CN109490188A - A kind of metal surface thin liquid film generates, control and measurement method - Google Patents
A kind of metal surface thin liquid film generates, control and measurement method Download PDFInfo
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- 239000007788 liquid Substances 0.000 title claims abstract description 166
- 239000002184 metal Substances 0.000 title claims abstract description 70
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 70
- 238000000691 measurement method Methods 0.000 title claims abstract description 10
- 239000007921 spray Substances 0.000 claims abstract description 44
- 230000008021 deposition Effects 0.000 claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 239000000523 sample Substances 0.000 claims description 134
- 230000007246 mechanism Effects 0.000 claims description 61
- 239000008151 electrolyte solution Substances 0.000 claims description 22
- 239000000835 fiber Substances 0.000 claims description 18
- 238000000889 atomisation Methods 0.000 claims description 15
- 239000013307 optical fiber Substances 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 230000002572 peristaltic effect Effects 0.000 claims description 4
- 238000001228 spectrum Methods 0.000 claims description 3
- 239000003595 mist Substances 0.000 claims 1
- 238000005260 corrosion Methods 0.000 description 29
- 230000007797 corrosion Effects 0.000 description 28
- 238000000034 method Methods 0.000 description 21
- 238000012360 testing method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 3
- 238000007743 anodising Methods 0.000 description 3
- 238000006056 electrooxidation reaction Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
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- 239000001117 sulphuric acid Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
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- 238000007906 compression Methods 0.000 description 2
- 238000007405 data analysis Methods 0.000 description 2
- 238000013480 data collection Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
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- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
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- 230000009514 concussion Effects 0.000 description 1
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- 238000002848 electrochemical method Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/02—Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
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Abstract
The invention discloses a kind of generation of metal surface thin liquid film, control and measurement methods, it is characterised in that: including thin liquid film generating means, sample stage, thin liquid film thickness detection apparatus, control computer；Wherein the thin liquid film generating means include the cabinet with atomizer, reservoir is equipped in the cabinet, the reservoir is connect by pump with the shell of atomizer, the shell is also connected with compressed air, spray pipeline is provided on another side body opposite with the compressed air, the spray pipeline stretches out cabinet and is directed at sample stage；Sample deposition is provided on the sample stage, and the sample deposition is opposite with the outlet of spray pipeline, the sample stage has adjustable inclination angle.Using equipment of the invention, the controllable and stable thin liquid film of thickness can be generated in metal surface.
Description
Technical field:
The present invention relates to the electrochemical measurement systems in the measurement of a kind of atmospheric corrosion, corrosion or anti-corrosion, more particularly to one kind is in gold
The method that metal surface generates, measures and control thin liquid film.
Background technique:
The corrosion of metal in an atmosphere is a kind of electrochemical process, forms thin liquid on the metal surface since steam is agglomerated or adsorbed
Film, corrosion process had not only obeyed the universal law of electrochemical corrosion, but also had the characteristics of atmospheric corrosion itself.Atmospheric corrosion is thin liquid film
Under electrochemical corrosion, corrosion process dynamics (speed) problem is the polarization with electrode (yin, anode), mass transport process and ion
Migration etc. is closely related.Such as metal surface thickness of liquid film increases, oxygen is also increased by effective thickness of diffusion layer of moisture film,
The diffusion of oxygen becomes difficult, therefore corrosion of metal speed also accordingly declines.
Evaporation that metal material in atmospheric environment causes because the environmental factors such as temperature, humidity, rainwater change, cohesion,
The effects of absorption, agglomerates to form thin liquid film in metal surface.Electrochemical corrosion of the metal under thin liquid film is the important of atmospheric corrosion
Feature, and metal atmospheric corrosion rate and its surface thin liquid film thickness are closely related.It is uniform, continuous and controllable to form thickness
Thin liquid film is the necessary condition of simulation reconstruction metal atmospheric corrosion feature, and electrochemistry under research metal material thin liquid film environment
Behavior, mechanism important foundation.
