CN104911328B - A kind of method that utilization ultra-short pulse laser prepares the super-hydrophobic corrosion-resistant surface of cast iron - Google Patents
A kind of method that utilization ultra-short pulse laser prepares the super-hydrophobic corrosion-resistant surface of cast iron Download PDFInfo
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Abstract
The present invention relates to a kind of method that utilization ultra-short pulse laser prepares the super-hydrophobic corrosion-resistant surface of cast iron, belong to metallic substrate surface technical field of modification.Cast iron sample is polished pretreatment by this method first, then it is utilized respectively after deionized water and washes of absolute alcohol sample surfaces and dries up or dry, recycle laser processing technology, sample is surface-treated after regulating the technological parameter of correlation using ultra-short pulse laser, countless micro-structurals are processed in sample surfaces, after machining, sample after processing is put into electrically heated drying cabinet and toasted, the super-hydrophobic corrosion-resistant surface of the cast iron is obtained, the surface possesses self-cleaning function and excellent rub resistance and decay resistance.The preparation method technique of the present invention is simple, and easy to operate, efficiency high, less energy consumption, cost is low, environmental protection, it is easy to accomplish commercial Application.
Description
Technical field：
The invention belongs to metal surface properties modification technology, it is related to the preparation method of super hydrophobic surface on cast iron matrix, more
Specifically, the present invention relates to a kind of method that utilization ultra-short pulse laser prepares the super-hydrophobic corrosion-resistant surface of cast iron.
Background technology：
Nature to we provide substantial amounts of super-hydrophobic, self-cleaning animals and plants surface example, such as lotus leaf, Rice Leaf,
The surfaces such as watermark leg, the wing of moth, the feather of birds.The biology of nature evolves various forms, work(by hundreds of millions differentiation
Energy, the surface of structure and material, to adapt to the environment of its existence.This body structure surface has super-hydrophobic non-infiltration, automatically cleaning, prevented
The function of adhesion, the in addition function such as also stealthy, drag reduction, noise reduction.With modern material technology and test detection technique
Development, scientists find that these animals and plants of nature have super-hydrophobic and self-cleaning function, when pollutant and water loading exist
Landing is easy on its surface and reaches self-cleaning purpose, and to clean same surface then needs to expend substantial amounts of manpower and thing
Power.Therefore prepare super hydrophobic surface on the metal material to get growing concern for, people thirst for should by ultra-hydrophobicity
For industrial production, super-hydrophobic performance is especially prepared in Cast Iron Surface.Generally regulation, by water droplet surface contact
Angle CA is more than 90 ° and is referred to as hydrophobic surfaces, when contact angle CA is more than 150 °, roll angle TA is less than 10 ° of surface and is referred to as super-hydrophobic table
Face.
Cast iron is yield highest metal material in the world, is widely used in shipping industry, auto industry, bridge iron
In the fields such as road.But it is annual because corrosion causes the loss of cast iron to account for the 10-20% of annual production, therefore cast iron anticorrosion just
It is particularly important.Super-hydrophobic corrosion-resistant concept provides new thinking for the corrosion-resistance treatment of cast iron matrix.Use laser technology
Processing cast iron surface, makes Cast Iron Surface form corrosion resistant super hydrophobic surface, with very big application prospect.
The wellability of metal material is a critically important feature of metal surface, the microstructure and constituent of material
The wellability of this material surface of joint effect.Preparing super-hydrophobic method on the metal material has a lot, and typical method has：
Anodizing, chemical medicinal liquid etch, electrochemical etching+chemical corrosion method, laser ablation+chemical corrosion method.Anodic oxidation
Method is exactly to immerse porous oxidation alumina gel among boiling water, is then mixed the material of distillation and aluminium stone or silica, in order to have
Effect ground obtains super hydrophobic surface, in addition it is also necessary to necessary modification is carried out to surface with low-surface energy substance, the efficiency of processing is not high.
