CN105466823A - Test method for simulating deposition of aerosol on surface of sample - Google Patents
Test method for simulating deposition of aerosol on surface of sample Download PDFInfo
- Publication number
- CN105466823A CN105466823A CN201610021923.4A CN201610021923A CN105466823A CN 105466823 A CN105466823 A CN 105466823A CN 201610021923 A CN201610021923 A CN 201610021923A CN 105466823 A CN105466823 A CN 105466823A
- Authority
- CN
- China
- Prior art keywords
- sample
- sample surfaces
- deposition
- test method
- spray gun
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/04—Investigating sedimentation of particle suspensions
Abstract
The invention discloses a test method for simulating deposition of aerosol on the surface of a sample. The test method comprises the steps that a NaCl and MgSO4 mixed salt solution and absolute ethyl alcohol are mixed according to the volume ratio of 1:1, and a spray gun is used for evenly spraying the mixed salt solution to the deposition surface of the sample; crystal bodies are formed after rapid drying, the particle granularity of the mixed salt deposited on the surface of the sample is controlled by controlling the matching ratio of the mixed salt solution, the spray head caliber, spray nozzle air pressure, the spray gun walking speed, the perpendicular distance between a spray nozzle and the surface of the sample and the like, and salt granules form aerosol liquid drops after naturally absorbing moisture at the certain temperature and humidity. The test method has the simulation, controllability and reproducibility and can be used for researching the aerosol corrosion behavior caused when the aerosol in atmosphere environment is deposited on the surface of the sample.
Description
Technical field
The present invention relates to the aerosol art in simulated atmosphere corrosion environment, be specifically related to the test method that a kind of Simulated gas colloidal sol deposits at sample surfaces.
Background technology
Gasoloid (aerosol) is a kind of gas dispersion system, is that the solid of 1 ~ 100 μm or liquid fine particle disperse and be suspended in gas medium mainly with particle size.Such as, the haze weather taken place frequently has adsorbed (NH by solid fine particle in air
4)
2sO
4, NH
4cl, (NH
4)
3h (SO
4)
2(NH
4) HSO
4deng the gasoloid that fume is formed.The gasoloid that coastland is formed based on drop fine particle is main mainly with NaCl crystal grain, and the particulate in addition containing other compositions a small amount of, as MgCl
2, KCl and CaCl
2deng.Which kind of gasoloid particle all has good hydroscopicity, once be deposited on material surface, will form microlayer model under suitable relative humidity, not only have very high ion concentration in microlayer model, and can the corrosion process of accelerated material.Study the character such as surperficial aerocolloidal particle diameter, chemical composition and pH value and all far-reaching influence is produced to the material corrosion process in atmospheric environment.In addition, containing corrosive substance in atmospheric aerosol, as sulfate, chloride etc., constantly deposit at material surface with gasoloid, pollutant levels constantly raise, and result in the raising of metal Initial Corrosion speed.
Along with the further investigation for gasoloid corrosion impact in atmospheric environment, speeding-up simulation experiment in laboratory compensate for long, the shortcoming such as data influence is complicated outdoor exposure experimental period, and can within a short period of time, accurately the gasoloid corrosion behavior that material occurs under gasoloid environment is analyzed.But, due to the characteristic of gasoloid system, in experimentation, to the size of sample surfaces deposited aerosols drop and quantity, there is uncontrollability, make the research for gasoloid corrosion behavior not energetic.
Summary of the invention
For deficiency existing in existing laboratory simulation aerosol experiment, the invention provides the test method that a kind of Simulated gas colloidal sol deposits at sample surfaces, the aerosol particle that the method can realize depositing can in natural moisture absorption under comparatively low humidity, the aerosol droplets controlled diameter formed after moisture absorption, aerosol droplets is controlled at the deposition of sample surfaces.