Therefore corrosion process different from metal corrosion in an atmosphere and be completely immersed in electrolyte is traditional in liquid
The classical electrochemical parameter of the metal material obtained under phase environment is also difficult to accurately reflect electricity of the metal under thin liquid film environment
Chemical behavior (atmospheric corrosion).Scientific research proves that thin liquid film electrochemical techniques are particularly suited for the atmospheric corrosion of research metal,
Can also more accurately explain metal atmospheric corrosion mechanism, and the key of the technology be generate uniform and thickness in metal surface can
The thin liquid film of control.
The forming method of existing disclosed metal surface thin liquid film or be placed in metal in liquid then to metal watch
The liquid in face forms thin liquid film after gradually evaporating, or directly pours into liquid in metal surface, is then formed after liquid evaporation
Thin liquid film.The thin liquid film thickness formed in this way can change with the time, and the thickness of its thin liquid film is uncontrollable,
It is unfavorable for carrying out the corrosion test of metal thin liquid film under simulating atmospheric environment.Accordingly, it is desirable to provide one kind can show in metal
Form stable and the thin liquid film of controllable thickness method.
Summary of the invention:
The purpose of the present invention is to provide a kind of metal surface thin liquid films that thin liquid film thickness is controllable and stable to generate, controls and surveys
Amount method.
To achieve the goals above, the present invention is implemented as follows: a kind of metal surface thin liquid film generation method, including it is thin
Liquid film generating means, sample stage, thin liquid film thickness detection apparatus, control computer；Wherein the thin liquid film generating means include
Cabinet with atomizer is equipped with reservoir in the cabinet, and the reservoir is connect by pump with the shell of atomizer, institute
It states atomizer shell and is also connected with compressed air, be provided with spray pipeline on another side body opposite with the compressed air,
The spray pipeline stretches out cabinet and is directed at sample stage；Sample deposition is provided on the sample stage, and the sample is put
It is opposite with the outlet of spray pipeline to set area, the sample stage has adjustable inclination angle；The thin liquid film thickness detection apparatus passes through control
Computer control processed.The spray pipeline output end is connect with fog chamber out, it is described go out fog chamber end face be provided with fog outlet, and
It is provided with opening/shutting valve at the fog outlet, can control the size of fog outlet.The thin liquid film thickness detection apparatus is optical fiber light
Spectrometer, the hapalonychia of the fiber spectrometer are packed into the control computer, and the fibre-optical probe of the fiber spectrometer is arranged described
On the sample stage and alignment sample deposition, the fibre-optical probe can carry out the position adjustment in three directions.In the sample
It is provided with X-axis guide rail mechanism on platform, Y-axis guide rail mechanism is provided on the sample stage and the X-axis guide rail mechanism, described
Z axis guide rail mechanism is provided in Y-axis guide rail mechanism, the fibre-optical probe is fixed in the Z axis guide rail mechanism.In the liquid storage
Having heaters is arranged in bottom in slot.
And follow the steps below the generation of thin liquid film:
Step 1: metal sample is placed in the sample deposition on sample stage；
Electrolyte solution is heated to 30 to position, heater is demarcated step 2: electrolyte solution is added into reservoir
℃；
Step 3: starting by sequence atomizer, air compressor, circulation peristaltic pump and sample stage, the atomization quantity of adjusting atomizer
For 2.5kg/h~4.5kg/h, fog presses 0.1~0.15 Mpa out, and sample stage inclination angle is 0~60 °；
Step 4: being adjusted by the displacement that control computer controls X-axis guide rail mechanism, Y-axis guide rail mechanism and Z guide rail mechanism
The position of fibre-optical probe, operation fiber spectrometer control software, adjust fibre-optical probe position, optimize signal strength；
Step 5: controlling fog-supplying amount, the variation of sample stage pitch angle control thickness of liquid film by the valve for controlling out fog chamber；Pass through optical fiber
Spectrometer carries out real-time measurement, and recording detection data to thickness of liquid film.
For further convenient for control, the X-axis guide rail mechanism, Y-axis guide rail mechanism, Z axis guide rail mechanism pass through motor driven
Leadscrew-nut mechanism is constituted.