And other preparation methods need special equipment or harsh processing conditions and indispensable costliness, the chemistry of high pollution mostly
Medicament, by the way that sample bubble is put in chemical reagent, makes its surface form pit shape micro-structural.Pollution of these methods to environment
Larger, operating procedure is complicated.For preparing super hydrophobic surface on cast iron materials, one kind will be used without chemical medicinal liquid, without dirt
Dye laser processing method simple to operate, improves Cast Iron Surface pattern in the highly consistent micro-structural of material surface form, realizes
The requirement of material surface super-hydrophobic automatic cleaning, it is all significant for improving efficiency, energy-conservation, environmental protection etc..Application number
A kind of preparation method of aluminium alloy bionic super-hydrophobic surface is disclosed for 201310079939.7 patent, first with absolute ethyl alcohol
Cleaning aluminum alloy, is then laser machined in aluminum alloy surface, and the cratering knot of countless minute yardsticks is processed in specimen surface
Structure, then sample is immersed in chemical etching solution, the shape characteristic of specimen surface is changed, but this method does not break through completely
The process of surface treatment of traditional chemical etching, using also further make use of chemical etching after laser processing technology, and will pass through
Aluminum alloy specimen after chemical etching is put into the toluene solution containing DTS and modified, and low surface is gradually formed on its surface
The film of energy, the complex treatment process, and high poison carcinogen toluene has been used, easily cause environmental pollution.Application No.
201410657627.4 patent discloses a kind of ultra-hydrophobic high sticking metal surface and preparation method thereof, passes through high power psec
Or femtosecond laser prepares the periodicity micro nano structure of class rose surface microstructure in metal surface, then pass through low free energy
The surface modification of material, realizes the preparation of ultra-hydrophobic high sticking metal surface, this method is using low-surface energy substance to surface
Necessary modification is carried out, processing efficiency is low；The patent of Application No. 200910183588.8 discloses a kind of super profit of bionic metal
Wet trans-scale structure design method and preparation method, this method are put pending sample by complicated super hydrophilic Theoretical Design
In high vacuum chamber, twice sweep is carried out under different angles respectively, it is final obtain access expansion biological surface pattern across chi
Micro-structural is spent, but this method need to strictly control various process parameters, processing cost is too high, is completely unsuitable for industrialization extensive
Production.
In summary, explore a kind of with super-hydrophobic corrosion resistant cast iron simple, that quick, cost is low, high in machining efficiency
Matrix surface preparation method, is the technical work that an existing theory value has application value realistic again, this technological invention is very
To being possible to bring subversive change to this super-hydrophobic corrosion-resistant field.
The content of the invention
It is simple it is an object of the invention to provide a kind of technique in order to overcome the shortcomings of that prior art is present, preparation efficiency
High, the cast iron method for preparing super-hydrophobic surface of environmental protection.The method of the present invention can be in various sizes and cast iron of different shapes
Material surface obtain steady in a long-term, contact angle be more than 150 °, roll angle be less than 10 ° of super hydrophobic surface, while obtained table
Face also has outstanding decay resistance.
The purpose of the present invention is achieved through the following technical solutions：One kind of the present invention utilizes ultra-short pulse laser
The method for preparing the super-hydrophobic corrosion-resistant surface of cast iron, methods described comprises the following steps：
Step one, pending Cast Iron Surface is polished pretreatment, obtains the cast iron sample after the polishing of surface；
Step 2, the cast iron sample after surface polishing described in step one is placed on the ultrasonic washing instrument for filling deionized water
Middle cleaning, then with washes of absolute alcohol, after cleaning up, the cast iron sample surfaces is dried up with cold wind or room temperature is dried in the air naturally
It is dry, obtain the cast iron sample of cleaning；
Step 3, using laser processing technology, is regulated after the technological parameter of correlation to step using ultrashort pulse laser
The clean cast iron sample surfaces obtained described in rapid two carry out laser scanning processing, and countless micro-structurals are processed in sample surfaces；
The laser scanning carries out light beam scanning using galvanometer system, and the speed of vibration mirror scanning is 0.1mm/s-30m/s, is swashed
The break-make of light and the scanning range of galvanometer system, scanning track and process velocity are by computer program control and setting；
Or the laser scanning is realized using motion platform system, and light beam is fixed, the motion of sample relative beam, platform fortune
Dynamic speed is 0.1mm/s-3m/s, and break-make, platform movement locus and the speed of laser are by computer program control and setting；
Step 4, constant temperature and humidity is put into by cast iron sample of the surface obtained described in step 3 after Laser Processing is handled
Toasted in electrically heated drying cabinet, that is, obtain the super-hydrophobic corrosion-resistant surface of the cast iron；
Wherein, the pulse laser wavelength described in step 3 is less than 1550nm, and mean power is less than 80W, and the laser adds
Work parameter is：Pulsewidth is more than 10ps, and single pulse energy is less than 0.08mJ.
Further, the repetition rate of ultrashort pulse laser described in step 3 is 200kHz- in above-mentioned technical proposal
1MHz, the pulsewidth is 10ps-10ns.
