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A kind of preparation method of metal anticorrosion graphene composite coating

A graphene composite, metal anti-corrosion technology, applied in anti-corrosion coatings, coatings, devices for coating liquids on surfaces, etc., can solve problems such as difficult and defect-free graphene films, restricting development, etc. Uniform, controllable thickness

Active Publication Date: 2020-07-31
BEIJING SCITECH GRAPHENE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, the main preparation methods of graphene coatings on metal surfaces are CVD and redox methods, but these methods are difficult to achieve large-scale preparation of large-area defect-free graphene films, which still restricts its application in the field of metal anti-corrosion. the bottleneck of development

Method used

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  • A kind of preparation method of metal anticorrosion graphene composite coating
  • A kind of preparation method of metal anticorrosion graphene composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of metal anti-corrosion graphene coating:

[0030] (1) take natural graphite as raw material, obtain concentration by the method for mechanical stripping and be 0.1wt% graphene cyclopentanone dispersion liquid, wherein the thickness 3nm of graphene sheet, particle diameter is 1000nm;

[0031] (2) disperse and drop the graphene of step (2) on the ethanol surface, form a layer of uniform graphene film on the polar solvent surface;

[0032] (3) The carbon steel sheet is cleaned to remove the oil stain on the surface to make it form a hydrophilic surface;

[0033] (4) insert the carbon steel sheet after cleaning into step (2) in the solution containing graphene layer, carry out the interfacial transfer of film, obtain uniform graphene coating on carbon steel surface;

[0034] (5) Treat the carbon steel sheet covered with graphene at 300° C. for 6 hours in an argon atmosphere to obtain a corrosion-resistant graphene coating.

[0035] Use scanning electron micro...

Embodiment 2

[0038] Preparation of metal anti-corrosion graphene coating:

[0039](1) take natural graphite as raw material, obtain concentration by the method for mechanical stripping and be 1wt% graphene ethyl acetate dispersion liquid, wherein the thickness 4nm of graphene sheet, particle diameter is 6000nm;

[0040] (2) disperse and drop the graphene of step (2) on the water surface, form a layer of uniform graphene film on the polar solvent surface;

[0041] (3) the copper-zinc alloy sheet is cleaned to remove the oil stain on the surface to make it form a hydrophilic surface;

[0042] (4) insert the copper-zinc alloy sheet after cleaning into the solution containing the graphene layer in step (2), carry out the interfacial transfer of the film, and obtain a uniform graphene coating on the surface of the copper-zinc alloy sheet;

[0043] (5) Treat the copper-zinc alloy sheet covered with graphene at 600° C. for 2 hours in a helium atmosphere to obtain a corrosion-resistant graphene c...

Embodiment 3

[0046] Preparation of metal anti-corrosion graphene coating:

[0047] (1) take natural graphite as raw material, obtain concentration by the method for mechanical stripping and be 0.5wt% graphene acetone dispersion liquid, wherein the thickness 1nm of graphene sheet, particle diameter is 100nm;

[0048] (2) disperse and drop the graphene of step (2) on the surface of acetone, form a layer of uniform graphene film on the polar solvent surface;

[0049] (3) the nickel rod is cleaned to remove the oil stain on the surface to make it form a hydrophilic surface;

[0050] (4) insert the cleaned nickel rod into the solution containing the graphene layer in step (2), carry out the interfacial transfer of the film, and obtain a uniform graphene coating on the surface of the nickel rod;

[0051] (5) Treat the nickel rod covered with graphene at 400° C. for 5 hours in an argon atmosphere to obtain a corrosion-resistant graphene coating.

[0052] The prepared graphene coating has a thic...

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Abstract

A method for preparing an anticorrosion graphene composite coating for metal comprises the following steps: (1)using graphite as a raw material and preparing a graphene dispersion of the concentration of 0.1wt% to 1wt%; (2) dropping the graphene dispersion to the surface of a polar solvent to form a graphene thin-film layer on the surface of the polar solvent; (3) cleaning a single metal or alloy to form a hydrophilic surface; (4) inserting the cleaned single metal or alloy into a solution containing the graphene layer in step (2), and transferring the interface of the thin film, so as to obtain a graphene coating; and (5) treating a metal sheet covered with the graphene coating for 2 hours at a high temperature in an inert gas environment, so as to obtain an anticorrosion graphene coating for metal. The graphene coating is coated on the surface of a metal or alloy by using the interfacial transfer method, and the prepared graphene coating has the advantages of stability, high efficiency, non-toxicity, isolation from water and air, and the like.

Description

technical field [0001] The invention relates to the field of nanomaterials, in particular to a method for preparing a metal anti-corrosion graphene composite coating. Background technique [0002] Metal corrosion is a very serious global problem, which has caused direct losses to the national economy. Therefore, scientists from all over the world are working hard to find effective metal protection techniques. Corrosion originates from the contact of the surface of the metal with air, water or other substances. Currently, the commonly used anti-corrosion method is to use protective layers such as inert metals, conductive polymers, and monomolecular layers of mercapto groups. However, these protective layer materials have their own advantages and disadvantages. self-limiting. Self-assembled thiol monolayers on metal surfaces cannot withstand temperatures above 100 °C; while polymer coatings are relatively thick, which can significantly change the physical properties of the un...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D7/14B05D3/02C09D1/00C09D5/08
CPCB05D3/0254B05D7/14B05D2202/10B05D2202/25B05D2202/45C09D1/00C09D5/08B05D3/02
Inventor 朱英
Owner BEIJING SCITECH GRAPHENE TECH CO LTD