For the stability for being further ensured that spray, the atomizer is also connected to overflow launder, and the overflow launder passes through overflow
Pipe is connected to reservoir.
For the stability for being further ensured that spray, it is additionally provided with temperature sensor on the reservoir inner wall and liquid level passes
Sensor.
Preferably, the cabinet has case lid, and the lower box is additionally provided with water outlet.
To further provide for stable thin liquid film thickness, the spray pipeline is formed after being stretched out from cabinet it is first upward again to
Under convex closure after again with it is described go out fog chamber connect.
The utility model has the advantages that
Using metal surface thin liquid film generation method of the invention, first can form the thin liquid of constant thickness on metal sample surface
Film, second accurately controls the thickness of thin liquid film, obtains the thin liquid film of the thickness of experiment demand.
The spray of generation method blowout of the present invention and the thin liquid film on metal sample surface keep blowing after reaching vapor liquid equilibrium
Spray amount out, the thin liquid film thickness of metal surface tends towards stability at this time, will not be subsequent in order to carry out with time change
The corrosion test of metal thin liquid film under simulating atmospheric environment.
And metal surface thin liquid film of the invention can be by adjusting sample angle, so that being blown into spray thereon by not
Same external force, and the thin liquid film of different-thickness can be obtained under the action of different external force.And fiber spectrometer can be passed through
Real-time detection controls to obtain reality to the thickness of thin liquid film by the cooperation of the rotating mechanism and fiber spectrometer that are arranged on sample stage
Required thin liquid film thickness is tested, and thickness is accurate.Be conducive to carry out the corrosion test of metal thin liquid film under simulating atmospheric environment.
In addition, can also further control the thickness of thin liquid film by controlling the flow of spray, be conducive to carry out gold under simulating atmospheric environment
Belong to the corrosion test of thin liquid film.
The sample stage can also directly connect the corrosion test for directly carrying out metal surface thin liquid film with electrochemical workstation,
And then provide it is a set of can under simulated atmosphere corrosive environment in laboratory conditions metal erosion behavior equipment.The function of equipment
Can, realization thin liquid film first controllably generates, that is, includes thin liquid film generation, control and measurement；Further implement gold under controllable environment
Belong to atmospheric corrosion test, is measured by electrochemical workstation test analysis corrosion current and metal polarization curve；Wherein, each ginseng
Number control, data collection, data analysis etc. are integrated into computer control terminal, realize the automation of test.
In addition, the configuration of the present invention is simple is easily controllable, convenient for operation.
Detailed description of the invention:
Fig. 1 is the axonometric drawing of thin liquid film generating means；
Fig. 2 is the main view of thin liquid film generating means；
Fig. 3 is the left view of thin liquid film generating means；
Fig. 4 is the top view of thin liquid film generating means；
Fig. 5 is sample stage main view；
Fig. 6 is sample stage top view；
Fig. 7 is sample stage left view；
Fig. 8 is the thin liquid film thickness changing trend figure of the example one in embodiment 3；
Fig. 9 is the thin liquid film thickness changing trend figure of the example two in embodiment 3；
Figure 10 is trend chart of the thin liquid film thickness of the example two in embodiment 3 under the conditions of existing generation method；
Figure 11 is the thin liquid film thickness changing trend figure of the example three in embodiment 3；
Figure 12 is trend chart of the thin liquid film thickness of the example three in embodiment 3 under the conditions of existing generation method；
Figure 13 is the schematic diagram of metal surface thin liquid film generating device of the invention.
Specific embodiment:
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing, but the invention is not limited to this
A little embodiments, any improvement or replacement on the present embodiment essence spirit still fall within the required guarantor of the claims in the present invention
The range of shield.
Embodiment 1: as shown in figs. 1-7, a kind of metal surface thin liquid film generating device, including thin liquid film generating means, sample
Sample platform, thin liquid film thickness detection apparatus, control computer.
Wherein, the thin liquid film generating means include the cabinet with atomizer, and reservoir, institute are equipped in the cabinet
It states reservoir to connect by pump with the shell of atomizer, the shell of the atomizer is also connected with compressed air, with the compression
Spray pipeline is provided on the opposite another side body of air, the spray pipeline stretches out cabinet and is directed at sample stage.
