CN112064078A - Preparation method of sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface - Google Patents
Preparation method of sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface Download PDFInfo
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- CN112064078A CN112064078A CN201910497329.6A CN201910497329A CN112064078A CN 112064078 A CN112064078 A CN 112064078A CN 201910497329 A CN201910497329 A CN 201910497329A CN 112064078 A CN112064078 A CN 112064078A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D9/00—Electrolytic coating other than with metals
- C25D9/02—Electrolytic coating other than with metals with organic materials
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F15/00—Other methods of preventing corrosion or incrustation
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/42—Pretreatment of metallic surfaces to be electroplated of light metals
- C25D5/44—Aluminium
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Abstract
The invention belongs to the technical field of functional materials, and relates to a preparation method of a sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface. The invention provides a preparation method of a sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface, and particularly relates to a preparation method of a super-hydrophobic structure by adopting an electrodeposition method. Has the following advantages: on one hand, the aluminum alloy is etched in a linolenic acid medium to construct a rough structure on the surface of the aluminum alloy, on the other hand, the lamellar blocking function of the sulfonated modified graphite oxide is fully exerted, the corrosion inhibition efficiency reaches more than 99 percent, and the method has wide industrial application prospect.
Description
Technical Field
The invention belongs to the technical field of functional materials, and particularly relates to a preparation method of a sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface.
Background
The aluminum alloy has the advantages of small specific gravity, high strength, good physical and chemical properties and cutting performance, stable size, low price, recyclability and the like, and has wide application prospect in the fields of automobiles, electronics, machinery, aviation, aerospace and the like. However, the aluminum alloy has negative electrode potential and active chemical property, and is very easy to corrode in humid atmosphere or neutral salt water solution, so that effective inhibition of corrosion of the aluminum alloy is very necessary for expanding the application of the aluminum alloy.
In recent years, inspired by the lotus effect, the super-hydrophobic surface with a contact angle of more than 150 degrees with a water drop has the strong hydrophobic characteristic that water molecules and corrosive ions are difficult to permeate into the super-hydrophobic surface, so that the corrosion resistance of the metal material is obviously improved.
At present, a super-hydrophobic structure is constructed on the surface of a metal material by the etching action of stearic acid on the metal material, but the super-hydrophobic structure has short service life and is easy to damage after being soaked in a corrosive medium for a long time. The preparation method of the super-hydrophobic surface reported at present either needs harsh equipment or has too long preparation time. Therefore, the preparation method for the simple, efficient and long-life super-hydrophobic aluminum alloy surface has important economic and social significance.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a quick preparation method of a long-life super-hydrophobic aluminum alloy surface, and the super-hydrophobic structure constructed by the method is stable and is particularly suitable for protecting the aluminum alloy in a 3.5% NaCl solution corrosion medium.
The invention provides a preparation method of a sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface, which comprises the following steps:
(1) aluminum alloy pretreatment:
the aluminum alloy is firstly respectively polished by 60-mesh, 120-mesh, 320-mesh, 600-mesh and 1200-mesh sand paper to remove impurities and oxides on the surface, then ultrasonically cleaned by absolute ethyl alcohol and acetone for 10 minutes to remove organic matters, and finally N is added2Drying for later use;
(2) preparing a super-hydrophobic structure by electrodeposition:
the electrolyte formula consists of sulfonated modified graphene oxide, linolenic acid and absolute ethyl alcohol, and the mass fractions of the electrolyte formula are respectively as follows: 20-40% of sulfonated modified graphene oxide, 5-10% of linolenic acid and 50-75% of absolute ethyl alcohol, wherein the sum of the percentage contents of all the components is 100%. The sulfonated modified graphene oxide was purchased from Suzhou high-pass New Material science and technology Co. The preparation method of the sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface provided by the invention has the advantages that the constant potential is 1-5V, the electrodeposition time is 4-8h, and the temperature is 30-50 ℃. On one hand, the invention utilizes linolenic acid to etch the aluminum alloy; on the other hand, the strong adsorption force of the sulfonated modified graphene oxide on the surface of the aluminum alloy is utilized to form a high-blocking-performance film layer to construct a super-hydrophobic surface, so that the super-hydrophobic aluminum alloy has excellent corrosion resistance. The preparation process is simple, the reproducibility is good, expensive equipment is not needed, and the method has wide industrial application prospect.
The invention has the beneficial effects that:
1. the invention provides a preparation method of a sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface, which can obviously improve the corrosion resistance of the sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface in a 3.5% NaCl solution corrosion medium;
2. the invention provides a preparation method of a sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface, wherein linolenic acid and sulfonated modified graphene oxide are adopted as electrolyte, and the obtained film layer has better super-hydrophobic performance;
3. the invention provides a preparation method of a sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface, which has lower applied voltage and can effectively reduce energy consumption;
4. the invention provides a preparation method of a sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface, wherein the electrodeposition time is short, and the super-hydrophobic surface can be constructed in only 8 hours under the voltage of 1V;
5. the invention provides a preparation method of a sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface, and the super-hydrophobic film has longer service life;
6. the invention provides a preparation method of a sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface, which has a super-hydrophobic structure, excellent corrosion resistance and excellent protection effect on an aluminum alloy in a 3.5% NaCl solution corrosion medium;
7. the invention provides a preparation method of a sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface, wherein the preparation method is simple, the energy consumption is low, and the electrolyte formula is non-toxic and pollution-free and can be applied to large-scale industrial application.
Drawings
FIG. 1: contact angle of untreated aluminum alloy;
FIG. 2: the contact angle of the surface of the sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy is shown;
FIG. 3: the electrochemical impedance test result of the untreated aluminum alloy in a 3.5% NaCl solution corrosion medium;
FIG. 4: and (3) performing electrochemical impedance result on the sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy in a 3.5% NaCl solution corrosion medium.