For achieving the above object, the technical solution adopted in the present invention is as follows:
The test method that a kind of Simulated gas colloidal sol deposits at sample surfaces, the method, first at the salt-mixture particle of the required particle diameter of sample surfaces deposition, then makes the sample of deposition salt particle form aerosol droplets at sample surfaces after natural moisture absorption under the temperature and humidity of setting; The method specifically comprises the steps:
(1) preparation of mixing salt solution:
Preparation NaCl and MgSO
4mixing salt solution, wherein Na
+concentration is 0.5mol/L ~ 1.5mol/L, Mg
2+concentration is 0.17mol/L ~ 0.51mol/L, Cl
-concentration is 0.5mol/L ~ 1.5mol/L, SO
4 2-concentration is 0.17mol/L ~ 0.51mol/L;
(2) deposition of salt particle:
By the mixing salt solution in step (1) and absolute ethyl alcohol according to 1:(1 ~ 2) volume ratio Homogeneous phase mixing, pour in spray gun NaOH solution tank NaOH, use spray gun that solution in tank is injected into sample surfaces, then sample is put into the baking oven that temperature constant is 75 ~ 85 DEG C, dry 5 ~ 20min, namely obtain the sample of surface deposition salt particle;
(3) sample of deposition salt particle is put into the high/low temperature damp heat box of temperature 30 ± 5 DEG C, humidity 40 ± 2RH, after making the moisture absorption of sample surfaces salt particle nature, namely form aerosol droplets; The diameter of the aerosol droplets formed is 1 ~ 60 μm.
Above-mentioned steps (2) is sprayed in sample, by control spray gun bore, spout air pressure, spray gun walking speed and shower nozzle and sample surfaces vertical range come particle diameter and the deposition of Quality control surface deposition salt particle; Wherein: muzzle footpath is 0.3 ~ 0.5mm, spray gun walking speed is 20 ~ 30cm/s, gun slot is 20 ± 2cm to the distance of sample surfaces; Spout pressure is 0.5 ~ 1.0MPa.The setting of above-mentioned technological parameter can the particle diameter of Quality control surface deposition salt particle at 1 ~ 60 μm.
Above-mentioned steps (2) is sprayed in sample, and spray gun does at the uniform velocity to-and-fro movement along sample surfaces center line, and during to-and-fro movement, spray gun exceeds the distance of sample left and right edges is 5 ± 2cm; Controlled in the deposition of the gasoloid crystal grain of sample surfaces and deposited particles size by reciprocating number of times.
Advantage of the present invention and beneficial effect are:
1, adopt the inventive method can aerocolloidal composition in simulating atmospheric environment.
2, the present invention can deposit minimum aerosol particle at sample surfaces, and particle size range is 1 ~ 60 μm.
3, the salt particle that deposits at sample surfaces of the present invention can natural moisture absorption at a lower humidity, forms aerosol droplets.
4, the present invention can the gasoloid particle diameter of Quality control surface deposition and quantity.
Accompanying drawing explanation
Fig. 1 is experiment process figure of the present invention; A () sprays one piece of sample; B () sprays polylith sample.
Fig. 2 is aerosol droplets deposition picture after reciprocal 1 time of shower nozzle of the present invention.
Fig. 3 is aerosol droplets deposition picture after reciprocal 2 times of shower nozzle of the present invention.
Fig. 4 is aerosol particle deposition picture after reciprocal 4 times of shower nozzle of the present invention
Fig. 5 is picture after the moisture absorption of Fig. 4 aerosol particle
In figure: 1-spray gun; 2-sample; 3-sample surfaces center line.
Embodiment
The present invention is the test method that Simulated gas colloidal sol deposits at sample surfaces, and the method technological process as shown in Figure 1.In following examples adopt article to comprise: NaCl and MgSO
4mixed solution, microslide is some, and bore is the spray gun of 0.3mm, pressure control in the paint spray booth of 0.6MPa, baking oven, high/low temperature damp heat box.
In test method of the present invention, by NaCl and MgSO of different ratio
4after salt solusion mixes with alcohol, spray gun is used equably mixed solution to be sprayed onto sample deposition face, by controlling the vertical range of shower nozzle bore, gun slot air pressure, spray gun walking speed and shower nozzle and sample surfaces, depositing salt-mixture particle at sample surfaces, after flash baking, forming crystalline solid.Under certain temperature and humidity, after natural moisture absorption, form aerosol droplets.Following examples operating process is: with ultrapure water and molecular weight be 58.44 NaCL and molecular weight be the MgSO of 246.47
4compounding medicine mixed solution, effects of ion mol ratio is as table 1.Volume ratio by 1:1 after solution prepares mixes with absolute ethyl alcohol, pours in spray gun NaOH solution tank NaOH.Microslide alcohol is dried after-blow do, put into valve bag and seal up for safekeeping.Use the spray gun that bore is 0.3mm, controlling gun slot pressure is 0.6MPa, at distance sample surfaces 20cm place, does at the uniform velocity to-and-fro movement along sample surfaces center line.Each to-and-fro movement needs to exceed sample area right boundary 5cm.And control with reciprocating number of times the deposition and the grain size that are deposited over the gasoloid crystal grain of sample surfaces.After to be deposited, microslide is put into the baking oven that temperature constant is 80 DEG C, flash baking 10min.Then, the microslide having deposited salt particle is put into the high/low temperature damp heat box of temperature 30 DEG C, humidity 40RH, after making the moisture absorption of sample surfaces salt particle, form aerosol droplets.Under metaloscope, the aerosol droplets diameter formed after measuring crystal grain moisture absorption.