It is provided with sample deposition on the sample stage, metal sample is placed on the sample deposition, and
The outlet of spray pipeline is directed at the metal sample.Wherein, position can be fixed or can be carried out in the exit of the spray pipeline
It adjusts.
In addition, the sample stage side is connect with mechanism is chosen to install, so that the tilt angle of sample stage is changeable, further may be used
Change the tilt angle of sample.And the angle for adjusting sample stage can have and be reached by various mechanism, for example sample stage is lived on one side
Dynamic hinged, another side is movable upward or downward using mandril, achievees the purpose that the angle for changing sample stage.In the present embodiment,
Achieve the purpose that sample stage rotates using gear rotating mechanism.Specifically, one side and the rotating mechanism of the sample stage
It is connected, the sample stage another side is connect by cylinder or hydraulic cylinder with rack.The rotating mechanism includes motor, the motor
Output shaft is connect with speed reducer, and the output shaft and driving gear of the speed reducer are connected, and the driving gear and driven gear
Engaged transmission, and the gear shaft of the driven gear is then connected with sample stage, in this way, start motor, drives driven gear
Rotation, and driven gear rotation will then drive sample stage rotation.
Using above equipment, spray is formed by thin liquid film generating means, spray is blown into sample stage by spray pipeline
On the metal sample of upper placement, spray takes part of the condensate to form liquid after touching metal sample, and liquid is from sample surfaces stream
It crosses to form thin liquid film, after reaching vapor liquid equilibrium to spray and thin liquid film, the thickness of thin liquid film is just settled out.And adjust metal-like
The tilt angle of product, different tilt angles can then generate different external forces to thin liquid film, and external force controls thin liquid film flow velocity；
External force is bigger, then thin liquid film is easier to flow, and thin liquid film thickness is then thinner；Conversely, external force is smaller, thin liquid film mobilization dynamic becomes smaller,
Thin liquid film then thickens.Therefore, tuning up sample stage inclination angle makes it be easier to obtain thinner thin liquid film closer to vertical direction, turns sample down
Sample platform inclination angle makes it be easier to obtain thicker thin liquid film closer to horizontal direction.
Embodiment 2: as shown in Fig. 1-7 and 13, a kind of metal surface thin liquid film generating device, including thin liquid film generate dress
It sets, sample stage, thin liquid film thickness detection apparatus, control computer.
The thin liquid film generating means include the cabinet 2 with atomizer 1, and reservoir 3 is equipped in the cabinet, described
Reservoir is connect by pump 4 with the shell 5 of atomizer, and the shell of the atomizer is also connected with compressed air, with the compression
Spray pipeline 6 is provided on the opposite another side body of air, the spray pipeline stretches out cabinet and is directed at sample stage.
Wherein, the outlet of the spray pipeline is also connected with out fog chamber 7, and the fog chamber end face out is provided with fog outlet
71.And the fog outlet sees the size being open by valve actuator, and then adjusts spray amount.
The cabinet includes case ontology 21 and case lid 22, reservoir is formed in the case body lower part, in the reservoir
It is inside loaded with electrolyte solution, atomizer is additionally provided in the cabinet, the atomizer has shell, in atomizer shell
Interior setting nebulising element, the atomizer are higher than reservoir liquid level, are pumped into the electrolyte solution in reservoir by circulating pump
It is atomized into the atomizer.
And the cabinet of the atomizer also passes through horizontal pipe and connect with overflow launder 8, the overflow launder passes through overflow pipe again
It is connected with reservoir.Wherein, the overflow launder may be provided at any one position of the atomizer, but in the present embodiment
In, the overflow launder is arranged between the circulating pump and the atomizer.That is the circulating pump is existing by electrolyte
Solution is pumped into overflow launder, then electrolyte solution is transported to atomization by the horizontal pipe between overflow launder and atomizer cabinet
In device.In this way, which the water level in a certifiable atomizer remains at a constant position, guarantee the spray to be formed
Stability；And it recycles may make the electrolyte solution in reservoir to be formed, guarantees the stability of electrolyte solution.The circulation
Pump uses wriggling circulating pump.