It is further preferred that the wavelength of the ultrashort pulse laser is 1064nm, the arteries and veins of the ultrashort pulse laser
A width of 80ps-10ns.
It is further preferred that the pulsewidth of the ultrashort pulse laser is 80ps, the single pulse energy is 7.5 μ
J-8.5 μ J, the laser scanning speed is 200mm/s-400mm/s.
It is further preferred that the pulsewidth of the ultrashort pulse laser is 10ns, the single pulse energy is
0.06mJ-0.07mJ, the laser scanning speed is 500mm/s-1000mm/s.
It is further preferred that the repetition rate of the ultrashort pulse laser is 200kHz.
It is further preferred that the repetition rate of the ultrashort pulse laser is 800kHz-900kHz, the laser is swept
Speed is retouched for 800mm/s-900mm/s.
Further, the polishing pretreatment in above-mentioned technical proposal described in step one uses power to turn for 370W, abrasive disk
The pre-grinding test sample of gold phase machine that speed is 450 revs/min, lap diameter is 230mm, polishing preprocessing process needs auxiliary a diameter of
200mm, the SiC waterproof abrasive papers of 1000 mesh are processed by shot blasting that polishing scope is 100cm in the Cast Iron Surface2, polishing time 10
Minute.
Further, in above-mentioned technical proposal described in step 2 be cleaned by ultrasonic instrument supersonic frequency be 40kHz, it is described go from
Sub- water resistance rate is 18.25 megaohms, and the deionized water should flood cast iron sample surfaces, at room temperature 30 points of continuous wash
Clock.
Further, the pressure described in above-mentioned technical proposal step 4 in electrically heated drying cabinet is normal atmospheric pressure, humidity
For 40%-60%RH, temperature is 100 DEG C -250 DEG C, and the time of the sample baking is in 2-8 hours, the electrically heated drying cabinet
Temperature error be ± 1 DEG C.
It is further preferred that the humidity in the constant temperature and humidity electrically heated drying cabinet is 50%RH, temperature is 100 DEG C, is dried
The roasting time is 8 hours.
Present invention also offers the super-hydrophobic corrosion-resistant surface of the cast iron prepared by the above method, the surface has micro-
The strip of meter level, poroid or convex structure.
Compared with prior art, the inventive method has advantages below：
(1) the Cast Iron Surface Maximum Contact angle prepared using the inventive method is up to 159.7 °, and minimum roll angle is
4.4 °, therefore with extraordinary ultra-hydrophobicity.
(2) preparation method technique of the invention is simple, and easy to operate, efficiency high, less energy consumption, cost is low, overcomes completely
Tradition etches Cast Iron Surface using chemical reagent or still needed to after the completion of Laser Processing again further using low-surface energy substance
The defect of modification of surfaces, environmental protection does not use any chemical reagent coating, and the technological parameter of the inventive method is easily controlled
System, it is easy to accomplish commercial Application.
(3) the super-hydrophobic iron metal surface property stabilization prepared using the inventive method, possesses excellent corrosion resistant
Erosion energy performance, considerably increases the service life of cast iron.
Brief description of the drawings
Fig. 1 (a), (b) are respectively that the contact angle for the super-hydrophobic corrosion-resistant surface of cast iron that the embodiment of the present invention 1 is prepared shows
Intention, roll angle schematic diagram；
Fig. 2 (c), (d) are respectively that the contact angle for the super-hydrophobic corrosion-resistant surface of cast iron that the embodiment of the present invention 2 is prepared shows
Intention, roll angle schematic diagram；
Fig. 3 (e), (f) are respectively that the contact angle for the super-hydrophobic corrosion-resistant surface of cast iron that the embodiment of the present invention 3 is prepared shows
Intention, roll angle schematic diagram；
Fig. 4 (g), (h) are respectively that the contact angle for the super-hydrophobic corrosion-resistant surface of cast iron that the embodiment of the present invention 4 is prepared shows
Intention, roll angle schematic diagram；
Fig. 5 is the cross-sectional profiles figure for the super-hydrophobic corrosion-resistant surface of cast iron that the embodiment of the present invention 1 is prepared；
Fig. 6 is the cross-sectional profiles figure for the super-hydrophobic corrosion-resistant surface of cast iron that the embodiment of the present invention 2 is prepared；
Fig. 7 is the cross-sectional profiles figure for the super-hydrophobic corrosion-resistant surface of cast iron that the embodiment of the present invention 3 is prepared；
Fig. 8 is the cross-sectional profiles figure for the super-hydrophobic corrosion-resistant surface of cast iron that the embodiment of the present invention 4 is prepared.
