CN114076730A - Method for compiling environment spectrum of electric cabinet coating in dynamic natural environment - Google Patents
Method for compiling environment spectrum of electric cabinet coating in dynamic natural environment Download PDFInfo
- Publication number
- CN114076730A CN114076730A CN202010807010.1A CN202010807010A CN114076730A CN 114076730 A CN114076730 A CN 114076730A CN 202010807010 A CN202010807010 A CN 202010807010A CN 114076730 A CN114076730 A CN 114076730A
- Authority
- CN
- China
- Prior art keywords
- test
- spectrum
- coating
- time
- electrical cabinet
- 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.)
- Granted
Links
Images
Classifications
-
- 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
- G01N17/004—Investigating resistance of materials to the weather, to corrosion, or to light to light
-
- 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
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental & Geological Engineering (AREA)
- Environmental Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses an environmental spectrum compiling method of an electrical cabinet coating in a dynamic natural environment, which comprises the following steps: 1) obtaining key factors of corrosion of a subway electrical cabinet coating product in a target area and determining that the electrical cabinet coating product undergoes a cyclic process along with the operation of a subway; 2) carrying out statistical analysis on atmospheric environment data of a target area to obtain an atmospheric environment spectrum of the target area, wherein the atmospheric environment spectrum comprises an atmospheric environment spectrum in a daytime overhead operation stage and an environmental spectrum in a night storage stage; 3) and respectively designing one or more of an ultraviolet spectrum, an aging spectrum, a corrosion spectrum, a cleaning spectrum and a parking spectrum to determine a dynamic environment spectrum. The method provided by the invention truly reflects the practical situations that the coating of the subway electrical cabinet is subjected to sand erosion, dry-wet alternation, salt mist erosion, cleaning intervention pollution and the like in a service environment, and greatly improves the accuracy, rapidity and reliability of the evaluation of the service life of the coating under the multi-factor coupling simulation effect of a laboratory.
Description
Technical Field
The invention relates to the field of environment spectrum compilation of transportation vehicles, in particular to an environment spectrum compilation method of an electrical cabinet coating in a dynamic natural environment.
Background
The subway is the most extensive vehicle in urban rail transit, and different from a ground vehicle, the subway needs to go through various environments such as ground, platform and underground tunnel during operation. The subway electrical cabinet coating product can be influenced by atmospheric temperature, humidity, pollutants, ultraviolet irradiation and sand erosion on the ground; when the platform stays, the humidity of the platform environment is maintained between 60 and 65 percent due to the influence of a ventilation system, and the coating is hardly corroded; in the underground tunnel, the tunnel is corroded by the atmospheric environment, and the corrosion condition is serious because the atmospheric temperature and the humidity in the tunnel are slightly higher than the external atmospheric environment. Because the natural environment exposure test time is long, a method for meeting the requirement of an accelerated corrosion test of the coating environment spectrum of the electric cabinet of the metro in the urban rail transit needs to be established, and the corrosion behavior and the service life evaluation of the material in a long period are predicted from the short-period accelerated corrosion test result.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the technical problems in the prior art, the invention provides the environmental spectrum compilation method of the electric cabinet coating in the dynamic natural environment, which has high truth and can quickly and accurately evaluate the coating product.
In order to solve the technical problems, the invention adopts the technical scheme that:
an environmental spectrum compiling method of an electrical cabinet coating in a dynamic natural environment comprises the following steps:
1) obtaining key factors of corrosion of a subway electrical cabinet coating product in a target area and determining that the electrical cabinet coating product undergoes a cyclic process along with the operation of a subway;
2) carrying out statistical analysis on atmospheric environment data of a target area to obtain an atmospheric environment spectrum of the target area, wherein the atmospheric environment spectrum comprises an atmospheric environment spectrum in a daytime overhead operation stage and an environmental spectrum in a night storage stage;
3) and respectively designing one or more of an ultraviolet spectrum, an aging spectrum, a corrosion spectrum, a cleaning spectrum and a parking spectrum to determine a dynamic environment spectrum.
Preferably, the specific process of step 3) is as follows:
3.1) designing an ultraviolet/aging spectrum;
3.2) designing a corrosion spectrum;
3.3) determining sand dust test parameters and cleaning test parameters;
3.4) determining the dynamic environment spectrum.
Preferably, the specific process of step 3.1) is:
in the indoor accelerated test, the simulation of the ultraviolet irradiation time of one-year period depends on the ultraviolet radiation intensity on the surface of a test piece in an ultraviolet test box and the ultraviolet radiation amount of an actual sample which is exposed to 1 year under the real outdoor condition; when the ultraviolet radiation intensity irradiated on the surface of the sample in the ultraviolet test box is W, and the annual ultraviolet radiation amount of the real environment of the external field is Q, the ultraviolet irradiation time required for each acceleration period can be expressed as:
it is thus possible to calculate the time for which the coating is exposed to the sun outdoors for one year corresponds to a test for accelerated ageing indoors.