Detailed Description
The invention is further described below with reference to the figures and examples. While the invention will be described in conjunction with the preferred embodiments, it will be understood that they are not intended to limit the invention to the embodiments. On the contrary, the invention is intended to cover alternatives, modifications and equivalents, which may be included within the scope of the invention as defined by the appended claims.
Example 1:
the invention provides a preparation method of a sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface, which comprises the following steps:
(1) aluminum alloy pretreatment:
the aluminum alloy is firstly respectively polished by 60-mesh, 120-mesh, 320-mesh, 600-mesh and 1200-mesh sand paper to remove impurities and oxides on the surface, then ultrasonically cleaned by absolute ethyl alcohol and acetone for 10 minutes to remove organic matters, and finally N is added2Drying for later use;
(2) preparing a super-hydrophobic structure by electrodeposition:
the electrolyte formula consists of sulfonated modified graphene oxide, linolenic acid and absolute ethyl alcohol, and the mass fractions of the electrolyte formula are respectively as follows: 20% of sulfonated modified graphene oxide, 5% of linolenic acid and 75% of absolute ethyl alcohol. The preparation method of the super-hydrophobic aluminum alloy surface provided by the invention has the advantages that the constant potential is 5V, the electro-deposition time is 4 h, and the temperature is 30 ℃.
The contact angle of the surface of the prepared sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy is measured by a contact angle tester, and compared with the aluminum alloy which is not subjected to super-hydrophobic treatment, the result is shown in fig. 1 and 2, and after the surface is treated by the method, the contact angle of the aluminum alloy is higher than 150 degrees.
Example 2:
the invention provides a preparation method of a sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface, which comprises the following steps:
(1) aluminum alloy pretreatment:
the aluminum alloy is firstly respectively polished by 60-mesh, 120-mesh, 320-mesh, 600-mesh and 1200-mesh sandpaper to remove impurities and oxides on the surface, and then absolute ethyl alcohol is usedUltrasonic cleaning with acetone for 10 min to remove organic matter, and treating with N2Drying for later use;
(2) preparing a super-hydrophobic structure by electrodeposition:
the electrolyte formula consists of sulfonated modified graphene oxide, linolenic acid and absolute ethyl alcohol, and the mass fractions of the electrolyte formula are respectively as follows: 40% of sulfonated modified graphene oxide, 10% of linolenic acid and 50% of absolute ethyl alcohol. The preparation method of the super-hydrophobic aluminum alloy surface provided by the invention has the advantages that the constant potential is 1V, the electro-deposition time is 8h, and the temperature is 50 ℃.
Electrochemical impedance test is carried out on the sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy in a 3.5% NaCl solution corrosion medium, and compared with an aluminum alloy which is not subjected to super-hydrophobic treatment, the results are shown in fig. 3, fig. 4 and table 2.
TABLE 2
| Condition | Rct, Ω.cm2 | Corrosion inhibition efficiency% |
| Without super-hydrophobic treatment | 126 | |
| Super-hydrophobic | 13524 | 99.1% |
Claims (9)
1. A preparation method of a sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface is characterized by comprising the following two steps:
(1) aluminum alloy pretreatment:
the aluminum alloy is firstly respectively polished by 60-mesh, 120-mesh, 320-mesh, 600-mesh and 1200-mesh sand paper to remove impurities and oxides on the surface, then ultrasonically cleaned by absolute ethyl alcohol and acetone for 10 minutes to remove organic matters, and finally N is added2Drying for later use;
(2) preparing a super-hydrophobic structure by electrodeposition:
the electrolyte formula consists of sulfonated modified graphene oxide, linolenic acid and absolute ethyl alcohol, and the mass fractions of the electrolyte formula are respectively as follows: 20-40% of sulfonated modified graphene oxide, 5-10% of linolenic acid and 50-75% of absolute ethyl alcohol, wherein the sum of the percentage contents of all the components is 100%.
2. The preparation method of the sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface provided by the invention has the advantages that the constant potential is 1-5V, the electro-deposition time is 4-8h, and the temperature is 30-50 ℃, so that the sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface can be obtained, and the super-hydrophobic aluminum alloy has excellent corrosion resistance in a 3.5% NaCl solution corrosion medium.
3. The method for preparing the sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface according to claim 1, wherein the electrolyte formula consists of the sulfonated modified graphene oxide, linolenic acid and absolute ethyl alcohol.
4. The method for preparing the sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface according to claim 1, wherein the sulfonated modified graphene oxide is purchased from Suzhou high-pass New Material science and technology Co.
5. The method for preparing the sulfonated and modified graphene oxide-based super-hydrophobic aluminum alloy surface according to claim 1, wherein the aluminum alloy is firstly sanded by 60-mesh, 120-mesh, 320-mesh, 600-mesh and 1200-mesh sandpaper respectively to remove impurities and oxides on the surface.
6. The method for preparing the sulfonated and modified graphene oxide-based super-hydrophobic aluminum alloy surface according to claim 1, wherein the aluminum alloy after oil removal is subjected to N treatment2And drying for later use.
7. The method for preparing the sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface according to claim 1, wherein the constant potential is 1-5V.
8. The method for preparing the sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface according to claim 1, wherein the electrodeposition time is 4-8 h.
9. The method for preparing the sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface according to claim 1, wherein the electrodeposition temperature is 30-50 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910497329.6A CN112064078A (en) | 2019-06-10 | 2019-06-10 | Preparation method of sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface |
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| CN201910497329.6A CN112064078A (en) | 2019-06-10 | 2019-06-10 | Preparation method of sulfonated modified graphene oxide-based super-hydrophobic aluminum alloy surface |
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Application publication date: 20201211 |