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A kind of environment-friendly polyaniline modified zinc-aluminum flake anticorrosion coating and preparation method thereof

A technology of anti-corrosion coatings and polyaniline, applied in the field of coatings, can solve the problems of limited improvement of coating corrosion resistance, limited improvement of coating corrosion resistance, and difficulty in satisfying anti-corrosion performance, etc., to prolong the time of medium penetration and improve corrosion resistance , Improve the effect of comprehensive protection performance

Active Publication Date: 2016-04-06
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent (ZL200810012657.4) introduces a polyaniline modified aluminum powder anti-corrosion coating and its preparation method, aiming to solve the problems of poor anti-corrosion performance of existing aluminum powder coatings and environmental protection of pigments. The disadvantage is that the improvement of coating corrosion resistance is limited, although The aluminum powder flake-like stacked structure and the ability to reflect ultraviolet rays help to improve the water vapor permeability and weather resistance of the coating. The improvement is limited. In the harsh marine corrosive environment, its anti-corrosion performance is difficult to meet the requirements of high-performance protective coatings
The anti-corrosion coating in the marine environment needs to have good corrosion resistance, anti-permeability, good mechanical properties, adhesion and resistance to seawater erosion and abrasion. At present, this problem has not been effectively solved. Therefore, the research and development of a A heavy-duty anti-corrosion coating with good environmental protection and better protection effect on the substrate is an urgent need for marine anti-corrosion

Method used

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  • A kind of environment-friendly polyaniline modified zinc-aluminum flake anticorrosion coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Mix 35 parts of zinc powder flakes with 65 parts of aluminum powder flakes to prepare zinc-aluminum flakes. The thickness of the scales is 0.1 μm, and the diameter is 10 μm;

[0052] Mix 0.5 mole of aniline and 1 mole of perchloric acid and stir evenly, then set the volume to 1 liter; then uniformly add 0.3 mole of ammonium persulfate into the aniline-doped acid solution within 30 minutes, and stir at 10°C for 0.5 hours to obtain the product polyaniline. Then mix 1 part of the prepared polyaniline with 5 parts of zinc-aluminum flakes, continue stirring for 3 hours, centrifuge, wash with distilled water, dry at 80°C for 2 hours, grind with a mortar, and sieve to obtain dark green polyaniline. Aniline modified zinc aluminum flakes.

[0053] Put 0.01 part of dispersant (BYK-P104S), 0.05 part of leveling agent (BYK-VP-3609), 0.5 part of defoamer (BYK-065), 0.5 part of anti-sagging agent (fumed silica), 0.5 part of pigment ( Iron oxide red) 2.5 parts, filler (talc powder)...

Embodiment 2

[0056] Put 0.5 part of dispersant (Anti-Terra-P), 1 part of leveling agent (BYK-VP-354), 0.2 part of defoamer (Defom5400), 1 part of anti-sagging agent (kaolin), pigment (titanium dioxide) 3 parts, 6 parts of filler (barite powder), 30 parts of polyaniline modified zinc-aluminum flakes prepared according to the method of embodiment 1, join 80 parts of alkyd resin (60% oily coconut oil alkyd resin) and 25 parts Solvent (xylene), stir evenly, and then grind in a paint grinder until the fineness is less than 60 microns, and discharge to obtain polyaniline modified zinc-aluminum flake alkyd resin anti-corrosion coating.

[0057] Spray two coats of this paint on the surface of four 150mm×100mm×1mm No. 45 steel plates that have been conventionally sandblasted to Sa2.5, dry at room temperature for 15 days, and then use a 60°C liquid with a weight ratio of rosin:paraffin=l:1 for edge sealing , for coating performance testing. The dry film thickness of the paint film is 500±10μm.

Embodiment 3

[0059] Put 1.1 parts of dispersant (Disperbykl06), 0.8 parts of leveling agent (PerenolF40), 0.5 parts of defoamer (Defom5300), 1.3 parts of anti-sagging agent (bentonite), 2 parts of pigment (litonite), filler (heavy carbonate Calcium) 1 part, 32 parts of polyaniline-modified zinc-aluminum flakes prepared according to the method of Example 1, join in 60 parts of rosin-modified phenolic resins and 20 parts of solvent (xylene), stir evenly, then in the coating grinder Grinding in the middle, the fineness is less than 60 microns, and the material is discharged to obtain an environmentally friendly polyaniline modified zinc-aluminum flake phenolic resin anti-corrosion coating.

[0060] Spray two layers of this coating on the surface of four 150mm×100mm×1mm No. 45 steel plates that have been conventionally sandblasted to Sa2.5, dry at room temperature for 15 days, and then use a 60°C liquid with a weight ratio of rosin:paraffin=l:1 for edge sealing , for coating performance testin...

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Abstract

The invention discloses an environment-friendly polyaniline modified zinc-aluminum scale corrosion resistant coating and a preparation method thereof. The coating comprises a film forming matter, a polyaniline modified zinc-aluminum scale, a pigment, a filler, an anti-sag agent, a dispersant, a flatting agent, a defoamer and a solvent. The preparation method comprises the following steps: adding the dispersant, the flatting agent, the defoamer, the anti-sag agent, the pigment and the filler into the film forming matter and the solvent, and uniformly stirring; adding the polyaniline modified zinc-aluminum scale under stirring into the obtained film forming matter mixture; then, grinding in a coating grinding machine; after the fineness is less than 60 microns, discharging to obtain the environment-friendly polyaniline modified zinc-aluminum scale corrosion resistant coating. The corrosion resistance, the aging resistance and the penetration resistance of the coating system are remarkably improved, and the coating can be applied to heavy duty engineering in the fields of petrochemical equipment, pipelines, offshore petroleum 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 zinc-aluminum flake anticorrosion paint and a preparation method thereof. Background technique [0002] The marine environment is a complex and harsh corrosive environment. Seawater itself is a strong corrosive medium. At the same time, marine engineering facilities and equipment will be subjected to low-frequency reciprocating stress and impact caused by waves, waves, tides and currents in the marine environment, plus marine microorganisms, attached organisms and their metabolism. Products, etc. have a direct or indirect acceleration effect on the corrosion process, and the service life of various steel structures is much lower than that of the general inland outdoor environment. As the country speeds up infrastructure construction projects, a large number of major projects such as offshore survey platforms, oil production platforms, offshore oil ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/02C09D167/08C09D161/14C09D127/12C09D175/04C09D179/02C09D5/10C08G73/02
Inventor 李保松张薇薇吴玉萍
Owner HOHAI UNIV
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