Preferably, the specific process of step 3.2) is:
3.2.1) determining the action time of standard humid air;
3.2.2) selecting a test method and a test solution to carry out equivalent conversion;
3.3.3) determining the total test time and the test time of each module in the environment spectrum acceleration test method.
Preferably, the specific process of step 3.2.1) is:
converting atmospheric environment data of the subway electrical cabinet coating product in different environments into standard humid air action time with RH being 90% and T being 40 ℃ to obtain the whole-year standard humid air action time T of the subway in the target areaGeneral assembly＝tWhite colour (Bai)+tTunnel+tNight(ii) a Wherein t isWhite colour (Bai)、tTunnel、tNightAnd respectively representing the standard humid air action time of the daytime ground operation stage, the standard humid air action time of the daytime underground tunnel operation stage and the standard humid air action time of the night warehousing stage.
Preferably, the specific process of step 3.2.2) is: selecting different tests including a salt spray test, a damp-heat test and a drying test by combining the subway operation condition and the atmospheric environment spectrum of the target area; the test solutions and the acceleration rates of the respective solutions were selected.
Preferably, the specific process of step 3.2.3) is: setting the total test time as N calendar cycles, and equivalent outdoor exposure corrosion amount for one year; determining the drying test time t in each calendar cycleDry matterTo ensure the coating to be completely dried; determining the damp heat test time per calendar cycle as tWetThen the total damp-heat time is NxtWet(ii) a The residual standard humid air action time is tGeneral assembly-N×tWetIn each calendar cycle, the salt spray time is (t)General assembly-N×tWet)/N/(1/Km1+1/Kn1+1/KfW) (ii) a The corrosion spectrum of the stainless steel coating system thus obtained is: salt spray test: (t)General assembly-N×tWet)/N/(1/Km1+1/Kn1+1/KfW)，m1％NaCl+n1％Na2SO4pH a, test temperature TSalt (salt)The mixed solution of (a) is used as a salt spray test solution; drying test: drying test time tDry matterThe test condition is that the humidity is less than or equal to RHDry matterTemperature TDry matter(ii) a And (3) a damp-heat test: test time tWetThe damp-heat test condition is RHWetAt a temperature ofTWet；。
Preferably, in step 3.3), the dust test time is determined to be T according to GB/T2423.37SandThe test dust adopts talcum powder fine dust, the particle size is less than or equal to s, and the concentration of the dust is c; the air flow speed is v, and the humidity in the test chamber is RHSandAt a temperature of TSand(ii) a Respectively adopting stock solution and dilution n1Doubling and diluting n2The washing time of each concentration gradient is tWashing machineTotal cleaning time period tWashing assembly＝3tWashing machineAnd the stock solution is the cleaning solution actually required by subway operation.
Preferably, in step 3.4), after the ultraviolet test, the salt spray test, the drying test and the wet heat test are performed for N calendar cycle times, the sand dust test and the cleaning test are performed, so that the corrosion/aging amount of the coating product of the electrical cabinet, which is equivalent to one year of outdoor exposure, is obtained.
Preferably, in step 1), the key factors include one or more of damp heat, salt spray, uv, dry, sand dust.
Compared with the prior art, the invention has the advantages that:
(1) the invention simulates environmental elements which play a leading role in the coating of the electrical cabinet of the high-speed train in the actual environment by analysis and statistics: the environment spectrum is compiled by temperature, humidity, pH, acid mist, illumination, atmospheric particulates and corrosive ingredients in the atmosphere, the composition, parameter magnitude and action time of each action module of a simulation acceleration test are designed based on the environment spectrum equivalent transformation principle, equivalent simulation of main factors and action sequence is guaranteed, the practical situations that the coating of the subway electric cabinet is subjected to sand erosion, dry-wet alternation, salt mist erosion, cleaning intervention pollution and the like in a service environment are truly reflected, and the accuracy, rapidity and reliability of the evaluation of the service life of the coating under the multi-factor coupling effect of laboratory simulation are greatly improved.
(2) The method establishes the simulated acceleration test environment spectrum according to the natural environment spectrum equivalent transformation of the actual use environment, improves the designability and the applicability of the coating simulated acceleration test, and can be popularized and applied to other environment simulated acceleration test designs.
(3) Compared with the natural environment atmospheric exposure test, the simulation acceleration test has the advantages that the acceleration rate is gradually increased, 365 days of service in the natural environment is equivalent to N calendar cycle times under the laboratory condition, and the acceleration is obvious.