In addition, having heaters 9 is arranged in bottom in the sink.Temperature sensing is additionally provided on the inboard wall of cistern
Device.Liquid level sensor is additionally provided on the inboard wall of cistern.By heating gas and temperature sensor, it is adjusted in reservoir
The temperature of electrolyte solution the Wen Di of the electrolyte solution is adjusted to 30 DEG C or so in the present embodiment, using this temperature
Degree one can form relatively stable spray, and two can be improved the condensing rate of electrolyte solution atomization and spray.And
The position of electrolyte solution can be monitored by liquid level sensor.
It is additionally provided with electronic box 10 in the side of case ontology, for providing power supply for heater, the heater in the present embodiment
To be commercially available, conventional electricity fever heater.
The commercially available atomizer that atomizer in the present embodiment uses, specific producer are as follows: Dongguan City Chu Lin electricity
Sub- Science and Technology Ltd., model are as follows: CL-250W-4.5 or CL-180W-2.5.
As another embodiment of the present embodiment, the lower box is additionally provided with water outlet 23.It can be kept away by case lid
Exempt from the substances such as volatilization and the dust of electrolyte solution and enters electrolyte solution, and can be to the electricity in reservoir by water outlet
Electrolyte solution is replaced.
As another embodiment of the present embodiment, the spray pipeline 6 is formed after being stretched out from cabinet it is first upward again to
Under convex closure 61 after with it is described go out fog chamber connect.By the setting of convex closure, the process that spray flows up in spray pipeline,
Big partial size drop can be flowed back into atomizer under gravity by spray pipeline to be atomized again, compared with the micro- liquid of small particle
Drop is exported with pipeline, more ensure that the control stability of thin liquid film thickness.
In addition, being provided with sample deposition 111 on the sample stage 11, and the sample deposition and atomisation outlet phase
Right, the sample stage has adjustable inclination angle.
Wherein, the angle for adjusting sample stage can have to be reached by various mechanism, for example sample stage is movably hinged on one side, separately
It is movable upward or downward using mandril on one side, achieve the purpose that the angle for changing sample stage.
In the present embodiment, achieve the purpose that sample stage rotates using gear rotating mechanism 12.Specifically, described
One side of sample stage is connected with rotating mechanism, and the another side of the sample stage is connect by cylinder or hydraulic cylinder with rack.It is described
Rotating mechanism includes motor, and the output shaft speed reducer connection of the motor, the output shaft and driving gear of the speed reducer is connected,
And the driving gear and driven gear engaged transmission, and the gear shaft of the driven gear is then connected with sample stage, such one
Come, start motor, drives driven gear rotation, and driven gear rotation will then drive sample stage rotation.
Wherein, the sample stage is arranged in rack 13, the gear shaft both ends of the driven gear by bearing with
Rack connection.
The thickness for the thin liquid film that metal surface is formed is measured in real time in addition, being additionally provided with fiber spectrometer, optical fiber
The software access computer of spectrometer, and sample deposition described in 17 face of fibre-optical probe of fiber spectrometer, and the optical fiber is visited
Head has the position adjustment that can carry out three directions.In order to which Thickness sensitivity can be carried out to the different location of metal thin liquid film.
Specifically: X-axis guide rail mechanism 14, Y-axis guide rail mechanism 15 and Z axis guide rail mechanism are provided on the sample stage
16, and the X-axis guide rail mechanism, Y-axis guide rail mechanism, Z axis guide rail mechanism are made up of motor driven leadscrew-nut mechanism.
Wherein, the lead screw of the X-axis guide rail mechanism is arranged on sample stage, and the lead screw of the Y-axis guide rail mechanism is arranged
On the nut platform and sample stage of X-axis guide rail mechanism, and the lead screw of the Z axis guide rail mechanism is vertically provided at the Y-axis guide rail
On the nut platform of mechanism, the fibre-optical probe is then arranged on the nut platform of the Z axis guide rail mechanism.And the X-axis guide rail machine
Structure, Y-axis guide rail mechanism, Z guide rail mechanism pass through motor driven.