Table 1: mixed solution mol ratio (mol/L)
Embodiment 1
As shown in Figure 2, shower nozzle moves reciprocatingly 1 time, sample surfaces deposition salt crystal particle diameter at 3 ~ 30 μm.The salt particle of deposition forms aerosol droplets after moisture absorption in the high/low temperature damp heat box of temperature 30 DEG C, humidity 40RH.After statistics, diameter is on average at 5 μm, and maximum gauge is no more than 8 μm.
Embodiment 2
As shown in Figure 3, shower nozzle moves reciprocatingly 2 times, sample surfaces deposition salt crystal particle diameter at 3 ~ 30 μm.The aerosol droplets that the salt particle deposited is formed after moisture absorption in the high/low temperature damp heat box of temperature 30 DEG C, humidity 40RH.After statistics, diameter is on average at 10 μm, and maximum gauge is no more than 21 μm.
Embodiment 3
As illustrated in figures 4-5, shower nozzle moves reciprocatingly 4 times, sample surfaces deposition salt crystal particle diameter at 3 ~ 30 μm.The aerosol droplets that the salt particle deposited is formed after moisture absorption in the high/low temperature damp heat box of temperature 30 DEG C, humidity 40RH.After statistics, diameter is on average at 20 μm, and maximum gauge is no more than 31 μm.
From example 1,2,3, the present invention is reproducible, and can control size and the dispersiveness of deposited aerosols particle diameter.The aerosol droplets diameter calculated after statistics has directly related property with the reciprocating number of times of shower nozzle, and when other conditions are fixing, shower nozzle to-and-fro movement number of times increases, then aerosol droplets diameter increases.
Claims (8)
1. the test method that deposits at sample surfaces of a Simulated gas colloidal sol, it is characterized in that: the method, first at the salt-mixture particle of the required particle diameter of sample surfaces deposition, then makes the sample of deposition salt particle form aerosol droplets at sample surfaces after natural moisture absorption under the temperature and humidity of setting.
2. the test method that deposits at sample surfaces of Simulated gas colloidal sol according to claim 1, is characterized in that: the method specifically comprises the steps:
(1) preparation of mixing salt solution:
Preparation NaCl and MgSO
4mixing salt solution, wherein Na
+concentration is 0.5mol/L ~ 1.5mol/L, Mg
2+concentration is 0.17mol/L ~ 0.51mol/L, Cl
-concentration is 0.5mol/L ~ 1.5mol/L, SO
4 2-concentration is 0.17mol/L ~ 0.51mol/L;
(2) deposition of salt particle:
By the mixing salt solution in step (1) and absolute ethyl alcohol according to 1:(1 ~ 2) volume ratio Homogeneous phase mixing, pour in spray gun NaOH solution tank NaOH, use spray gun that solution in tank is injected into sample surfaces, then sample is put into the baking oven that temperature constant is 75 ~ 85 DEG C, dry 5 ~ 20min, namely obtain the sample of surface deposition salt particle;
(3) sample of deposition salt particle is put into the high/low temperature damp heat box of temperature 30 ± 5 DEG C, humidity 40 ± 2RH, after making the moisture absorption of sample surfaces salt particle nature, namely form aerosol droplets.
3. the test method that deposits at sample surfaces of Simulated gas colloidal sol according to claim 2, it is characterized in that: step (2) is sprayed in sample, by control spray gun bore, spout air pressure, spray gun walking speed and shower nozzle and sample surfaces vertical range come particle diameter and the deposition of Quality control surface deposition salt particle.