(4) The invention finely divides different electrical cabinet coating materials and different operation environments of the subway, and can accurately and quickly evaluate the service life of the subway electrical cabinet coating product.
Drawings
FIG. 1 is a flow chart of an embodiment of the method of the present invention.
FIG. 2 is a dynamic environmental spectrum of a stainless steel coating of the present invention in a target area operating environment.
Detailed Description
The invention is further described below with reference to the figures and the specific embodiments of the description.
As shown in fig. 1, the method for compiling an environment spectrum of an electrical cabinet coating in a dynamic natural environment according to this embodiment is suitable for urban rail transit vehicles (such as subways), and specifically includes the steps of:
1) carrying out investigation and analysis on the operating condition environment of a W (e.g. Wuhan) subway of an industrial city, and determining that the key factors of corrosion of the coating product of the W subway and the electrical cabinet of the industrial city are damp heat, salt mist, ultraviolet, dryness and sand dust; determining the circulation process of 'in underground tunnel → underground platform → ground elevated frame → night warehousing' of the coating product of the electric cabinet along with the operation of the subway;
2) counting the atmospheric environment data of the W area of the industrial city to obtain an atmospheric environment spectrum of the industrial city, wherein the atmospheric environment spectrum comprises an atmospheric environment spectrum in a daytime overhead operation stage and an environmental spectrum in a night storage stage;
3) and (4) counting environmental data and operation conditions of a reference city, respectively calculating the equivalent weight of the ultraviolet/aging spectrum, the corrosion spectrum and the sand-dust spectrum, and determining a dynamic environment spectrum.
In this embodiment, the specific process of step 3) is as follows:
3.1) designing an ultraviolet/aging spectrum;
3.2) designing a corrosion spectrum;
3.3) determining sand dust test parameters and cleaning test parameters;
3.4) determining the dynamic environment spectrum.
In this embodiment, the process of designing the ultraviolet/aging spectrum in step 3.1) is as follows: in the indoor accelerated test, the simulated one-year cycle uv irradiation time depends on the uv radiation intensity on the test piece surface in the uv test chamber and the uv radiation amount that the actual sample is exposed to for 1 year in the outdoor real condition. When the ultraviolet radiation intensity irradiated on the surface of the sample in the ultraviolet test box is W, and the annual ultraviolet radiation amount of the real environment of the external field is Q, the ultraviolet irradiation time required for each acceleration period can be expressed as:
it is thus possible to calculate the time for which the coating is exposed to the sun outdoors for one year corresponds to a test for accelerated ageing indoors.
In this embodiment, the process of designing the corrosion spectrum in step 3.2) is as follows: the corrosion electric quantity is equal to the equivalent criterion of the corrosion spectrum design, and as the external environment is variable, the corrosion of the coating in the process of running with the subway is strong and weak, the corrosion current I also changes with the time and the environment, and for the same electrical cabinet component, the specific time t is1To t2Over time, the corrosion charge Q may be expressed as an integral:
wherein F is the Faraday constant, t1，t2Respectively, the starting time and the ending time, and Q is electric quantity.
Under accelerated laboratory conditions, for the same metal or component, from a selected test spectrum, the corrosion current density I' of the same is determined at a specific time t1To t2In the 'context, the corrosion charge Q' of a metal can be expressed in integrated form:
according to the principle of equivalent of corrosion electric quantity, Q is known to be Q ', and in practical engineering application, I and I' can be reasonably discussed as constants and set
t＝t2-t1，t'＝t'2-t'1Then, there are: t' ═ α t, the test time was shortened to α times after conversion, and the purpose of accelerating the indoor corrosion time to 1/α times in the actual environment was achieved (α ≦ 1).
In this embodiment, the sand-dust spectrum design process in step 3.3) is as follows: when a subway exists on a ground running road section (such as an overhead line), raised dust and air particles are attached to the coating of the electric cabinet, and a sand dust spectrum needs to be added. The test parameters of the sand-dust spectrum can be determined according to the working condition environment of the subway and the actual attachments on the surface of the electric cabinet.
