anti-sagging agent (bentonite), 2 parts of pigment (titanium dioxide), filler (barite powder) 2 parts, 25 parts of 325 order polyaniline modified micaceous iron oxides prepared by the method of embodiment 1, join 85 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, and the fineness was less than 40 microns, and then discharged to make a polyaniline modified mica iron oxide alkyd anticorrosive coating. 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 thickness of the paint film is 400±10μm.

Embodiment 3

[0068] Put 1 part of dispersant (Disperbyk180), 0.8 part of leveling agent (BYK-354), 0.5 part of defoamer (Defom5300), 0.6 part of anti-sagging agent (bentonite), 2 parts of pigment (zinc oxide), filler (talc Powder) 2 parts, 25 parts of 325 mesh polyaniline modified micaceous iron oxides prepared by the method of Example 1, join 50 parts of 2123 model phenolic resins (produced by Shanghai Daowang Adhesive Technology Co., Ltd.) and 20 parts of solvent (toluene) , stirring for 20 minutes, and then grinding in a sand mill, the fineness is less than 40 microns, and then the material is discharged to make a polyaniline modified mica iron oxide phenolic anti-corrosion coating. 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 thi...

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Abstract

The invention relates to coating technology, in particular to an environmental-friendly polyaniline modified micaceous iron oxide anticorrosive coating and preparation method thereof, which solves theproblem that the prior micaceous iron oxide coating has poor anticorrosion performance, and needs to be matched with pigments containing lead and chromate during manufacturing. The environmental-friendly polyaniline modified micaceous iron oxide anticorrosive coating comprises film-forming material, polyaniline modified micaceous iron oxide, and the like. As polyaniline coating layers are formedon the surfaces of the micaceous iron oxide by an oxidative polymerization method, the treated micaceous iron oxide has the effect of passivating metal, and phytic-acid coating layers on the surfacesof the micaceous iron oxide play a role in inhibiting corrosion of metal. The environmental-friendly polyaniline modified micaceous iron oxide anticorrosive coating has strong corrosion resistance andpermeation resistance, can be applied to heavy-duty engineering of petrochemical equipment, pipelines, offshore oil platforms, wharf facilities, ships and the like.

Description

technical field [0001] The invention relates to paint technology, in particular to an environment-friendly polyaniline modified mica iron oxide anticorrosion paint and a preparation method thereof. Background technique [0002] Mica iron oxide is a flaky physical anti-rust pigment with excellent chemical resistance. In anti-rust coatings, mica iron oxide 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 micaceous iron oxide 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 be main adhesive with epoxy-modified chlorinated chloroprene rubber, cyclohexanone-butyl acetate is made solvent, micaceous iron oxide, Red lead powder, etc. are used as anti-rust pigment...

Claims

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Application Information

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