Embodiment
In order to be better understood from the present invention, technical scheme is done further in detail below in conjunction with specific embodiment
Introduce.
Experimental method used in following embodiments is conventional method unless otherwise specified.
The method that a kind of utilization ultra-short pulse laser of the present invention prepares the super-hydrophobic corrosion-resistant surface of cast iron, with reference to certainly
Right boundary's biomaterial is as design basis, the structure that natural imitation circle Biocomposite material fine structure is distributed in Cast Iron Surface
Feature, design surface structure.
Embodiment 1
The method that a kind of utilization ultra-short pulse laser of the present embodiment prepares the super-hydrophobic corrosion-resistant surface of cast iron, including it is following
Specific steps：
Step one, cast iron is polished, is 370W from power, lap speed is 450 revs/min, and lap diameter is
230mm pre-grinding test sample of gold phase machine, polishing process needs the SiC waterproof abrasive papers for aiding in a diameter of 200mm, 1000 mesh in the cast iron
Surface is processed by shot blasting that polishing scope is 100cm2, polishing time 10 minutes, obtain surface polishing after cast iron sample；
Step 2, the cast iron sample after surface polishing described in step one is cleaned with ultrasonic washing instrument, ultrasonic wave cleaning
Instrument ultrasonic frequency is 40kHz, and sample surfaces are flooded for 18.25 megaohms of deionized water with resistivity, at room temperature, continuous clear
Wash 30 minutes, then using washes of absolute alcohol, room temperature is dried naturally, obtain the cast iron sample of cleaning；
Step 3, using ultrashort pulse laser, laser wavelength is 1064nm, and the cleaning obtained described in step 2 is cast
Iron sample surface carries out laser scanning manufacturing, and countless micro-structurals are processed in sample surfaces；The laser pulsewidth is 80ps,
Single pulse energy be 8.5 μ J, repetition rate is 200kHz, the laser scanning utilize X-Y scanning galvanometer systems, make laser beam with
Cast iron sample surfaces described in the ablation line by line of 325mm/s speed；The galvanometer system is driven by X-Y optical scanning heads, electronics
Dynamic amplifier, optical reflecting lens and field lens composition, the scanning range and speed of the galvanometer system, line are scanned and Surface scan road
Footpath is controlled and set by computer, the signal that the computer is provided by drive amplification circuit drives optical scanning head, from
And control the deflection of laser beam in X-Y plane, sample moves in the x-direction relative to laser beam, by control translational speed and
Laser pulse repetition frequency, makes its pulse matching degree reach 1%-99%, completes after movement, then single step stepping in the y-direction, passes through
Step distance is controlled, its light beam registration is reached 1%-99%, workbench reversion in y directions, the sample range of work is
126mm x 126mm；
Sample after processing is put into electrically heated drying cabinet and dried after step 3 is laser machined by step 4, sample
It is roasting, depressed in air pressure for normal atmospheric, humidity is 40%RH, temperature is toasted 8 hours for constant temperature under the conditions of 100 DEG C, obtain described
The super-hydrophobic corrosion-resistant surface of cast iron.
Use resistivity for 18.25 megaohms of deionized water, tested using optical contact angle surface interfacial tension measuring instrument
The contact angle of the obtained cast iron super-hydrophobicity corrosion-resistant surface, roll angle, when carrying out contact angle, rolling angular measurement, are adopted
Measured with the method that accesses, the suspension drop of volume needed for being formed under liquid feeding syringe needle, the Z axis of regulation example platform makes on sample surfaces
Rise, when sample surfaces are contacted with the drop bottom hung under liquid feeding syringe needle, drop is just transferred to sample surfaces from liquid feeding syringe needle,
Then make sample surfaces drop to original position by adjusting sample stage Z axis again to measure, due to the cast iron prepared
Surface super hydrophobic performance is excellent, and 3-8 microlitres of water droplet can not adhere to, so drop volume is 9 microlitres, test temperature is 25.5
DEG C, humidity is 19.5%RH.
The super-hydrophobic corrosion-resistant surface of cast iron that the present embodiment is prepared, its microscopic appearance photo is as shown in figure 5, its surface
Micron-sized list structure is presented.
Shown in the super-hydrophobic corrosion-resistant surface of cast iron and contact angle schematic diagram such as Fig. 1 (a) of water that the present embodiment is prepared,
Shown in roll angle schematic diagram such as Fig. 1 (b).