The fiber spectrometer measuring principle: when incident light penetrates the interface of different material that the light for having part is anti-
It penetrates, since the fluctuation of light causes the reflected light from multiple interfaces to interfere with each other, so that the multi-wavelength spectrum of reflected light be made to generate
The phenomenon that concussion.From the oscillation frequency of spectrum, it can be determined that the distance at different interfaces obtains the thickness of material in turn, shakes bigger
It is bigger to represent film thickness.
Fiber spectrometer in the present embodiment is the existing product of market purchasing, producer are as follows: U.S. filmetrics, type
Number are as follows: F3-s980
Using the present embodiment equipment, electrolyte solution is added in the reservoir, is pumped into solution by wriggling circulating pump
In overflow launder, the solution in overflow launder is flowed into atomizer by horizontal pipe to be atomized, after electrolyte solution atomization
It is blown out by compressed air from spray pipeline, and spray is flowed into out fog chamber, and the fog outlet by going out fog chamber setting by pipeline
Outflow, the fog outlet face metal sample, and spray takes part of the condensate to form liquid after touching metal sample, liquid from
Sample surfaces flow through to form thin liquid film.And by adjusting sample angle, so that it is blown into spray thereon by different external force,
And the thin liquid film of different-thickness can be obtained under the action of different external force.And it can be arrived by the real-time detection of fiber spectrometer
The thickness of thin liquid film obtains testing required thin by the cooperation control of the rotating mechanism that is arranged on sample stage and fiber spectrometer
Thickness of liquid film, and thickness is accurate.Be conducive to carry out the corrosion test of metal thin liquid film under simulating atmospheric environment.
Wherein, the control computer is not only able to the thickness that the be irradiated to thin liquid film of fiber spectrometer probe is read in control
Degree further controls optical fiber also by being electrically connected the displacement of adjustable X-axis guide rail mechanism, Y-axis guide rail mechanism and Z guide rail mechanism
The position of probe.In addition, the temperature of the also controllable heater of control computer, the out size of the opening of fog chamber, circulating pump
Opening and closing, opening and closing, the opening and closing of rotating mechanism of atomizer etc..
And the sample stage can be directly connected to electrochemical workstation, directly carry out the corrosion test of metal thin liquid film.It is described
Electrochemical workstation can also be electrically connected with control computer realization.That is present embodiments provide it is a set of can be in laboratory condition
The equipment of metal erosion behavior under Imitating atmospheric corrosion environment.The function of equipment, first realization thin liquid film are controllably generated, that is, are wrapped
Thin liquid film is included to generate, control and measure；Further implement metal atmospheric corrosion under controllable environment to test, passes through electrochemical workstation
Test analysis corrosion current and metal polarization curve measurement；Wherein, each state modulator, data collection, data analysis etc. are integrated into
Computer control terminal realizes the automation of test.
Using the metal surface thin liquid film generating device of the present embodiment, first can form constant thickness on metal sample surface
Thin liquid film, second accurately controls the thickness of thin liquid film, obtains the thin liquid film of the thickness of experiment demand.
Embodiment 3: as Fig. 8-12 present embodiments provides a kind of metal surface thin liquid film generation method, including following step
It is rapid:
Step 1: metal sample is placed in the sample deposition on sample stage；
Electrolyte solution is heated to 30 to position, heater is demarcated step 2: electrolyte solution is added into reservoir
℃；
Step 3: starting by sequence atomizer, air compressor, circulation peristaltic pump and sample stage, the atomization quantity of adjusting atomizer
For 2.5kg/h~4.5kg/h, fog presses 0.1~0.15 Mpa out, and sample stage inclination angle is 0~60 °；
Step 4: being adjusted by the displacement that control computer controls X-axis guide rail mechanism, Y-axis guide rail mechanism and Z guide rail mechanism
The position of fibre-optical probe, operation fiber spectrometer control software, adjust fibre-optical probe position, optimize signal strength；
Step 5: controlling fog-supplying amount, the variation of sample stage pitch angle control thickness of liquid film by the valve for controlling out fog chamber；Pass through optical fiber
Spectrometer carries out real-time measurement, and recording detection data to thickness of liquid film.
