CN108468041A - The method with corrosion-resistant function self-assembled composite film is prepared in aluminum alloy surface - Google Patents
The method with corrosion-resistant function self-assembled composite film is prepared in aluminum alloy surface Download PDFInfo
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- CN108468041A CN108468041A CN201810152791.8A CN201810152791A CN108468041A CN 108468041 A CN108468041 A CN 108468041A CN 201810152791 A CN201810152791 A CN 201810152791A CN 108468041 A CN108468041 A CN 108468041A
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- corrosion
- aluminum alloy
- alloy surface
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- resistant function
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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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/02—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using non-aqueous solutions
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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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/78—Pretreatment of the material to be coated
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Abstract
The invention discloses a kind of the method with corrosion-resistant function self-assembled composite film is prepared in aluminum alloy surface.Alloy matrix aluminum is washed successively, polishes, polish, the pretreatments such as ultrasonic wave water washing, last drying for standby；Configure self assembly solution, reduced graphene is added, ultrasonic wave disperses, mixed solution is made, then the aluminium alloy after pre-treatment is immersed in mixed solution after impregnating and is taken out, it is put into ultrasonic cleaning in deionized water to remove the unreacted small molecule of aluminum alloy surface and solvent finally to cure in vacuum drying chamber, that is, realizes to prepare that there is corrosion-resistant function self-assembled composite film in aluminum alloy surface.The method of the present invention is at low cost, and preparation process is simple, and prepared self-assembled film has high impedance, low corrosion current density, and binding force is good on alloy matrix aluminum, can improve aluminium alloy surface anti-corrosion erosion ability well, and do not pollute to environment and equipment.
Description
Technical field
It is the invention belongs to metal material surface electrochemical corrosion field, more particularly to a kind of to have in aluminum alloy surface preparation
The method of corrosion-resistant function self-assembled composite film.
Background technology
Aluminium and aluminium alloy are due to intensity is high, density is small, electrical and thermal conductivity is strong, excellent in mechanical performance, machinability are good
The advantages that and be widely used in chemical industry, aerospace industry, auto manufacturing, food industry, electronics, instrument and meter industry with
And the fields such as marine ship industry.But in actual application, aluminium alloy takes on relatively low case hardness, wearability and resistance to
The problems such as corrosion difference, which greatly limits the application ranges of aluminium alloy.Al alloy component and Heat Treatment on Al
The raising of alloy property is no doubt very big, but also requires aluminum alloy surface to have the properties such as wear-resisting, corrosion-resistant in many occasions,
And the failure of most of aluminum alloy materials is mostly since surface, thus the surface property for improving material seems particularly heavy
It wants.There is certain orientation, compact arranged two dimension by chemistry key connection in matrix surface formation by self-assembling technique at present
Orderly molecular film.This method is simple to operate, and without complicated valuable instrument, and obtained self-assembled film is with stronger
Stability and high corrosion-resistant.
Invention content
The object of the present invention is to provide a kind of the side with corrosion-resistant function self-assembled composite film is prepared in aluminum alloy surface
Method.
The specific steps are：
（1）Aluminium alloy first removes surface alclad layer with the NaOH solution of a concentration of 30 ~ 60 g/L；600#, 1000# are then used successively
Be polishing to 1200# sand paper it is smooth, with analysis 5 ~ 15 min of straight alcohol ultrasonic cleaning, then vibration of ultrasonic wave in deionized water
5 ~ 30 min are cleaned, is dried for standby at 80 ~ 120 DEG C, obtains processed aluminium alloy.
（2）Prepare the solution that total volume is 23 ~ 100 mL：Wherein include 20 ~ 65 mL absolute ethyl alcohols, 1 ~ 5 mL is bis-（γ-
Triethoxy silicon substrate propyl）The potassium sulfide of tetrasulfide, 1 ~ 10 mL polyethylene glycol 200s, a concentration of 100 g/L of 1 ~ 20 mL is water-soluble
The pH value of solution is adjusted to 2 ~ 6 by liquid with acetic acid, and acquired solution stirs 1 ~ 5 h in 20 ~ 50 DEG C of magnetic stirring apparatus, is then added
The reduced graphene of 1 ~ 80 mg（rGO）, 20 ~ 120 min of ultrasonic wave decentralized processing, obtained mixed solution.
