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Environmentally-friendly anticorrosive composite coating

A composite coating and environmental protection technology, applied in the field of coatings, can solve the problems of poor solubility and limited application, and achieve the effect of low VOC, excellent anti-corrosion performance and high solid VOC

Inactive Publication Date: 2019-01-08
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the extremely poor solubility of PANI, its application as a corrosion inhibitor in acidic environments is severely limited.

Method used

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  • Environmentally-friendly anticorrosive composite coating

Examples

Experimental program
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Effect test

preparation example Construction

[0020] Further, the preparation method of the above-mentioned environment-friendly anticorrosive composite coating comprises the following steps:

[0021] Step 1: dissolving the sodium lignosulfonate and phosphoric acid in a molar ratio of 0.1-1.5:0.1-1 in deionized water to obtain a reaction solution;

[0022] Step 2: adding the monomeric reactant to the reaction liquid and stirring evenly to obtain a mixed reactant, wherein the molar ratio of the monomeric reactant to sodium lignosulfonate is 0.5-3:0.5-3;

[0023] Step 3: dissolving ammonium persulfate in deionized water and then adding it to the mixed reactant to react for 10-12 hours to obtain a reaction product, wherein the molar ratio of ammonium persulfate to sodium lignosulfonate is 0.1-1:0.2 -2;

[0024] Step 4: Add the reaction product dropwise to an organic solvent and stir to separate out a solid precipitate, filter to obtain a precipitated crude product, wash and suction filter the precipitated crude product, and...

Embodiment 1

[0032] Dissolve 0.1mol sodium lignosulfonate and 0.1mol phosphoric acid in ionized water to obtain a reaction solution and add it to the reaction vessel, then add 0.1mol aniline to the reaction solution and stir to obtain a mixed reactant, dissolve 0.05mol ammonium persulfate The ammonium persulfate solution obtained in deionized water was added to the mixed reactant, the reaction temperature was 4°C, and the reaction time was 10 hours to obtain the reaction product, then the reaction product was added dropwise to acetone and stirred, and a solid precipitate was precipitated, and the precipitate was obtained after filtration The crude product was washed and filtered by suction and then vacuum-dried. The vacuum drying temperature was 50° C. and the drying time was 24 hours to obtain a water-based polyaniline anti-corrosion additive. The water-based polyaniline anti-corrosion additive included polyaniline Polyaniline and modifiers sodium lignosulfonate, phosphoric acid and ammoni...

Embodiment 2

[0035] Dissolve 0.5mol sodium lignosulfonate and 0.25mol phosphoric acid in ionized water to obtain a reaction solution and add it to the reaction vessel, then add 2mol aniline to the reaction solution and stir to obtain a mixed reactant, and dissolve 0.25mol ammonium persulfate in The ammonium persulfate solution obtained in deionized water was added to the mixed reactant, the reaction temperature was 2°C, and the reaction time was 10 hours to obtain the reaction product, then the reaction product was added dropwise to acetone and stirred, and a solid precipitate was precipitated, and the precipitate was obtained after filtration. The precipitated crude product was washed and suction-filtered and then vacuum-dried. The vacuum drying temperature was 55° C. and the drying time was 24 hours to obtain a water-based polyaniline anti-corrosion additive. The water-based polyaniline anti-corrosion additive includes poly Aniline and modifiers sodium lignosulfonate, phosphoric acid and ...

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Abstract

The invention relates to the field of coatings, in particular to an environmentally-friendly anticorrosive composite coating. The environmentally-friendly anticorrosive composite coating comprises thefollowing components in parts by weight: 100-150 parts of resin matrix, 10-15 parts of a waterborne polyaniline anticorrosive additive and 2-10 parts of deionized water, wherein the resin matrix is raw lacquer or waterborne resin; the waterborne polyaniline anticorrosive additive comprises polyaniline or a polyaniline derivative; the waterborne polyaniline anticorrosive additive further comprisesa modifying agent; the modifying agent can be sodium ligninsulfonate, phosphoric acid and ammonium persulfate. The environmentally-friendly anticorrosive composite coating has the benefits that: through the addition of the waterborne polyaniline anticorrosive additive into the raw lacquer or the waterborne resin, the composite anticorrosive coating has excellent anticorrosive performance, meanwhile, the coating has high solid content and low VOC and is the environmentally-friendly anticorrosive composite coating.

Description

technical field [0001] The invention relates to the field of coatings, in particular to an environment-friendly anti-corrosion composite coating. Background technique [0002] Metal materials, as one of the basic materials in construction, manufacturing and various heavy industries, play an irreplaceable and important role. When a metal material is exposed to a certain environment (such as temperature, humidity, and pH value of the environment), a chemical or electrochemical reaction will occur between the metal and the surrounding environment, and the process of damage and loss of the metal material will occur. Metal corrosion is the most serious problem existing in metal materials. It generally exists in the fields of national defense construction and national economic construction, seriously restricts the application range and service life of metals, and directly or indirectly causes huge national economic losses. According to relevant statistics, about 100 million tons ...

Claims

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Application Information

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IPC IPC(8): C09D193/00C09D163/00C09D167/00C09D127/12C09D175/04C09D161/20C09D183/04C09D167/08C09D161/06C09D133/04C09D5/08C09D7/20
CPCC08K2003/329C08L2205/03C09D5/08C09D7/20C09D127/12C09D133/04C09D161/06C09D161/20C09D163/00C09D167/00C09D167/08C09D175/04C09D183/04C09D193/00C08L79/02C08L97/00C08K3/32
Inventor 魏方芳邓雅君徐艳莲
Owner FUJIAN NORMAL UNIV
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