4. the test method that the Simulated gas colloidal sol according to Claims 2 or 3 deposits at sample surfaces, it is characterized in that: step (2) is sprayed in sample, spray gun bore is 0.3 ~ 0.5mm, spray gun walking speed is 20 ~ 30cm/s, and gun slot is 20 ± 2cm to the distance of sample surfaces; Spout pressure is 0.5 ~ 1.0MPa.
5. the test method that deposits at sample surfaces of Simulated gas colloidal sol according to claim 4, is characterized in that: the particle diameter of sample surfaces deposition salt particle is at 1 ~ 60 μm.
6. the test method that deposits at sample surfaces of Simulated gas colloidal sol according to claim 2, it is characterized in that: step (2) is sprayed in sample, spray gun does at the uniform velocity to-and-fro movement along sample surfaces center line, is controlled in the deposition of the gasoloid crystal grain of sample surfaces and deposited particles size by reciprocating number of times.
7. the test method that deposits at sample surfaces of Simulated gas colloidal sol according to claim 6, it is characterized in that: when spray gun does at the uniform velocity to-and-fro movement along sample surfaces center line, the distance that spray gun exceeds sample left and right edges is 5 ± 2cm.
8. the test method that deposits at sample surfaces of Simulated gas colloidal sol according to claim 2, is characterized in that: the diameter of the aerosol droplets formed at sample surfaces is 1 ~ 60 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610021923.4A CN105466823A (en) | 2016-01-14 | 2016-01-14 | Test method for simulating deposition of aerosol on surface of sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610021923.4A CN105466823A (en) | 2016-01-14 | 2016-01-14 | Test method for simulating deposition of aerosol on surface of sample |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105466823A true CN105466823A (en) | 2016-04-06 |
Family
ID=55604761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610021923.4A Pending CN105466823A (en) | 2016-01-14 | 2016-01-14 | Test method for simulating deposition of aerosol on surface of sample |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105466823A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106268545A (en) * | 2016-07-29 | 2017-01-04 | 中国科学院金属研究所 | A kind of produce polydispersion small particle aerosol and the method for grain diameter measurement thereof |
| CN110177476A (en) * | 2016-11-18 | 2019-08-27 | 莱战略控股公司 | Humidity inductive for aerosol delivery equipment |
| CN110718309A (en) * | 2019-11-15 | 2020-01-21 | 中国原子能科学研究院 | Aerosol deposition transfer device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036455A (en) * | 1988-09-24 | 1989-10-18 | 中国预防医学科学院环境卫生与卫生工程研究所 | Big extra small single particle genetic method of flow and device |
| DE10239767A1 (en) * | 2002-08-29 | 2004-03-18 | Inamed Gmbh | Apparatus to analyze particle behavior in an aerosol has a camera to take images of particles in a drop tube, at known intervals, to measure sedimentation speeds |
| CN102072861A (en) * | 2009-11-20 | 2011-05-25 | 苏州华达仪器设备有限公司 | Aerosol generator |
| CN102069046A (en) * | 2009-11-20 | 2011-05-25 | 苏州华达仪器设备有限公司 | Aerosol generator |
| CN103969173A (en) * | 2013-02-05 | 2014-08-06 | 中国科学院金属研究所 | Test method for simulating corrosion process of aluminum alloy in salt-rich salt lake in atmospheric environment |
| CN104297145A (en) * | 2013-07-16 | 2015-01-21 | 中国科学院金属研究所 | Electrochemical test method for researching influence of aerosol on atmosphere corrosion of metal material |
-
2016
- 2016-01-14 CN CN201610021923.4A patent/CN105466823A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036455A (en) * | 1988-09-24 | 1989-10-18 | 中国预防医学科学院环境卫生与卫生工程研究所 | Big extra small single particle genetic method of flow and device |
| DE10239767A1 (en) * | 2002-08-29 | 2004-03-18 | Inamed Gmbh | Apparatus to analyze particle behavior in an aerosol has a camera to take images of particles in a drop tube, at known intervals, to measure sedimentation speeds |
| CN102072861A (en) * | 2009-11-20 | 2011-05-25 | 苏州华达仪器设备有限公司 | Aerosol generator |
| CN102069046A (en) * | 2009-11-20 | 2011-05-25 | 苏州华达仪器设备有限公司 | Aerosol generator |