（3）By step（1）Obtained processed aluminium alloy immerses step（2）30 ~ 120 are impregnated in mixed solution obtained
It is taken out after min, is put into ultrasonic cleaning in deionized water and is finally existed with removing the unreacted small molecule of aluminum alloy surface and solvent
Cure 1 ~ 3 h in 80 ~ 120 DEG C of vacuum drying chamber, that is, realizing to prepare in aluminum alloy surface has corrosion-resistant function self assembly multiple
Close film.
The method of the present invention is at low cost, and preparation process is simple, and prepared self-assembled film has high impedance, low corrosion electric current close
Degree, binding force is good on alloy matrix aluminum, can improve aluminium alloy surface anti-corrosion erosion ability well, and do not make to environment and equipment
At pollution.
Description of the drawings
Fig. 1 is the SEM with corrosion-resistant function self-assembled composite film made from aluminum alloy surface in the embodiment of the present invention
Figure.
Fig. 2 is to have corrosion-resistant function self-assembled composite film and aluminium in the embodiment of the present invention made from aluminum alloy surface
The polarization curve of alloy substrate.
Specific implementation mode
Embodiment：
The pre-treatment of aluminium alloy：Experiment first removes surface alclad with 6061 aluminium alloy test pieces with the NaOH solution of a concentration of 45 g/L
Layer；Then be polishing to successively with 600#, 1000# and 1200# sand paper it is smooth, with analysis 10 min of straight alcohol ultrasonic cleaning, then
Vibration of ultrasonic wave cleans 10 min in deionized water, is dried for standby at 100 DEG C, obtains processed aluminium alloy.
Prepare the solution that total volume is 50 mL：Wherein include 37.5 mL absolute ethyl alcohols, 2.5 mL are bis-（γ-triethoxy
Silicon substrate propyl）Tetrasulfide, 5 mL polyethylene glycol 200s, 5 mL（100g/L) potassium sulfide aqueous solution, with acetic acid by the pH value of solution
4.0 are adjusted to, acquired solution stirs 1 h in 35 DEG C of magnetic stirring apparatus, and the reduced graphene of 40 mg is then added（rGO）, surpass
Mixed solution is made in 60 min of sound wave decentralized processing.
Processed aluminium alloy is placed in reaction 1h in mixed solution obtained to take out, it is clear to be put into ultrasonic wave in deionized water
It washes to remove the unreacted small molecule of aluminum alloy surface and solvent, finally cures 1 h in 100 DEG C of vacuum drying chamber, i.e., in fact
Prepared by present aluminum alloy surface have corrosion-resistant function self-assembled composite film.
Pass through sem test figure（Fig. 1）It can be seen clearly that manufactured in the present embodiment with corrosion-resistant function self assembly
Microstructure of the composite membrane in metal surface.
Polarization curve is one of common electrochemical means in corrosion science, is the coverings such as research film layer, coating, conversion film
The effective tool of metal electrode corrosion rate.To manufactured in the present embodiment there is corrosion-resistant function self-assembled composite film to carry out electrification
Corrosion resisting property test is learned, using three-electrode system, 3.5% NaCl is corrosive medium, carries out Tafel curve to it and scans to obtain
As a result such as Fig. 2.
It is obtained from test chart 2, the corrosion electric current density manufactured in the present embodiment with corrosion-resistant function self-assembled composite film
It is 1.676 × 10-6 A·cm-2Than the 3.783 × 10 of blank aluminum alloy surface-5 A/cm-2Reduce 1 order of magnitude, composite membrane
Corrosion potential shuffled about 0.5V, illustrate to show preferable corrosion resisting property.