The design method for obtaining the environmental spectrum by the method comprises the following steps:
1. external irradiation test: the ultraviolet irradiation time is tPurple pigmentUltraviolet irradiation intensity of W and test temperature of TPurple pigment；
2. Salt spray test: industrial city W developed in heavy industry, SO2Relatively high in concentration and in inland regions. Therefore, m 1% NaCl + n 1% Na is selected2SO4pH a, test temperature TSalt (salt)The mixed solution of (a) is used as a salt spray test solution;
3. drying test: drying test time tDry matterThe test condition is that the humidity is less than or equal to RHDry matter，TDry matter；
4. Thermal test: test time tWetThe damp-heat test condition is RHWetAt a temperature of TWet；
5. Sand dust test: test time tSandThe test dust adopts talcum powder fine dust, the particle size is less than or equal to s, and the concentration of the dust is c; the air flow speed is v, and the humidity in the test chamber is RHSandAt a temperature of TSand；
6. Cleaning ofAnd (3) testing: the cleaning solution adopts three concentration gradients of stock solution, diluted n1 times and diluted n2 times, and is cleaned from concentrated to diluted, and the cleaning time of each concentration gradient is tWashing machineTotal cleaning time period tWashing assembly(ii) a Wherein the stock solution is a cleaning solution actually required by subway operation;
after the tests 1-4 are sequentially cycled for N times, a test 5 and a test 6 are carried out, namely the corrosion/aging amount of the coating of the subway electrical cabinet in the industrial city W operation environment for one year is simulated.
The invention finely divides different electrical cabinet coating materials and different operation environments of the subway, and can accurately and quickly evaluate the service life of the subway electrical cabinet coating product.
The invention will be further described with reference to the accompanying drawings in which:
1. according to the working condition investigation result of the W subway of the industrial city, determining that the key factors of the corrosion of the coating product of the electrical cabinet of the W subway of the industrial city are damp heat, salt spray, ultraviolet, dry and sand dust, and determining that the coating product of the electrical cabinet runs along with the subway and goes through a cyclic process of 'ground → platform → underground tunnel → overhead → night warehousing';
2. selecting an X line with the severest operating environment of a W subway of an industrial city as a representative line, dividing the subway state into a daytime operation mode and a nighttime storage parking mode, analyzing the vehicle operating time and environmental characteristics, wherein the daytime operating time is A:00-B:00, and the rest time is a nighttime storage stage. Wherein the overhead ground operation accounts for β% of the total daytime operation time, and the atmospheric environmental spectra are shown in tables 1 and 2.
Table 1 atmospheric environmental data of W subway overhead operation stage in industrial city
Table 2 atmospheric environmental data at night storage stage of W subway of industrial city
3. Ambient spectral equivalent calculation
(1) Uv/aging spectrum: taking an X number line of a W subway of an industrial city as a reference line, wherein the total running time of each subway on the X number line is TGeneral assemblyWherein the underground tunnel time is TTunnelX number lines total N0A station with a dwell time of about TStaySo that the station residence time is N in total0×TStayAnd the ground overhead operation time is TElevated frameAlpha of total operating timePurple pigmentTherefore, the method can be regarded as alpha of the time of exposure of the subway to the sunlight in the operation stage accounting for the total operation time of the day1. The electrical cabinet coating product is arranged at the bottom of a subway carriage, so that the electrical cabinet coating product cannot be directly irradiated by sunlight, similar to the condition of a lower covering of a wing of a military aircraft, and the indoor ultraviolet irradiation is known to be carried out for 24 hours and is known to expose N outdoors in W of an industrial city by the military aircraft1The degree of day aging was comparable. According to the Chinese solar radiation distribution diagram, the industrial city W is located at (W)Lower part-WOn the upper part)MJ/m2The position close to the lower limit in the interval is known under harsh conditions, and the indoor ultraviolet irradiation time for simulating outdoor exposure of the coating of the W subway electrical cabinet of the industrial city for one year is tPurple pigment＝(WOn the upper part/WLower part)×(N1×αPurple pigment)/(N0/24) ultraviolet irradiation conditions are that the irradiation intensity is WPurple pigmentAt a temperature of TPurple pigment。
(2) Corrosion spectrum: according to the principle that the corrosion electric quantity is equal, atmospheric environment temperature and humidity data need to be converted into standard humid air action time of a selected material, the materials related to the invention are a carbon steel coating system, a stainless steel coating system and an aluminum alloy coating system, the corrosion speeds of different materials are different, therefore, under the same environment, the standard humid air action time calculated by the atmospheric environment data equivalent is different, and the calculation is carried out by taking the stainless steel coating system as an example:
standard humid air action time: atmospheric environment data of a subway electrical cabinet coating product in different environments are converted into standard humid air action time with RH being 90% and T being 40 ℃, and a stainless steel substrate standard humid air action time conversion coefficient obtained according to a corrosion electric quantity equality criterion is given in table 3:
