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A water-based carbon steel surface treatment agent based on polypyrrole/graphene composite

A surface treatment agent and composite material technology, applied in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve problems such as difficulty in uniform dispersion and failure to fully exert the anti-corrosion effect of single-layer graphene, and achieve an increase in specific surface area , Avoid the decline of water resistance, improve the effect of easy aggregation

Active Publication Date: 2020-01-17
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because graphene is easy to accumulate and its surface is highly hydrophobic, it is difficult to disperse evenly in water-based resins, so solvent-based systems or graphene oxide are often used.
Although graphene is used as a filler in anti-corrosion coatings, the anti-corrosion effect of single-layer graphene cannot be fully exerted.

Method used

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  • A water-based carbon steel surface treatment agent based on polypyrrole/graphene composite
  • A water-based carbon steel surface treatment agent based on polypyrrole/graphene composite
  • A water-based carbon steel surface treatment agent based on polypyrrole/graphene composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The mass percent of the water-based carbon steel surface treatment agent is: graphene / polypyrrole composite material, 0.06%; organosiloxane modified resin, 15%; phosphoric acid, 0.2%; ammonia water, appropriate amount; the balance is deionized water. The pH value of the surface treatment agent is 5.

[0034] Pyrrole is added to the styrene-maleic anhydride copolymer functionalized graphene water dispersion, wherein the mass ratio of graphene to pyrrole is 1:1, after stirring for 30min, slowly add the oxidant ammonium persulfate aqueous solution dropwise, wherein the ammonium persulfate The molar ratio with pyrrole is 1:1. After reacting for 24 hours, add acid to flocculate, and obtain the polypyrrole / graphene composite material by high-speed centrifugation, wash with water until the centrifuged supernatant is colorless, and finally ultrasonically disperse the polypyrrole / graphene composite material in In water with a pH of about 9, a stable graphene / polypyrrole composit...

Embodiment 2

[0036] The mass percent of the water-based carbon steel surface treatment agent is: graphene / polypyrrole composite material, 0.10%; polyurethane resin, 25%; sodium metavanadate, 0.4%; acetic acid, appropriate amount; the balance is deionized water. The surface treatment agent has a pH value of 7.

[0037] Pyrrole is added to the styrene-maleic anhydride copolymer functionalized graphene aqueous dispersion, wherein the mass ratio of graphene to pyrrole is 1:5, after stirring for 30min, slowly add the oxidant ammonium persulfate aqueous solution dropwise, wherein the ammonium persulfate The molar ratio with pyrrole is 1:1. After reacting for 24 hours, add acid to flocculate, and obtain the polypyrrole / graphene composite material by high-speed centrifugation, wash with water until the centrifuged supernatant is colorless, and finally ultrasonically disperse the polypyrrole / graphene composite material in In water with a pH of about 9, a stable graphene / polypyrrole composite water ...

Embodiment 3

[0039] The mass percent of the water-based carbon steel surface treatment agent is: graphene / polypyrrole composite material, 0.06%; organosiloxane modified resin, 15%; sodium molybdate, 0.02%; acetic acid, appropriate amount; the balance is deionized water . The pH value of the surface treatment agent is 5.

[0040] Pyrrole is added to the styrene-maleic anhydride copolymer functionalized graphene water dispersion, wherein the mass ratio of graphene to pyrrole is 1:1, after stirring for 30min, slowly add the oxidant ammonium persulfate aqueous solution dropwise, wherein the ammonium persulfate The molar ratio to pyrrole is 1:1. After reacting for 24 hours, add acid for flocculation, high-speed centrifugation to obtain the polypyrrole / graphene composite, wash with water until the centrifuged supernatant is colorless, and finally ultrasonically disperse the polypyrrole / graphene composite in In water with a pH of about 9, a stable graphene / polypyrrole composite water dispersion ...

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Abstract

The invention discloses a waterborne carbon steel surface treatment agent based on a polypyrrole / graphene composite material and belongs to the field of metal surface treatment technology. The waterborne carbon steel surface treatment agent comprises the following ingredients (by weight): 0.02-0.15% of a polypyrrole / graphene composite material, 15-25% of organic resin, 0-0.4% of an inorganic inhibitor, a proper amount of a pH regulator and the balance deionized water. The content of each ingredient is the content of each solid component in the surface treatment agent. The pH value of the surface treatment agent is 5-8. The polypyrrole / graphene composite material is styrene-maleic anhydride copolymer functionalized graphene stable polypyrrole aqueous dispersion. The prepared waterborne carbon steel surface treatment agent is formed by compounding a stable polypyrrole / graphene aqueous dispersion and organic resin and adding the inorganic inhibitor for compounding, and can act on the surface of carbon steel to form a protective film with excellent corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, and in particular relates to an environment-friendly surface treatment agent for improving the corrosion resistance of carbon steel surfaces. Background technique [0002] Carbon steel is the earliest and most used basic material in modern industry. However, compared with copper, aluminum and stainless steel, which have their own passivation function, the passivation effect of carbon steel itself is very poor, and it is easy to be corroded especially in solution or hot and humid atmospheric environment. Therefore, it is of great significance to study the corrosion protection of carbon steel. Traditional corrosion protection measures include electrochemical protection method, metal protective layer method, corrosion inhibitor method, etc. Among many corrosion protection technologies, organic coating protection on metal surfaces has attracted widespread attention due to its economy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D201/00C09D175/04C09D5/08
CPCC08K2003/329C09D5/08C09D175/04C09D201/00C08L79/04C08K9/08C08K3/04C08K3/32C08K3/24C08K5/09
Inventor 陈均陈宇卢海艳
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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