According to the method described above, three groups of examples are present embodiments provided:
Example one:
Metallic matrix: 2A12 aluminium alloy, the processing of surface sulphuric acid anodizing；
Environment temperature: 20 degrees Celsius；
Envionmental humidity: 65%；
Atomizer atomization quantity: 2.5kg/h；
Fog pressure out: 0.1Mpa；
30 degrees Celsius of solution temperature；
Sample stage inclination angle: 25 degree.
According to the experimental data of example one obtain with a thickness of 50~60 μm of thin liquid film, and thin liquid film is through 1600s thickness
Spend constant, Fig. 8 shows the trend that thin liquid film thickness changes over time in example one.
Example two:
Metallic matrix: 2A12 aluminium alloy, the processing of surface sulphuric acid anodizing；
Environment temperature: 20 degrees Celsius；
Envionmental humidity: 65%；
Atomizer atomization quantity: 4.5kg/h；
Fog pressure out: 0.1Mpa；
30 degrees Celsius of solution temperature；
Sample stage inclination angle: 15 degree.
According to the experimental data of example one obtain with a thickness of 190 μm or so of thin liquid film, and thin liquid film is through 1600s thickness
Spend constant, Fig. 9 shows the trend that thin liquid film thickness changes over time in example two.
And Figure 10 shows the trend that 190 μm under existing thin liquid film generation method of thin liquid film changes over time, it can
It will become apparent from the variation with the time, thin liquid film is extremely unstable, and the thickness of thin liquid film is gradually reduced as time increases.
Example three:
Metallic matrix: 2A12 aluminium alloy, the processing of surface sulphuric acid anodizing；
Environment temperature: 20 degrees Celsius；
Envionmental humidity: 65%；
Atomizer atomization quantity: 4.5kg/h；
Fog pressure out: 0.15Mpa；
Solution temperature: 30 degrees Celsius；
Sample stage inclination angle: 5 degree.
According to the experimental data of example one obtain with a thickness of 450~460 μm or so of thin liquid film, and thin liquid film passes through
1600s thickness is constant, and Figure 11 shows the trend that thin liquid film thickness changes over time in example three.
And Figure 12 shows the trend that 457 μm under existing thin liquid film generation method of thin liquid film changes over time, it can
It will become apparent from the variation with the time, thin liquid film is extremely unstable, and the thickness of thin liquid film is gradually reduced as time increases.
To sum up, using the generation method of the metal surface thin liquid film of the present embodiment, the thin liquid film of constant thickness can be obtained, and
Pass through the thickness for controlling sample stage inclination angle, going out the adjustable thin liquid films such as fog pressure, atomizer atomization quantity.
Claims (7)
1. a kind of metal surface thin liquid film generation, control and measurement method, it is characterised in that: including thin liquid film generating means, sample
Sample platform, thin liquid film thickness detection apparatus, control computer；
Wherein, the thin liquid film generating means generate spray and are blown by spray pipeline to metal sample, on the sample stage
It is provided with sample deposition and the sample stage has adjustable inclination angle, the thin liquid film thickness detection apparatus includes that setting exists
The fibre-optical probe of three coordinate control instrument and the fiber spectrometer being arranged on controller on sample stage, the fiber spectrometer
Software be packed into control computer；
And follow the steps below the generation of thin liquid film:
Step 1: metal sample is placed in the sample deposition on sample stage；
Step 2: opening, thin liquid film generating means generate spray and the metal sample surface placed on sample stage is blown into,
Step 3: adjust thin liquid film generating means spray atomization quantity be 2.5kg/h~4.5kg/h, out fog pressure 0.1~
0.15 Mpa, sample stage inclination angle are 0~60 °；
Step 4: controlling the position that three coordinate control instrument adjust fibre-optical probe by control computer, fiber spectrum is run
Instrument control software adjusts fibre-optical probe position, optimizes signal strength；
Step 5: passing through control fog-supplying amount, the variation of sample stage pitch angle control thickness of liquid film；By fiber spectrometer to thickness of liquid film
Carry out real-time measurement, and recording detection data.