The super-hydrophobic corrosion-resistant surface of cast iron and the contact angle of water that the present embodiment is prepared are 159.7 °, and roll angle is
5.6 °, test result is shown in Table 1.
Resistivity is used to prepare the NaCl aqueous solution that mass concentration is 5% for 18.25 megaohms of deionized water, then in room
Undressed plain cast iron is fully immersed in the above-mentioned NaCl aqueous solution 6 hours under temperature, cast iron is weighed respectively before corrosion
Quality afterwards, the weight lost using material in unit area in the unit interval calculates the rate of corrosion on the surface, and test is described
The decay resistance on surface, wherein：Room temperature is 25 DEG C, and the surface is needed with deionized water after corrosion in ultrasonic washing instrument
Clean up, after surveying its quality after moisture evaporating completely again.It is computed, the rate of corrosion of plain cast iron is 13.972 × 10-3mm/a。
The cast iron for being obtained whole surface after the processing of the present embodiment method using above-mentioned identical method of testing is complete
Complete immersion measures the super-hydrophobic corrosion-resistant surface of cast iron that the present embodiment is prepared 6 hours in the above-mentioned NaCl aqueous solution
Rate of corrosion is 1.933 × 10-3Mm/a, test result is shown in Table 1, and test result shows the Cast Iron Surface phase that the present embodiment is prepared
Than having excellent decay resistance in plain cast iron surface.
Embodiment 2
The method that a kind of utilization ultra-short pulse laser of the present embodiment prepares the super-hydrophobic corrosion-resistant surface of cast iron, including it is following
Specific steps：
Step one, cast iron is polished, is 370W from power, lap speed is 450 revs/min, and lap diameter is
230mm pre-grinding test sample of gold phase machine, polishing process needs the SiC waterproof abrasive papers for aiding in a diameter of 200mm, 1000 mesh in the cast iron
Surface is processed by shot blasting that polishing scope is 100cm2, polishing time 10 minutes, obtain surface polishing after cast iron sample；
Step 2, the cast iron sample after surface polishing described in step one is cleaned with ultrasonic washing instrument, ultrasonic wave cleaning
Instrument ultrasonic frequency is 40kHz, and sample surfaces are flooded for 18.25 megaohms of deionized water with resistivity, at room temperature, continuous clear
Wash 30 minutes, then using washes of absolute alcohol, after cleaning up, dried up with cold wind, obtain the cast iron sample of cleaning；
Step 3, using ultrashort pulse laser, laser wavelength is 1064nm, and the cleaning obtained described in step 2 is cast
Iron sample surface carries out laser scanning manufacturing, and countless micro-structurals are processed in sample surfaces, and the laser pulsewidth is 80ps,
Single pulse energy is 7.5 μ J, and repetition rate is 200kHz, the laser scanning routing motion workbench, by described in step 2
Obtained clean cast iron sample be fixed on motion workbench on, using lens by laser beam focusing on to the sample, make
Focusing of the surface of sample relative to the pulse laser light beam etches hot spot along x, y, z three-dimensional direction moving, and speed is
217mm/s, by cast iron sample surfaces described in ablation line by line, realizes the etching of micro-nano structure；The motion platform unit
For three-dimensional servo precision mobile platform, the scope of the platform movement, speed, direction, can be along X, Y, Z tri- by computer control
Direction movement is tieed up, the sample range of work is 150mm x 150mm；
Sample after processing is put into electrically heated drying cabinet and dried after step 3 is laser machined by step 4, sample
It is roasting, depressed in air pressure for normal atmospheric, humidity is 44%RH, temperature is toasted 4 hours for constant temperature under the conditions of 100 DEG C, obtain described
The super-hydrophobic corrosion-resistant surface of cast iron.
Using the contact of the identical method of testing of above-described embodiment 1 and the Cast Iron Surface obtained described in test condition test
Angle, roll angle.
The super-hydrophobic corrosion-resistant surface of cast iron that the present embodiment is prepared, its microscopic appearance photo is as shown in fig. 6, its surface
Micron-sized list structure is presented.
Shown in the super-hydrophobic corrosion-resistant surface of cast iron and contact angle schematic diagram such as Fig. 2 (c) of water that the present embodiment is prepared,
Shown in roll angle schematic diagram such as Fig. 2 (d).
The super-hydrophobic corrosion-resistant surface of cast iron and the contact angle of water that the present embodiment is prepared are 156.9 °, and roll angle is
8.9 °, test result is shown in Table 1.
