A kind of graphene corrosion-inhibiting coating preparation method for stainless steel surface
Technical field:
The invention belongs to carbon nanomaterial preparation technology field, is related to a kind of ion sputtering process and prepares graphene corrosion-inhibiting coating
Technique, particularly a kind of graphene corrosion-inhibiting coating preparation method for stainless steel surface, the graphene coating antiseptic of preparation
Excellent performance.
Background technology:
Graphene is a kind of new carbon, has excellent heat conduction and electric conductivity, high transparency, high intensity, also has
The many advantages such as abundant raw material, small toxicity, biocompatibility, lead in pharmaceutical carrier, energy storage, sensor preparation, optics, catalysis etc.
Domain has great application value.Stainless steel has the excellent characteristics such as preferable intensity, higher wearability, therefore extensively should
Various aspects for lives such as pipeline, public utility, highways.Annual China is because of Corrosion of Stainless Steel, and the economy suffered
Loss is up to exceeded 100 billion, therefore becomes a kind of necessary come the antiseptic property of hardened stainless steel to reduce economic loss by coating
Measure.Report at present on hardened stainless steel antiseptic property method is very much, mainly including zinc, chromium, clay-like material cladding
Deng these materials being employed often have certain injury to environment and human body or have water imbibition, it is difficult to realize a wide range of
Application and efficient anti-corrosion.Therefore, a kind of quick, simple, cheap, nontoxic, isolation water and air high efficiency coating system is explored
It is standby to be highly desirable, the advantages such as ion sputtering process has device relative to other methods such as electrochemical process and manufacturing process is simple,
It is that what is grown up in recent years prepare a kind of very important method of high-quality thin film, it has other technologies incomparable
Advantage, in film-forming process, deposition velocity is slow, the thickness of film and quality are easy to control.Therefore, comprehensive grapheme material itself is excellent
The preparation of different antiseptic property and ion sputtering process high-quality thin film, seeks a kind of graphene anti-corrosion for stainless steel surface and applies
Layer preparation method, in the preparation process of coating, graphene sheet layer, which is broken, to diminish, it can be achieved that the dense packing of higher degree,
Stainless steel is set to reach efficient water proof and exhausted gas.
The content of the invention:
It is an object of the invention to overcome the prior art and raw material there are the shortcomings that, seek design and a kind of be used for not be provided
The graphene corrosion-inhibiting coating preparation method for steel surface of becoming rusty, prepares graphene corrosion-inhibiting coating, the stone prepared based on ion sputtering process
Black alkene corrosion-inhibiting coating have the advantages that stablize, efficiently, small toxicity, isolation water and air, can hardened stainless steel antiseptic property.
To achieve these goals, the technique of the invention for preparing graphene corrosion-inhibiting coating specifically includes following steps:
(1), using native graphite as raw material, graphene powder is prepared by oxidation-reduction method, then to Graphene powder
End is freeze-dried, and first will react 12 at 30 degrees Celsius after 0.1g graphite, 0.3g potassium permanganate, and the mixing of the 90ml concentrated sulfuric acids
Hour obtains graphite oxide, will be dissolved in after obtained graphite oxide centrifuge washing in 200ml distilled water, and it is micro- then to add 100
Rise hydrazine hydrate, when 95 degrees Celsius of lower reductase 12s are small after obtained sample centrifuged, be freeze-dried, obtain graphene powder;
(2), graphene powder is placed in tablet press machine, graphene powder is pressed into by graphene film with the pressure of 30Mpa;
(3), graphene film prepared by step (2) is placed on the top of stainless steel base, graphene film be used as from
The target of son sputtering, ion sputtering, the graphene film after ion sputtering are carried out using energetic ion rifle to graphene film
The broken surface that stainless steel sample is covered in so as to uniform deposition, graphene corrosion-inhibiting coating is made in stainless steel sample surfaces,
The accelerating potential of wherein ion sputtering is arranged to 300V, in deposition process the air pressure of argon gas and flow velocity be respectively 0.04Pa and
4cm3/ min, sputtering time are arranged to 1h, 2h, 3h or 5h.
Oxidizing process of the present invention is improved HUMMERS methods, and reduction method is carried out thoroughly also by hydrazine hydrate reduction agent
It is former.
