CN108796583A - A kind of preparation method of the super-hydrophobic passivating film of Pure Iron Surface corrosion resistance - Google Patents
A kind of preparation method of the super-hydrophobic passivating film of Pure Iron Surface corrosion resistance Download PDFInfo
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- CN108796583A CN108796583A CN201810675942.8A CN201810675942A CN108796583A CN 108796583 A CN108796583 A CN 108796583A CN 201810675942 A CN201810675942 A CN 201810675942A CN 108796583 A CN108796583 A CN 108796583A
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- super
- electrolyte
- passivating film
- pure iron
- hydrophobic
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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
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/34—Anodisation of metals or alloys not provided for in groups C25D11/04 - C25D11/32
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2518/00—Other type of polymers
- B05D2518/10—Silicon-containing polymers
Abstract
The invention belongs to super-hydrophobic film layer preparing technical fields, a kind of preparation method of the super-hydrophobic passivating film of Pure Iron Surface corrosion resistance is provided, the method that this method passes through electrochemical corrosion, using specific electrolyte, the passivating film of a floor height impedance is generated in iron surface, super-hydrophobicity is showed after silicon fluoride is modified, wherein machined parameters are：Initial current density is 0.1~20A/cm2, 2~50m/s of electrolyte flow rate；Process time 5s~1000s.Electrolyte used in preparation process of the present invention is at low cost; environmentally friendly and preparation process is simple; the passivating film prepared has higher super-hydrophobicity under silicon fluoride modification; contact angle can reach 160 °; roll angle is up to 2.1 °; the passivating film can make the corrosion potential of workpiece surface shuffle about 0.19V simultaneously, play a very good protection to pure iron matrix.
Description
Technical field
The invention belongs to super-hydrophobic film layer preparing technical fields, are related to one kind and being used to prepare the super-hydrophobic passivating film of corrosion resistance
The formula of electrolyte and its preparation method of the super-hydrophobic film.
Background technology
Ingot iron has many advantages, such as that saturation induction density is high, coercivity is low, magnetic conductivity is high, cold and hot working performance is good,
It is used widely in the industry such as electric appliance, telecommunication, electronics, aviation.However pure iron is due to its active chemical property, in humidity
And be easily corroded in water environment, to restrict its application foreground.
With the development of technology, for iron material and ferrous alloy, researcher proposes a variety of microstructure structures
Method.Such as document Fan Y, He Y, Luo P, et al.A facile electrodeposition process to
fabricate corrosion-resistant superhydrophobic surface on carbon steel[J]
.Applied Surface Science,2016,368:435-442. with number of patent application be 201610946822.8 and
201710192543.1 deposit microstructure layer using electrochemistry, chemical deposition on ferrous alloy surface respectively, but a large amount of
The use of chemical reagent not only increases cost, while causing pollution to environment again.Number of patent application 201610017219.1
The structure sheaf of asperity is provided in workpiece surface corrosion by chemical dissolution method, however spray time is too long, and need
Peripheral equipment is needed to do protective treatment.Number of patent application be 201510012667.8 by way of electrochemical dissolution in table
Face, which is corroded, micro-nano dual asperity structure, and by having superhydrophobic property after surface modification, but this method is tried using chemistry
Agent is not only various, and to staff, there are security risks for the use of strong acid and strong base, also unfriendly to environment.Therefore, one is developed
Kind is simple, method efficiently, safe prepares corrosion resistance super hydrophobic surface on Pure Iron Surface is particularly important.
Invention content
For the deficiencies in the prior art, the present invention provides a kind of side for preparing super-hydrophobic film layer simple to operation
Method, the super-hydrophobic film layer being prepared have higher corrosion resistance.
In order to achieve the above object, the technical solution adopted by the present invention is：
A kind of preparation method of the super-hydrophobic passivating film of Pure Iron Surface corrosion resistance, this method are based on anode oxidation film-forming skill
Art, using specific electrolyte, generates the passivating film of a floor height impedance, by fluorine by the method for electrochemical corrosion in iron surface
Super-hydrophobicity is showed after hydride modified.Specifically include following steps：
(1) electrolyte is configured
At room temperature, sodium molybdate, sodium chloride are added in deionized water, magnetic agitation 5~10min latter two electrolyte is abundant
Dissolving is uniformly mixed, and obtains electrolyte.Sodium molybdate, the 0.1~5g of 0.5~10g are added in every 1000ml deionized waters
Sodium chloride.
(2) it regard ingot iron (DT4E) as basis material, uses alcohol, distilled water ultrasonic cleaning drying spare respectively.
(3) pure iron connect with pulse power anode and does anode, and cathode plate face needs to prepare super-hydrophobic antisepsis erosion film layer
Surface is processed, and so that the cation that Pure Iron Surface dissolves is reacted generation high impedance film with the molybdate in electrolyte and is attached to work
On part surface.The technological parameter of processing is：Initial current density is 0.1~20A/cm2, duty ratio 10~100%, frequency 1~
50kHz, electrolyte flow rate：2~50m/s；Process time：5s~1000s.
(4) film layer after processing step (3) is dried up after being rinsed using deionized water, and is placed fully de- in dry environment
Water.
(5) the fully dewatered workpiece of step (4) is immersed in the silicon fluoride ethanol solution that mass fraction is 1% to modify and is dropped
Low-surface-energy is finally dried, and Pure Iron Surface obtains the super-hydrophobic passivating film of corrosion resistance.
Compared with prior art, useful achievement of the invention is as follows：
(1) while having superhydrophobic property, with the increase of thicknesses of layers, the corrosion potential on surface is gradually shuffled,
Show that its corrosion resistance is gradually improved.