Using the identical method of testing of above-described embodiment 1 and test condition by whole surface by the present embodiment method
The cast iron obtained after reason is fully immersed in the above-mentioned NaCl aqueous solution 6 hours, measures the cast iron that the present embodiment prepares super thin
The rate of corrosion of water corrosion-resistant surface is 1.967 × 10-3Mm/a, test result is shown in Table 1.Test result shows that the present embodiment is prepared into
To Cast Iron Surface there is excellent decay resistance compared to plain cast iron surface.
Embodiment 3
The method that a kind of utilization ultra-short pulse laser of the present embodiment prepares the super-hydrophobic corrosion-resistant surface of cast iron, including it is following
Specific steps：
Step one, cast iron is polished, is 370W from power, lap speed is 450 revs/min, and lap diameter is
230mm pre-grinding test sample of gold phase machine, polishing process needs the SiC waterproof abrasive papers for aiding in a diameter of 200mm, 1000 mesh in the cast iron
Surface is processed by shot blasting that polishing scope is 100cm2, polishing time 10 minutes, obtain surface polishing after cast iron sample；
Step 2, the cast iron sample after surface polishing described in step one is cleaned with ultrasonic washing instrument, ultrasonic wave cleaning
Instrument ultrasonic frequency is 40kHz, and sample surfaces are flooded for 18.25 megaohms of deionized water with resistivity, at room temperature, continuous clear
Wash 30 minutes, then using washes of absolute alcohol, after cleaning up, room temperature is dried naturally, obtain the cast iron sample of cleaning；
Step 3, using ultrashort pulse laser, laser wavelength is 1064nm, and the cleaning obtained described in step 2 is cast
Iron sample surface carries out laser scanning manufacturing, countless micro-structurals is processed in sample surfaces, the pulsewidth of the laser is
10ns, single pulse energy is 0.067mJ, and repetition rate is 900kHz, and the laser scanning utilizes X-Y scanning galvanometer systems, makes
Laser beam is with cast iron sample surfaces described in the ablation line by line of 900mm/s speed；The galvanometer system is by X-Y optical scanners
Head, electric drive amplifier, optical reflecting lens and field lens composition, the scanning range and speed of the galvanometer system, line scanning
It is controlled and sets by computer with Surface scan path, the signal that the computer is provided passes through drive amplification circuit drives optics
Probe, so as to control the deflection of laser beam in X-Y plane, sample is moved in the x-direction relative to laser beam, by controlling to move
Dynamic speed and laser pulse repetition frequency, make its pulse matching degree reach 1%-99%, complete after movement, then single step in the y-direction
Stepping, by controlling step distance, makes its light beam registration reach 1%-99% in y directions, workbench reversion, the sample adds
Work scope is 126mm x 126mm；
Sample after processing is put into electrically heated drying cabinet and dried after step 3 is laser machined by step 4, sample
It is roasting, depressed in air pressure for normal atmospheric, humidity is 54%RH, temperature is toasted 4 hours for constant temperature under the conditions of 200 DEG C, obtain described
The super-hydrophobic corrosion-resistant surface of cast iron.
Use resistivity for 18.25 megaohms of deionized water, optical contact is utilized using the same method of above-described embodiment 1
The contact angle of the cast iron super-hydrophobicity corrosion-resistant surface obtained described in the test of angle surface interfacial tension measuring instrument, roll angle, water droplet
Volume is 7 microlitres, and test temperature is 25.5 DEG C, and humidity is 19.5%RH.
The super-hydrophobic corrosion-resistant surface of cast iron that the present embodiment is prepared, its microscopic appearance photo is as shown in fig. 7, its surface
Micron-sized cavernous structure is presented.
Shown in the super-hydrophobic corrosion-resistant surface of cast iron and contact angle schematic diagram such as Fig. 3 (e) of water that the present embodiment is prepared,
Shown in roll angle schematic diagram such as Fig. 3 (f).
The super-hydrophobic corrosion-resistant surface of cast iron and the contact angle of water that the present embodiment is prepared are 151.8 °, and roll angle is
4.4 °, test result is shown in Table 1.
Using the identical method of testing of above-described embodiment 1 and test condition by whole surface by the present embodiment method
The cast iron obtained after reason is fully immersed in the above-mentioned NaCl aqueous solution 6 hours, and test obtains the cast iron that the present embodiment is prepared
The rate of corrosion of super-hydrophobicity corrosion-resistant surface is 1.383 × 10-3Mm/a, test result is shown in Table 1.Test result shows the present embodiment
The Cast Iron Surface prepared has excellent decay resistance compared to plain cast iron surface.
