Polyaniline coating capable of blocking and controlling chlorine ion penetration and preparation method thereof

A technology of chloride ion penetration and polyaniline, applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems of poor anti-corrosion performance of pigments, environmental protection, limited improvement of comprehensive performance of coatings, and no consideration of the synergy of zinc powder, etc., to achieve excellent anti-corrosion performance and improve Chloride ion permeation resistance and effect of permeation resistance improvement

Active Publication Date: 2014-06-04
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent (ZL200810012653.6) introduces a polyaniline modified anti-corrosion coating, which reduces the toxicity of the coating by treating the pigment with polyaniline. The patent (ZL200810012657.4) introduces a polyaniline modified aluminum powder anti-corrosion coating and Its preparation method aims to solve the poor anticorrosion performance of existing aluminum powder coatings and the environmental protection problems of pigments. The defect is that the synergistic effect of zinc powder on aluminum powder is not considered, and the overall performance of the coating is limited.
The important feature of the marine environment is high salinity. Chloride ion is one of the most important factors affecting marine corrosion. The anti-corrosion coating needs to have good corrosion resistance and resistance to chloride ion penetration. At present, this problem has not been effectively solved. Therefore, it is of great significance to develop a coating that can prevent and control the diffusion, migration and penetration of chloride ions in the coating, so as to better protect marine facilities and equipment.

Method used

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  • Polyaniline coating capable of blocking and controlling chlorine ion penetration and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0042] Put 0.5 part of dispersant (BYK-P104S), 1 part of leveling agent (BYK-VP-3609), 1 part of defoamer (BYK-065), 0.5 part of anti-sagging agent (fumed silica), 0.5 part of pigment ( Iron oxide red) 1 part, filler (talc powder) 2 parts, polyaniline 5 parts, chloride ion inhibitor (silver oxide, particle size 0.01-2 micron) 0.02 part, added to 50 parts of epoxy resin (bisphenol A-type epoxy resin (E-12) and 15 parts of solvent (toluene), stir evenly, then grind in a general-purpose paint grinder, and discharge after the fineness is less than 50 microns, to obtain polyaniline that resists and controls chloride ion penetration For component A of epoxy anti-corrosion coating, add 25 parts of amine curing agent (triethylenetetramine) to 75 parts of absolute ethanol, mix and stir until the curing agent is fully dissolved to obtain component B; combine component A and component B Mix and stir for 0.5h at a mass ratio of 1:0.3 to obtain a polyaniline epoxy anticorrosion coating tha...

Embodiment 2

[0045] Put 0.5 part of dispersant (Anti-Terra-P), 1 part of leveling agent (BYK-VP-354), 1 part of defoamer (Defom5400), 1 part of anti-sagging agent (kaolin), pigment (titanium dioxide) 1 part, 2 parts of filler (barite powder), 10 parts of polyaniline, 0.1 part of chloride ion inhibitor (silver oxide, particle size 0.01-2 microns), added to 80 parts of alkyd resin (60% oily coconut oil alkyd resin) and 25 parts of solvent (xylene), stir evenly, and then grind in general-purpose coating equipment, and discharge the material after the fineness is less than 60 microns, and obtain polyaniline alkyd resin anticorrosion that prevents and controls chloride ion penetration The paint is sprayed twice on the surface of four 150mm×100mm×1mm No. 45 steel plates that have been conventionally sandblasted to Sa2.5, dried at room temperature for 15 days, and then sprayed with a 60°C liquid with a weight ratio of rosin:paraffin=l:1 Carry out edge banding and conduct coating performance test....

Embodiment 3

[0047] Put 1.1 parts of dispersant (Disperbykl06), 0.8 parts of leveling agent (PerenolF40), 0.5 parts of defoamer (Defom5300), 1 part of anti-sagging agent (bentonite), 1 part of pigment (litonite), filler (heavy carbonic acid Calcium) 2 parts, polyaniline 10 parts, chloride ion inhibitor (silver oxide, particle size 0.01-2 microns) 0.3 parts, added to 60 parts of rosin-modified phenolic resin and 20 parts of solvent (xylene), Stir evenly, then grind in a general-purpose paint grinder, and discharge the material after the fineness is less than 60 microns, to obtain a polyaniline phenolic resin anticorrosive coating that prevents and controls chloride ion penetration, and four pieces of it are conventionally sandblasted to Sa2.5 The surface of 150mm×100mm×1mm No. 45 steel plate was sprayed with the paint twice, dried at room temperature for 15 days, and then edge-sealed with a 60°C liquid with a weight ratio of rosin:paraffin=l:1, and the coating performance test was carried ou...

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Abstract

The invention discloses a polyaniline coating capable of blocking and controlling chlorine ion penetration and a preparation method thereof. The polyaniline coating capable of blocking and controlling the chlorine ion penetration comprises the following components in parts by weight: 35-85 parts of film forming substance, 1-25 parts of polyaniline, 0.01-10 parts of chlorine ion blocking and controlling agent, 0.1-5 parts of pigment, 1-15 parts of filler, 0.01-2 parts of anti-sag agent, 0.01-2 parts of dispersing agent, 0.01-2 parts of leveling agent, 0.01-0.5 part of defoaming agent and 5-65 parts of solvent. The preparation method comprises steps that components except polyaniline and chlorine ion blocking and controlling agent are uniformly stirred, then polyaniline and chlorine ion blocking and controlling agent are added, then grinding is carried out in a coating grinder and discharging is carried out after fineness is less than 60 microns. The polyaniline coating capable of blocking and controlling the chlorine ion penetration has the advantage that corrosion resistance and chlorine ion penetration resistance are obviously improved and can be applied to heavy corrosion protection projects such as petrochemical equipment, pipelines, oil platforms on the sea, wharf facilities and ships, especially applicable to heavy corrosion coating operation on the sea.

Description

technical field [0001] The invention relates to paint technology, in particular to a polyaniline paint for resisting and controlling chloride ion penetration 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 and gas ga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/08C09D7/12
Inventor 李保松张薇薇张磊于洋
Owner HOHAI UNIV
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