table 3: stainless steel base material standard humid air action time conversion coefficient table
Therefore, the action time t of the standard humid air of the whole year of the W subway of the industrial city can be obtainedGeneral assembly，tWhite colour (Bai)、tTunnel、tNightRespectively representing the standard humid air action time of the ground operation stage in the daytime, the standard humid air action time of the underground tunnel operation stage in the daytime and the standard humid air action time of the warehouse-in stage at night, namely
tWhite colour (Bai)＝(AHeight of×α11+BHeight of×α21+CHeight of×α31+DHeight of×α12+EHeight of×α22+FHeight of×α32+GHeight of×α13+HHeight of×α23+IHeight of×α33)+(t11×α31+t12×α32+t13×α33+t14×α34)
Statistics shows that the atmospheric temperature and humidity in the underground tunnel are slightly higher than the ground in summer, and by combining with W atmospheric environment data of industrial cities, the atmospheric temperature in the underground tunnel is maintained at 25-29 ℃ and the atmospheric relative humidity is maintained at 80-89% during 5-9 months, the underground tunnel is corroded when in operation, the atmospheric humidity in the underground tunnel is lower than 70% in the rest time, the underground tunnel can be regarded as dry atmosphere and is extremely slightly corroded, meanwhile, the operation time of the underground tunnel accounts for gamma% of the total operation time, and therefore the dry atmosphere can be obtained
tTunnel＝153×17×16.7％×0.1613＝70.1h
tNight＝ANight×α11+BNight×α21+CNight×α31+DNight×α12+ENight×α22+FNight×α32+GNight×α13+HNight×α23+INight×α33
Therefore, the action time t of the annual standard humid air of the coating of the subway electric cabinet in the Wuhan running environment is obtainedGeneral assembly＝tWhite colour (Bai)+tTunnel+tNight。
Selecting a test method and a test solution to carry out equivalent conversion: and selecting a salt spray test, a damp-heat test and a drying test as test methods by combining the subway operation condition and the W atmospheric environment spectrum of the industrial city. Industrial city W developed in heavy industry, SO2Relatively high in concentration and in inland regions. Therefore, m 1% NaCl + n 1% Na is selected2SO4The pH is a, the mixed solution of the test temperature tsalt is used as the salt spray test solution, and the acceleration rate of the salt spray test is calculated, and tables 4, 5 and 6 show the concentrations of NaCl and H of the stainless steel substrate2SO4And Na2SO4The conversion factor in solution with respect to pure water.
Table 4: conversion coefficient of pure water medium of stainless steel substrate to NaCl solutions with different concentrations
Table 5: pure water medium for different concentrations of H in stainless steel substrate2SO4Conversion coefficient of
Table 6: pure water medium for different concentrations of Na for stainless steel base material2SO4Conversion factor of solution
m1Acceleration rate of% NaCl solution is 1/Km1，n1％Na2SO4The acceleration rate of the solution is 1/Kn1。
pH of a [ H +]Acceleration magnification of (2): h at pH a2SO4The concentration of hydrogen ions in the solution is fNorth China＝H2SO4Molar concentration XH2SO4Molecular weight X10-aThe pH a H was obtained by interpolation according to Table 52SO4The corresponding conversion coefficient of the concentration of hydrogen ions in the solution is KfWI.e. acceleration magnification of 1/KfW。
Thus, use m1％NaCl+n1％Na2SO4The total acceleration rate of the mixed solution with pH being a is 1/Km1+1/Kn1+1/KfWThat is to say that the action of the stainless steel coating system in the salt spray test for 1 hour corresponds to the action of standard moist air 1/Km1+1/Kn1+1/KfWAnd (4) hours.
Determining the total test time and the test time of each module in the environment spectrum acceleration test method: setting the total test time as N calendar cycles, and equivalent outdoor exposure corrosion amount for one year; determining the drying test time t in each calendar cycleDry matterTo ensure the coating to be completely dried; determining the damp heat test time per calendar cycle as tWetThen the total damp-heat time is NxtWet(ii) a The residual standard humid air action time is tGeneral assembly-N×tWetIn each calendar cycle, the salt spray time is (t)General assembly-N×tWet)/N/(1/Km1+1/Kn1+1/KfW)
Thus, a stainless steel coating system corrosion spectrum was obtained:
salt spray test: (t)General assembly-N×tWet)/N/(1/Km1+1/Kn1+1/KfW)，m1％NaCl+n1％Na2SO4pH a, test temperature TSalt (salt)The mixed solution of (3) was used as a salt spray test solution.
Drying test: drying test time tDry matterThe test condition is that the humidity is less than or equal to RHDry matterTemperature TDry matter；
And (3) a damp-heat test: test time tWetThe damp-heat test conditions areRHWetAt a temperature of TWet。
(3) Determining sand dust test parameters and cleaning test parameters: because the electrical cabinet body is externally provided with the shielding function of the protective cover, and fine raised dust is adhered to the cabinet body material when the subway runs on the ground, the sand dust test time is determined to be T according to GB/T2423.37SandThe test dust adopts talcum powder fine dust, the particle size is less than or equal to s, and the concentration of the dust is c; the air flow speed is v, and the humidity in the test chamber is RHSandAt a temperature of TSand. When the electric cabinet body is cleaned, only a small amount of cleaning liquid can pass through the protective cover and splash on the electric cabinet material, so that the stock solution and the dilution n are respectively adopted1Doubling and diluting n2The washing time of each concentration gradient is tWashing machineTotal cleaning time period tWashing assembly＝3tWashing machineAnd the stock solution is the cleaning solution actually required by subway operation.