Embodiment 4
The method that a kind of utilization ultra-short pulse laser of the present embodiment prepares the super-hydrophobic corrosion-resistant surface of cast iron, including it is following
Specific steps：
Step one, cast iron is polished, polishing is 370W from power, lap speed is 450 revs/min, lap diameter
For 230mm pre-grinding test sample of gold phase machine, polishing process needs the SiC waterproof abrasive papers for aiding in a diameter of 200mm, 1000 mesh in the casting
Iron surface is processed by shot blasting that polishing scope is 100cm2, polishing time 10 minutes, obtain surface polishing after cast iron sample；
Step 2, the cast iron sample after surface polishing described in step one is cleaned with ultrasonic washing instrument, ultrasonic wave cleaning
Instrument ultrasonic frequency is 40kHz, and sample surfaces are flooded for 18.25 megaohms of deionized water with resistivity, at room temperature, continuous clear
Wash 30 minutes, then using washes of absolute alcohol, after cleaning up, room temperature is dried naturally, obtain the cast iron sample of cleaning；
Step 3, using ultrashort pulse laser, laser wavelength is 1064nm, and the cleaning obtained described in step 2 is cast
Iron sample surface is laser machined, and countless micro-structurals is processed in sample surfaces, the pulsewidth of the laser is 10ns, single
Pulse energy is 0.07mJ, and repetition rate is 800kHz, the laser scanning routing motion workbench, will be obtained described in step 2
To clean cast iron sample be fixed on motion workbench on, using lens by laser beam focusing on to the sample, make sample
Focusing of the surface of product relative to the pulse laser light beam etches hot spot along x, y, z three-dimensional direction moving, and speed is
800mm/s, by cast iron sample surfaces described in ablation line by line, realizes the etching of micro-nano structure；The motion platform unit
For three-dimensional servo precision mobile platform, the scope of the platform movement, speed, direction, can be along X, Y, Z tri- by computer control
Direction movement is tieed up, the sample range of work is 150mm x 150mm；
Sample after processing is put into electrically heated drying cabinet and dried after step 3 is laser machined by step 4, sample
It is roasting, depressed in air pressure for normal atmospheric, humidity is 60%RH, temperature is toasted 2 hours for constant temperature under the conditions of 250 DEG C, obtain described
The super-hydrophobic corrosion-resistant surface of cast iron.
It is super-hydrophobic corrosion-resistant using the cast iron obtained described in the identical method of testing of above-described embodiment 1 and test condition test
The contact angle on surface, roll angle.
The super-hydrophobic corrosion-resistant surface of cast iron that the present embodiment is prepared, its microscopic appearance photo is as shown in figure 8, its surface
Micron-sized convex structure is presented.
Shown in the super-hydrophobic corrosion-resistant surface of cast iron and contact angle schematic diagram such as Fig. 4 (g) of water that the present embodiment is prepared,
Shown in roll angle schematic diagram such as Fig. 4 (h).
The super-hydrophobic corrosion-resistant surface of cast iron and the contact angle of water that the present embodiment is prepared are 150.8 °, and roll angle is
8.9 °, test result is shown in Table 1.
Using the identical method of testing of above-described embodiment 1 and test condition by whole surface by the present embodiment method
The cast iron obtained after reason is fully immersed in the above-mentioned NaCl aqueous solution 6 hours, measures the cast iron that the present embodiment prepares super thin
The rate of corrosion of water corrosion-resistant surface is 1.8 × 10-3Mm/a, test result is shown in Table 1.Test result shows that the present embodiment is prepared
Cast Iron Surface there is excellent decay resistance compared to plain cast iron surface.
Table 1 is the super-hydrophobic corrosion-resistant surface contact angle of cast iron, roll angle and the corruption that various embodiments of the present invention are prepared
The test result of erosion rate.
Table 1
| Embodiment | Contact angle/° | Roll angle/° | Rate of corrosion/mm ﹒ a-1 |
| Embodiment 1 | 159.7 | 5.6 | 1.933×10-3 |
| Embodiment 2 | 156.9 | 8.9 | 1.967×10-3 |
| Embodiment 3 | 151.8 | 4.4 | 1.383×10-3 |
| Embodiment 4 | 150.8 | 8.9 | 1.8×10-3 |
The above embodiment of the present invention is not to the present invention just for the sake of clearly illustrating examples of the invention
Embodiment restriction.Every any modification made in spirit of the invention and principle, equivalent substitution and improvement etc. all should
Within the protection domain of the claims in the present invention.