The present invention is characterized as the graphene corrosion-inhibiting coating to obtained by using means of different, and used means include
Scanning electron microscope (SEM), x-ray photoelectron spectroscopy (XPS).
The present invention, with electrochemical methods such as polarization curve and electrochemical impedances, prevents material by electrochemical workstation
Rotten performance is detected, and has the polarization curve forward migration of the sample of graphene corrosion-inhibiting coating, and corrosion current reduces, while electricity
Chemical impedance becomes larger, this shows the raising of antiseptic property, and the corrosion rate of stainless steel is reduced to by 0.019mm/year
0.00138mm/year, reduces 12.76 times.
Compared with prior art, the present invention has the following advantages:First, the graphene corrosion-inhibiting coating prepared is uniform, thickness is easy
It is simple in control, the device used;Second, preparation efficiency is high, the time for completing primary first-order equation is shorter, it is only necessary to 30-60min;Third,
Energy consumption is low, and graphene makes low in raw material price, and ion sputtering energy consumption is low;Fourth, graphene corrosion-inhibiting coating is in stainless steel surface heap
Product is close, and antiseptic property is superior, and corrosion rate is reduced to 0.00138mm/year by 0.019mm/year, reduces 12.76 times,
And stainless steel preservative efficiency can keep more than 90%;Fifth, graphene corrosion-inhibiting coating is applied to stainless steel antiseptic property
Strengthen, prepare and stablize, reproducible, efficient, the carbon quantum dot quality of preparation is good, and performance is stablized.
Brief description of the drawings:
Fig. 1 is that the present invention prepares the apparatus structure principle schematic of graphene corrosion-inhibiting coating, including energetic ion rifle,
Graphene film, stainless steel base.
Fig. 2 is that the SEM of graphene corrosion-inhibiting coating prepared by the present invention schemes (D), the SEM of pure stainless steel schemes (A and B) and not
Rust steel surface has corrosion-inhibiting coating and the comparison diagram (C) without corrosion-inhibiting coating.
Fig. 3 is that the XPS of stainless steel sample with graphene corrosion-inhibiting coating prepared by the present invention and pure stainless steel sample schemes.
Fig. 4 is that the embodiment of the present invention has the stainless steel sample of corrosion-inhibiting coating and pure stainless steel sample TAFEL curve maps
(A), corrosion rate figure (B), open-circuit voltage figure (C) and preservative efficiency figure (D).
Embodiment:
The invention will be further described by way of example and in conjunction with the accompanying drawings.
Embodiment 1:
The technique that the present embodiment prepares graphene corrosion-inhibiting coating specifically includes following steps:
(1), using native graphite as raw material, graphene powder is prepared by oxidation-reduction method, then to Graphene powder
End is freeze-dried, and first will react 12 at 30 degrees Celsius after 0.1g graphite, 0.3g potassium permanganate, and the mixing of the 90ml concentrated sulfuric acids
Hour obtains graphite oxide, will be dissolved in after obtained graphite oxide centrifuge washing in 200ml distilled water, and it is micro- then to add 100
Rise hydrazine hydrate, when 95 degrees Celsius of lower reductase 12s are small after obtained sample centrifuged, be freeze-dried, obtain graphene powder;
(2), graphene powder is placed in tablet press machine, graphene powder is pressed into by graphene film with the pressure of 30Mpa;
(3), graphene film prepared by step (2) is placed on the top of stainless steel base, graphene film be used as from
The target of son sputtering, ion sputtering, the graphene film after ion sputtering are carried out using energetic ion rifle to graphene film
The broken surface that stainless steel sample is covered in so as to uniform deposition, graphene corrosion-inhibiting coating is made in stainless steel sample surfaces,
The accelerating potential of wherein ion sputtering is arranged to 300V, in deposition process the air pressure of argon gas and flow velocity be respectively 0.04Pa and
4cm3/min。
The time of the present embodiment control ion sputtering is respectively 2h, 3h and 5h, so as to fulfill the control of corrosion-inhibiting coating thickness,
Experimental result shows, during 3h, corrosion-inhibiting coating thickness is suitable, and anti-corrosion effect reaches optimum efficiency.