(2) electrolyte used in is at low cost, environmentally friendly, and preparation process is simple；The passivating film prepared exists
Silicon fluoride modification is lower, and there is super-hydrophobicity, contact angle can reach 160 °, and roll angle is up to 2.1 °, while after obtaining anodic passivity film
Phase just has corrosion resistance without extra process, which can make the corrosion potential of workpiece surface shuffle about 0.19V, to pure
Iron-based body plays a very good protection.
Description of the drawings
Fig. 1 is the contact angle of super hydrophobic surface obtained by present example.
Specific implementation mode
Below in conjunction with specific embodiment, the present invention will be further described.
Using alcohol distillation water be cleaned by ultrasonic pure iron matrix and dry up it is spare, with beaker measure 1000ml deionized waters,
Enter in electrolytic cell, weigh sodium molybdate 5g, sodium chloride 1g successively, under using magnetic stirrer constantly stirring, is added step-wise to
It is sufficiently stirred in deionized water 5 minutes, so that solute is fully dissolved mixing, obtain electrolyte.
Pure iron is connect with positive pole does anode, and copper coin faces Pure Iron Surface to be processed as cathode, and initial current is close
Degree is 1.1A/cm2, duty ratio 50%, frequency 10kHz, electrolyte flow rate 12.5m/s, process time 60s.
Mass fraction is immersed in reduce surface in 1% silicon fluoride ethanol solution after pure iron is fully dried up dehydration
Can, finally dry.After using the modification of 1% silicon fluoride ethanol solution, super-hydrophobicity is presented in surface.
The anodic passivity film contact angle that the present invention is prepared is about 161 °, and roll angle is about 2.1 °, and current potential is relative to original
The current potential on beginning surface shuffles about 0.19V.
Embodiments of the present invention above described embodiment only expresses, but therefore can not be interpreted as special to the present invention
The limitation of the range of profit, it is noted that for those skilled in the art, without departing from the inventive concept of the premise,
Various modifications and improvements can be made, these are all belonged to the scope of protection of the present invention.
Claims (2)
1. a kind of preparation method of the super-hydrophobic passivating film of Pure Iron Surface corrosion resistance, which is characterized in that pass through electrochemical corrosion
Method is generated the passivating film of a floor height impedance in iron surface, is showed after silicon fluoride is modified super-hydrophobic using specific electrolyte
Property；Preparation method specifically includes following steps：
(1) electrolyte is configured
At room temperature, sodium molybdate, sodium chloride are added in deionized water, magnetic agitation latter two electrolyte is fully dissolved, mixed
It is even, obtain electrolyte；The sodium molybdate of 0.5~10g, the sodium chloride of 0.1~5g are added in every 1000ml deionized waters；
(2) it using ingot iron as basis material, is dried up after ultrasonic cleaning spare；
(3) pure iron connect with pulse power anode and does anode, and cathode plate face needs to prepare the surface of super-hydrophobic antisepsis erosion film layer
It is processed, so that the cation that Pure Iron Surface dissolves is reacted generation high impedance film with the molybdate in electrolyte and be attached to workpiece table
On face；The technological parameter of processing is：Initial current density is 0.1~20A/cm2, duty ratio 10~100%, frequency 1~
50kHz, electrolyte flow rate：2~50m/s；Process time：5s~1000s；
(4) film layer after processing step (3) is dried up after being rinsed using deionized water, and is placed in dry environment and be fully dehydrated；
(5) the fully dewatered workpiece of step (4) is immersed modification in silicon fluoride ethanol solution reduces surface energy, pure iron after drying
Surface obtains the super-hydrophobic passivating film of corrosion resistance.
2. a kind of preparation method of super-hydrophobic passivating film of Pure Iron Surface corrosion resistance according to claim 1, feature exist
In the mass fraction of silicon fluoride ethanol solution is 1% in the step (4).
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| CN201810675942.8A CN108796583B (en) | 2018-06-27 | 2018-06-27 | A kind of preparation method of the super-hydrophobic passivating film of Pure Iron Surface corrosion resistance |
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| CN201810675942.8A CN108796583B (en) | 2018-06-27 | 2018-06-27 | A kind of preparation method of the super-hydrophobic passivating film of Pure Iron Surface corrosion resistance |
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| CN108796583B CN108796583B (en) | 2019-10-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114717619A (en) * | 2022-04-07 | 2022-07-08 | 中国科学院青海盐湖研究所 | Method for preparing super-hydrophobic membrane layer by utilizing nickel-iron alloy through one-step electrolytic deposition |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101020810A (en) * | 2007-02-14 | 2007-08-22 | 天津大学 | Water-base grinding fluid for on-line electrolytic grinding |
| CN104846376A (en) * | 2015-05-29 | 2015-08-19 | 清华大学 | Preparation method of metal-based super-hydrophobic surface |
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2018
- 2018-06-27 CN CN201810675942.8A patent/CN108796583B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101020810A (en) * | 2007-02-14 | 2007-08-22 | 天津大学 | Water-base grinding fluid for on-line electrolytic grinding |
| CN104846376A (en) * | 2015-05-29 | 2015-08-19 | 清华大学 | Preparation method of metal-based super-hydrophobic surface |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114717619A (en) * | 2022-04-07 | 2022-07-08 | 中国科学院青海盐湖研究所 | Method for preparing super-hydrophobic membrane layer by utilizing nickel-iron alloy through one-step electrolytic deposition |
| CN114717619B (en) * | 2022-04-07 | 2024-04-02 | 中国科学院青海盐湖研究所 | Method for preparing super-hydrophobic film by utilizing nickel-iron alloy one-step electrolytic deposition |
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