Claims (9)
1. a kind of method that utilization ultra-short pulse laser prepares the super-hydrophobic corrosion-resistant surface of cast iron, it is characterised in that：Methods described
Comprise the following steps：
Step one, pending Cast Iron Surface is polished pretreatment, obtains the cast iron sample after the polishing of surface；
Step 2, the cast iron sample after surface polishing described in step one is placed in the ultrasonic washing instrument for fill deionized water clearly
Wash, then with washes of absolute alcohol, after cleaning up, cast iron sample surfaces cold wind drying or room temperature dried naturally,
Obtain the cast iron sample of cleaning；
Step 3, using laser processing technology, is regulated after the technological parameter of correlation to step 2 using ultrashort pulse laser
The obtained clean cast iron sample surfaces carry out laser scanning processing, and countless micro-structurals are processed in sample surfaces；
The laser scanning carries out light beam scanning using galvanometer system, and the speed of vibration mirror scanning is 0.1mm/s-30m/s, laser
Break-make and the scanning range of galvanometer system, scanning track and process velocity are by computer program control and setting；
Or the laser scanning is realized using motion platform system, and light beam is fixed, the motion of sample relative beam, platform motion
Speed is 0.1mm/s-3m/s, and break-make, platform movement locus and the speed of laser are by computer program control and setting；
Step 4, constant temperature and humidity electric heating is put into by cast iron sample of the surface obtained described in step 3 after Laser Processing is handled
Toasted in drying box, that is, obtain the super-hydrophobic corrosion-resistant surface of the cast iron；
Wherein, the pulse laser wavelength described in step 3 is less than 1550nm, and mean power is less than 80W, the Laser Processing ginseng
Number is：Pulsewidth is more than 10ps, and single pulse energy is less than 0.08mJ；
Pressure described in step 4 in electrically heated drying cabinet is normal atmospheric pressure, and humidity is 40%-60%RH, temperature is 100 DEG C-
250 DEG C, the time that the sample is toasted is that the temperature error in 2-8 hours, the electrically heated drying cabinet is ± 1 DEG C.
2. the method that a kind of utilization ultra-short pulse laser as claimed in claim 1 prepares the super-hydrophobic corrosion-resistant surface of cast iron, its
It is characterised by：The repetition rate of ultrashort pulse laser described in step 3 is 200kHz-1MHz, and the pulsewidth is 10ps-10ns.
3. the method that a kind of utilization ultra-short pulse laser as claimed in claim 2 prepares the super-hydrophobic corrosion-resistant surface of cast iron, its
It is characterised by：The wavelength of the ultrashort pulse laser is 1064nm, and the pulsewidth of the ultrashort pulse laser is 80ps-
10ns。
4. the method that a kind of utilization ultra-short pulse laser as claimed in claim 3 prepares the super-hydrophobic corrosion-resistant surface of cast iron, its
It is characterised by：The pulsewidth of the ultrashort pulse laser is 80ps, and the single pulse energy is 7.5 μ J-8.5 μ J, the laser
Sweep speed is 200mm/s-400mm/s.
5. the method that a kind of utilization ultra-short pulse laser as claimed in claim 3 prepares the super-hydrophobic corrosion-resistant surface of cast iron, its
It is characterised by：The pulsewidth of the ultrashort pulse laser is 10ns, and the single pulse energy is 0.06mJ-0.07mJ, described to swash
Optical scanning speed is 500mm/s-1000mm/s.
6. the method that a kind of utilization ultra-short pulse laser as claimed in claim 4 prepares the super-hydrophobic corrosion-resistant surface of cast iron, its
It is characterised by：The repetition rate of the ultrashort pulse laser is 200kHz.
7. the method that a kind of utilization ultra-short pulse laser as claimed in claim 5 prepares the super-hydrophobic corrosion-resistant surface of cast iron, its
It is characterised by：The repetition rate of the ultrashort pulse laser is 800kHz-900kHz, and the laser scanning speed is 800mm/
s-900mm/s。
8. the method that a kind of utilization ultra-short pulse laser as claimed in claim 1 prepares the super-hydrophobic corrosion-resistant surface of cast iron, its
It is characterised by：Humidity in the constant temperature and humidity electrically heated drying cabinet is 50%RH, and temperature is 100 DEG C, and the time of baking is small for 8
When.
9. the cast iron super hydrophobic surface that a kind of method as described in claim any one of 1-8 is prepared, the surface has
Micron-sized strip, poroid or convex structure.
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