| CN103969173A (en) * | 2013-02-05 | 2014-08-06 | 中国科学院金属研究所 | Test method for simulating corrosion process of aluminum alloy in salt-rich salt lake in atmospheric environment |
| CN104297145A (en) * | 2013-07-16 | 2015-01-21 | 中国科学院金属研究所 | Electrochemical test method for researching influence of aerosol on atmosphere corrosion of metal material |
Non-Patent Citations (5)
| Title |
|---|
| 屈庆等: "NaCl和SO2在A3钢初期大气腐蚀中的协同效应", 《金属学报》 * |
| 屈庆等: "Zn初期大气腐蚀中NaCl和SO2的协同效应", 《中国有色金属学报》 * |
| 张丹丹 等: "Q345 钢在模拟酸性海洋气溶胶环境下的大气腐蚀行为", 《中国腐蚀与防护学报》 * |
| 曹岩 等: "不锈钢在红沿河大气环境下初期腐蚀行为", 《全面腐蚀控制》 * |
| 王秀通等: "SO2和NaCl对铜大气腐蚀的影响", 《材料保护》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106268545A (en) * | 2016-07-29 | 2017-01-04 | 中国科学院金属研究所 | A kind of produce polydispersion small particle aerosol and the method for grain diameter measurement thereof |
| CN106268545B (en) * | 2016-07-29 | 2019-02-12 | 中国科学院金属研究所 | A method of generating polydispersion small particle aerosol and its grain diameter measurement |
| CN110177476A (en) * | 2016-11-18 | 2019-08-27 | 莱战略控股公司 | Humidity inductive for aerosol delivery equipment |
| CN110177476B (en) * | 2016-11-18 | 2022-10-21 | 莱战略控股公司 | Humidity sensing for aerosol delivery devices |
| CN110718309A (en) * | 2019-11-15 | 2020-01-21 | 中国原子能科学研究院 | Aerosol deposition transfer device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105466823A (en) | Test method for simulating deposition of aerosol on surface of sample | |
| Damak et al. | Enhancing droplet deposition through in-situ precipitation | |
| US10364184B2 (en) | Manufacturing method of big-model low-permeability microcrack core | |
| Ye et al. | Numerical and experimental study of spray coating using air-assisted high-pressure atomizers | |
| Hoffman et al. | Controlling droplet deposition with surfactants | |
| CN204389359U (en) | The simulated acceleration test apparatus that a kind of acid marine aerosol affects steel atmospheric corrosion | |
| Peruchi et al. | Development of a water-based acrylic paint with resistance to efflorescence and test method to determine the appearance of stains | |
| US20120304671A1 (en) | Mixed-phase generator and use thereof | |
| Goldenfeld et al. | Dynamics of precipitation pattern formation at geothermal hot springs | |
| CN103923721B (en) | Fluoride solidifying agent for treating fluorine pollution caused by burning coal and preparation method and application method thereof | |
| Pia et al. | Pore size distribution influence on suction properties of calcareous stones in cultural heritage: experimental data and model predictions | |
| Fesal et al. | A numerical analysis of flat fan aerial crop spray | |
| Nakagawa et al. | Modelling reactive solute transport from groundwater to soil surface under evaporation | |
| CN108298847A (en) | The method of biological ammonium magnesium phosphate cement consolidation Desert Sand and the performance test methods for the biological sandstone being formed by curing | |
| Bader et al. | Effect of substrate moisture on the weatherability of surface treatment for High-Performance Concrete (HPC) | |
| US20180355241A1 (en) | Dust free inorganic particles and method of making same | |
| CN105445172A (en) | Method for testing surface corrosion of aluminum alloy under adsorption of multiple solid particles | |
| Magaritz et al. | Effects of stratocumulus clouds on aerosols in the maritime boundary layer | |
| Merillou et al. | Simulating atmospheric pollution weathering on buildings | |
| Verkouteren et al. | Ink jet metrology: new developments at NIST to produce test materials for security applications | |
| Antonov et al. | Numerical simulation of entrainment of water fragments from the zone of localization of combustion and pyrolysis of forest fuel materials by air flow | |
| CN115960538A (en) | Fluorocarbon resin-based protective coating for protecting bronze ware and preparation method thereof | |
| Oshima et al. | Numerical and Experimental Study on Liquid Sheet Deformation by Air Flow | |
| CN110895217B (en) | Method for making spots on surface of saturated rock test piece applied to digital speckles | |
| Michelle | 2-D Modeling of Droplet Spreading Behavior on Surface of Urea using Fluent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160406 |
|
| RJ01 | Rejection of invention patent application after publication |