(4) Determining a dynamic environment spectrum: in the operation process of the electrical cabinet coating product along with the subway, due to the shielding effect of the protective cover, the influence of sand dust and cleaning liquid is small, the corrosion/aging influence of the ultraviolet intensity, the atmospheric temperature, the atmospheric humidity and the coating internal stress caused by the alternation of cold and heat on the coating is large, after N calendar cycle times of an ultraviolet test, a salt spray test, a drying test and a damp-heat test are carried out, the sand dust test and the cleaning test are carried out, and the corrosion/aging amount of the electrical cabinet coating product is equivalent to the outdoor corrosion/aging amount exposed for one year.
The invention discloses a dynamic environment spectrum design method of an urban rail transit subway electric cabinet coating, which meets the environment spectrum accelerated corrosion test method of an urban rail transit subway electric cabinet coating product in the running environment of the Wuhan region, and simulates environmental elements which play a leading role in the high-speed train electric cabinet coating in the actual environment through analysis and statistics: the environment spectrum is compiled by temperature, humidity, pH, acid mist, illumination, atmospheric particulates and corrosive ingredients in the atmosphere, the composition, parameter magnitude and action time of each action module of a simulation acceleration test are designed based on the environment spectrum equivalent transformation principle, equivalent simulation of main factors and action sequence is guaranteed, the practical situations that the coating of the subway electric cabinet is subjected to sand erosion, dry-wet alternation, salt mist erosion, cleaning intervention pollution and the like in a service environment are truly reflected, and the accuracy, rapidity and reliability of the evaluation of the service life of the coating under the multi-factor coupling effect of laboratory simulation are greatly improved.
The method establishes the simulated acceleration test environment spectrum according to the natural environment spectrum equivalent transformation of the actual use environment, improves the designability and the applicability of the coating simulated acceleration test, and can be popularized and applied to other environment simulated acceleration test designs.
Compared with the natural environment atmospheric exposure test, the simulation acceleration test has the advantages that the acceleration rate is gradually increased, 365 days of service in the natural environment is equivalent to N calendar cycle times under the laboratory condition, and the acceleration is obvious.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.
Claims (10)
1. An environmental spectrum compiling method of an electrical cabinet coating in a dynamic natural environment is characterized by comprising the following steps:
1) obtaining key factors of corrosion of a subway electrical cabinet coating product in a target area and determining that the electrical cabinet coating product undergoes a cyclic process along with the operation of a subway;
2) carrying out statistical analysis on atmospheric environment data of a target area to obtain an atmospheric environment spectrum of the target area, wherein the atmospheric environment spectrum comprises an atmospheric environment spectrum in a daytime overhead operation stage and an environmental spectrum in a night storage stage;
3) and respectively designing one or more of an ultraviolet spectrum, an aging spectrum, a corrosion spectrum, a cleaning spectrum, a parking spectrum and a sand-dust spectrum, and combining to form a dynamic environment spectrum.
2. The method for compiling the environmental spectrum of the coating of the electrical cabinet in the dynamic natural environment according to claim 1, wherein the specific process of the step 3) is as follows:
3.1) designing an ultraviolet/aging spectrum;
3.2) designing a corrosion spectrum;
3.3) determining sand dust test parameters and cleaning test parameters;
3.4) determining the dynamic environment spectrum.
3. The method for compiling the environmental spectrum of the coating of the electrical cabinet in the dynamic natural environment according to claim 2, wherein the specific process of the step 3.1) is as follows:
in the indoor accelerated test, the simulation of the ultraviolet irradiation time of one-year period depends on the ultraviolet radiation intensity on the surface of a test piece in an ultraviolet test box and the ultraviolet radiation amount of an actual sample which is exposed to 1 year under the real outdoor condition; when the ultraviolet radiation intensity irradiated on the surface of the sample in the ultraviolet test box is W, and the annual ultraviolet radiation amount of the real environment of the external field is Q, the ultraviolet irradiation time required for each acceleration period can be expressed as:
it is thus possible to calculate the time for which the coating is exposed to the sun outdoors for one year corresponds to a test for accelerated ageing indoors.