Claims (1)
1. a kind of preparing the method with corrosion-resistant function self-assembled composite film in aluminum alloy surface, it is characterised in that specific steps
For：
（1）Aluminium alloy first removes surface alclad layer with the NaOH solution of a concentration of 30 ~ 60 g/L；600#, 1000# are then used successively
Be polishing to 1200# sand paper it is smooth, with analysis 5 ~ 15 min of straight alcohol ultrasonic cleaning, then vibration of ultrasonic wave in deionized water
5 ~ 30 min are cleaned, is dried for standby at 80 ~ 120 DEG C, obtains processed aluminium alloy；
（2）Prepare the solution that total volume is 23 ~ 100 mL：Wherein include 20 ~ 65 mL absolute ethyl alcohols, 1 ~ 5 mL is bis-（γ-three second
Oxygroup silicon substrate propyl）Tetrasulfide, 1 ~ 10 mL polyethylene glycol 200s, the potassium sulfide aqueous solution of a concentration of 100 g/L of 1 ~ 20 mL,
The pH value of solution is adjusted to 2 ~ 6 with acetic acid, acquired solution stirs 1 ~ 5 h in 20 ~ 50 DEG C of magnetic stirring apparatus, then be added 1 ~
The reduced graphene of 80 mg（rGO）, 20 ~ 120 min of ultrasonic wave decentralized processing, obtained mixed solution；
（3）By step（1）Obtained processed aluminium alloy immerses step（2）30 ~ 120 min are impregnated in mixed solution obtained
After take out, be put into deionized water ultrasonic cleaning to remove the unreacted small molecule of aluminum alloy surface and solvent, finally 80 ~
Cure 1 ~ 3 h in 120 DEG C of vacuum drying chamber, that is, realizing to prepare in aluminum alloy surface has corrosion-resistant function self assembly compound
Film.
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| CN201810152791.8A CN108468041A (en) | 2018-02-19 | 2018-02-19 | The method with corrosion-resistant function self-assembled composite film is prepared in aluminum alloy surface |
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| CN201810152791.8A CN108468041A (en) | 2018-02-19 | 2018-02-19 | The method with corrosion-resistant function self-assembled composite film is prepared in aluminum alloy surface |
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Citations (7)
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| CN103046041A (en) * | 2013-01-27 | 2013-04-17 | 桂林理工大学 | Preparation method of nanoparticle-doped self-assembled film with corrosion resisting function on surface of aluminium alloy |
| CN103374718A (en) * | 2012-04-19 | 2013-10-30 | 株式会社日立制作所 | Corrosion-proof aluminum material and method for producing the same |
| CN103628050A (en) * | 2013-11-04 | 2014-03-12 | 江苏大学 | Method for preparing composite graphene/silane film on surface of metal |
| CN103966646A (en) * | 2014-04-16 | 2014-08-06 | 湖北大学 | Electro-deposition preparation method and application of reduced and oxidized graphene/silane composite film |
| CN104629603A (en) * | 2015-02-11 | 2015-05-20 | 上海理工大学 | Graphene-containing metal surface treatment agent and preparation method of anti-corrosion coating |
| CN104630749A (en) * | 2015-02-22 | 2015-05-20 | 桂林理工大学 | Corrosion-resistant self-assembled doped film layer on aluminum alloy surface and preparation method of corrosion-resistant self-assembled doped film layer |
| CN106085218A (en) * | 2016-08-17 | 2016-11-09 | 安徽红桥金属制造有限公司 | A kind of high-efficiency environment friendly compound closure agent |
-
2018
- 2018-02-19 CN CN201810152791.8A patent/CN108468041A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103374718A (en) * | 2012-04-19 | 2013-10-30 | 株式会社日立制作所 | Corrosion-proof aluminum material and method for producing the same |
| CN103046041A (en) * | 2013-01-27 | 2013-04-17 | 桂林理工大学 | Preparation method of nanoparticle-doped self-assembled film with corrosion resisting function on surface of aluminium alloy |
| CN103628050A (en) * | 2013-11-04 | 2014-03-12 | 江苏大学 | Method for preparing composite graphene/silane film on surface of metal |
| CN103966646A (en) * | 2014-04-16 | 2014-08-06 | 湖北大学 | Electro-deposition preparation method and application of reduced and oxidized graphene/silane composite film |
| CN104629603A (en) * | 2015-02-11 | 2015-05-20 | 上海理工大学 | Graphene-containing metal surface treatment agent and preparation method of anti-corrosion coating |
| CN104630749A (en) * | 2015-02-22 | 2015-05-20 | 桂林理工大学 | Corrosion-resistant self-assembled doped film layer on aluminum alloy surface and preparation method of corrosion-resistant self-assembled doped film layer |
| CN106085218A (en) * | 2016-08-17 | 2016-11-09 | 安徽红桥金属制造有限公司 | A kind of high-efficiency environment friendly compound closure agent |
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