2. the generation of metal surface thin liquid film, control and measurement method as described in claim 1, it is characterised in that: the thin liquid
Film generating means include the cabinet with atomizer, and reservoir is equipped in the cabinet, and the reservoir passes through pump and atomization
The shell of device connects, and the shell is also connected with compressed air, is provided on another side body opposite with the compressed air
Spray pipeline, the spray pipeline output end are connect with fog chamber out, and the fog chamber end face out is provided with fog outlet, the mist out
Mouth alignment sample stage, and still there was only switch-mode regulation valve at the fog outlet；
And follow the steps below the generation of thin liquid film:
Step 1: metal sample is placed in the sample deposition on sample stage；
Step 2: electrolyte solution is added into reservoir to demarcating position；
Step 3: starting by sequence atomizer, air compressor, circulation peristaltic pump and sample stage, the atomization quantity of adjusting atomizer
For 2.5kg/h~4.5kg/h, fog presses 0.1~0.15 Mpa out, and sample stage inclination angle is 0~60 °；
Step 4: adjusting the position of fibre-optical probe by the position that control computer controls three coordinate control instrument, light is run
Optical fiber spectrograph controls software, adjusts fibre-optical probe position, optimizes signal strength；
Step 5: controlling fog-supplying amount, the variation of sample stage pitch angle control thickness of liquid film by the valve for controlling out fog chamber；Pass through optical fiber
Spectrometer carries out real-time measurement, and recording detection data to thickness of liquid film.
3. the generation of metal surface thin liquid film, control and measurement method as claimed in claim 2, it is characterised in that: in the storage
Temperature sensor and liquid level sensor are additionally provided on liquid bath inner wall；The three coordinate controls instrument includes setting on the sample stage
The X-axis guide rail mechanism set, the Y-axis guide rail mechanism being arranged on the sample stage and the X-axis guide rail mechanism, leads in the Y-axis
The Z axis guide rail mechanism being arranged on rail mechanism, the fibre-optical probe are fixed in the Z axis guide rail mechanism；
And follow the steps below the generation of thin liquid film:
Step 1: metal sample is placed in the sample deposition on sample stage；
Electrolyte solution is heated to 30 to position, heater is demarcated step 2: electrolyte solution is added into reservoir
℃；
Step 3: starting by sequence atomizer, air compressor, circulation peristaltic pump and sample stage, the atomization quantity of adjusting atomizer
For 2.5kg/h~4.5kg/h, fog presses 0.1~0.15 Mpa out, and sample stage inclination angle is 0~60 °；
Step 4: being adjusted by the displacement that control computer controls X-axis guide rail mechanism, Y-axis guide rail mechanism and Z guide rail mechanism
The position of fibre-optical probe, operation fiber spectrometer control software, adjust fibre-optical probe position, optimize signal strength；
Step 5: controlling fog-supplying amount, the variation of sample stage pitch angle control thickness of liquid film by the valve for controlling out fog chamber；Pass through optical fiber
Spectrometer carries out real-time measurement, and recording detection data to thickness of liquid film.
4. the generation of metal surface thin liquid film, control and measurement method as claimed in claim 3, it is characterised in that: the X-axis is led
Rail mechanism, Y-axis guide rail mechanism, Z axis guide rail mechanism are made up of motor driven leadscrew-nut mechanism.
5. the generation of metal surface thin liquid film, control and measurement method as claimed in claim 4, it is characterised in that: the atomization
Device is also connected to overflow launder, and the overflow launder is connected to by overflow pipe with reservoir.
6. the generation of metal surface thin liquid film, control and measurement method as claimed in claim 5, it is characterised in that: the cabinet
With case lid, the lower box is additionally provided with water outlet.
7. the generation of metal surface thin liquid film, control and measurement method as claimed in claim 6, it is characterised in that: the conveying
Pipeline is formed after convex closure first upwards still further below after being stretched out by cabinet and is connect again with the fog chamber out.
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