4. The method for compiling the environmental spectrum of the coating of the electrical cabinet in the dynamic natural environment according to claim 3, wherein the specific process of the step 3.2) is as follows:
3.2.1) determining the action time of standard humid air;
3.2.2) selecting a test method and a test solution to carry out equivalent conversion;
3.3.3) determining the total test time and the test time of each module in the environment spectrum acceleration test method.
5. The method for compiling the environmental spectrum of the coating of the electrical cabinet in the dynamic natural environment according to claim 4, wherein the specific process of the step 3.2.1) is as follows:
converting atmospheric environment data of the subway electrical cabinet coating product in different environments into standard humid air action time with RH being 90% and T being 40 ℃ to obtain the whole-year standard humid air action time T of the subway in the target areaGeneral assembly＝tWhite colour (Bai)+tTunnel+tNight(ii) a Wherein t isWhite colour (Bai)、tTunnel、tNightAnd respectively representing the standard humid air action time of the daytime ground operation stage, the standard humid air action time of the daytime underground tunnel operation stage and the standard humid air action time of the night warehousing stage.
6. The method for compiling the environmental spectrum of the coating of the electrical cabinet in the dynamic natural environment according to claim 5, wherein the specific process of the step 3.2.2) is as follows: selecting different tests including a salt spray test, a damp-heat test and a drying test by combining the subway operation condition and the atmospheric environment spectrum of the target area; the test solutions and the acceleration rates of the respective solutions were selected.
7. The method for compiling the environmental spectrum of the coating of the electrical cabinet in the dynamic natural environment according to claim 6, wherein the specific process of the step 3.2.3) is as follows: setting the total test time as N calendar cycles, and equivalent outdoor exposure corrosion amount for one year; determining the drying test time t in each calendar cycleDry matterTo ensure the coating to be completely dried; determining the damp heat test time per calendar cycle as tWetThen the total damp-heat time is NxtWet(ii) a The residual standard humid air action time is tGeneral assembly-N×tWetIn each calendar cycle, the salt spray time is (t)General assembly-N×tWet)/N/(1/Km1+1/Kn1+1/KfW) (ii) a The corrosion spectrum of the stainless steel coating system thus obtained is: salt spray test: (t)General assembly-N×tWet)/N/(1/Km1+1/Kn1+1/KfW)，m1％NaCl+n1％Na2SO4pH a, test temperature TSalt (salt)The mixed solution of (a) is used as a salt spray test solution; drying test: drying test time tDry matterThe test condition is that the humidity is less than or equal to RHDry matterTemperature TDry matter(ii) a And (3) a damp-heat test: test time tWetThe damp-heat test condition is RHWetAt a temperature of TWet；。
8. The environment spectrum compilation method for the coating of the electrical cabinet in the dynamic natural environment according to any one of claims 2 to 7, characterized in that in step 3.3), the sand-dust test time is determined to be T according to GB/T2423.37SandThe test dust adopts talcum powder fine dust, the particle size is less than or equal to s, and the concentration of the dust is c; the air flow speed is v, and the humidity in the test chamber is RHSandAt a temperature of TSand(ii) a Respectively adopting stock solution and dilution n1Doubling and diluting n2The washing time of each concentration gradient is tWashing machineTotal cleaning time period tWashing assembly＝3tWashing machineAnd the stock solution is the cleaning solution actually required by subway operation.
9. The method for compiling the environmental spectrum of the coating of the electric cabinet in the dynamic natural environment according to any one of claims 2 to 7, wherein in the step 3.4), after an ultraviolet test, a salt spray test, a drying test and a damp-heat test are carried out for N calendar cycle times, a sand dust test and a cleaning test are carried out, and the corrosion/aging amount of the coating product of the electric cabinet is equivalent to that of outdoor exposure for one year.
10. The environmental spectrum compilation method for the coating of the electrical cabinet in the dynamic natural environment according to any one of claims 1 to 7, wherein in the step 1), the key factors comprise one or more of damp heat, salt spray, ultraviolet light, dryness and sand dust.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010807010.1A CN114076730B (en) | 2020-08-12 | 2020-08-12 | Environmental spectrum compiling method of electrical cabinet coating in dynamic natural environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010807010.1A CN114076730B (en) | 2020-08-12 | 2020-08-12 | Environmental spectrum compiling method of electrical cabinet coating in dynamic natural environment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114076730A true CN114076730A (en) | 2022-02-22 |
| CN114076730B CN114076730B (en) | 2023-08-01 |
Family
ID=80280055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010807010.1A Active CN114076730B (en) | 2020-08-12 | 2020-08-12 | Environmental spectrum compiling method of electrical cabinet coating in dynamic natural environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114076730B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117690528A (en) * | 2023-12-11 | 2024-03-12 | 西南财经大学 | Multi-factor coupling life prediction method based on distributed finite sample |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954550A (en) * | 2014-05-04 | 2014-07-30 | 中国兵器工业第五九研究所 | Marine atmosphere simulated accelerated testing method for coating |
| CN103995099A (en) * | 2014-04-17 | 2014-08-20 | 中国航空工业集团公司沈阳飞机设计研究所 | Method for determining equivalent relationship between artificial acceleration and in-service ageing of organic glass |
| CN106404646A (en) * | 2016-08-29 | 2017-02-15 | 中国航空工业集团公司西安飞机设计研究所 | Environmental spectrum acceleration equivalent determination method based on fatigue strength equivalence |
| CN107918683A (en) * | 2016-10-09 | 2018-04-17 | 中国人民解放军海军航空工程学院青岛校区 | A kind of preparation method of carrier-borne aircraft ground parking |
| CN110763614A (en) * | 2019-08-02 | 2020-02-07 | 北京福田戴姆勒汽车有限公司 | Accelerated test method for simulating atmospheric corrosion |
| CN110793908A (en) * | 2019-10-11 | 2020-02-14 | 中国直升机设计研究所 | Laboratory accelerated test method for shipborne helicopter coating under marine atmospheric condition |
-
2020
- 2020-08-12 CN CN202010807010.1A patent/CN114076730B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103995099A (en) * | 2014-04-17 | 2014-08-20 | 中国航空工业集团公司沈阳飞机设计研究所 | Method for determining equivalent relationship between artificial acceleration and in-service ageing of organic glass |
| CN103954550A (en) * | 2014-05-04 | 2014-07-30 | 中国兵器工业第五九研究所 | Marine atmosphere simulated accelerated testing method for coating |
| CN106404646A (en) * | 2016-08-29 | 2017-02-15 | 中国航空工业集团公司西安飞机设计研究所 | Environmental spectrum acceleration equivalent determination method based on fatigue strength equivalence |
| CN107918683A (en) * | 2016-10-09 | 2018-04-17 | 中国人民解放军海军航空工程学院青岛校区 | A kind of preparation method of carrier-borne aircraft ground parking |
| CN110763614A (en) * | 2019-08-02 | 2020-02-07 | 北京福田戴姆勒汽车有限公司 | Accelerated test method for simulating atmospheric corrosion |
| CN110793908A (en) * | 2019-10-11 | 2020-02-14 | 中国直升机设计研究所 | Laboratory accelerated test method for shipborne helicopter coating under marine atmospheric condition |
Non-Patent Citations (3)
| Title |
|---|
| 张保军 等: "装备车辆综合气候环境构建分析", 《环境技术》 * |
| 徐安桃 等: "车辆装备涂层加速试验环境谱研究", 《军事交通学院学报》 * |
| 王艳艳 等: "自然环境谱转化为加速试验环境谱的方法", 《装备环境工程》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117690528A (en) * | 2023-12-11 | 2024-03-12 | 西南财经大学 | Multi-factor coupling life prediction method based on distributed finite sample |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114076730B (en) | 2023-08-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Chen et al. | Relationship between atmospheric pollution processes and synoptic pressure patterns in northern China | |
| Niu et al. | PM2. 5 from the Guanzhong Plain: Chemical composition and implications for emission reductions | |
| Chaichan et al. | Effect of pollution and cleaning on photovoltaic performance based on experimental study | |
| Larson et al. | Characteristics of summer midday low-visibility events in the Los Angeles area | |
| Cao et al. | Current status, characteristics and causes of particulate air pollution in the Fenwei Plain, China: A review | |
| Rotach et al. | Pollutant dispersion close to an urban surface–the BUBBLE tracer experiment | |
| Engvall et al. | Changes in aerosol properties during spring-summer period in the Arctic troposphere | |
| Wei et al. | Impact of boundary-layer anticyclonic weather system on regional air quality | |
| Tiwari et al. | Assessments of PM1, PM2. 5 and PM10 concentrations in Delhi at different mean cycles | |
| Yang et al. | PLAM–a meteorological pollution index for air quality and its applications in fog-haze forecasts in North China | |
| Chen et al. | Simulation on different response characteristics of aerosol particle number concentration and mass concentration to emission changes over mainland China | |
| Hienola et al. | Black carbon concentration and deposition estimations in Finland by the regional aerosol–climate model REMO-HAM | |
| Gläser et al. | The Mineral Dust Cycle in EMAC 2.40: sensitivity to the spectral resolution and the dust emission scheme | |
| Gao et al. | Estimation of background concentration of PM in Beijing using a statistical integrated approach | |
| CN114076730A (en) | Method for compiling environment spectrum of electric cabinet coating in dynamic natural environment | |
| Zhao et al. | Aircraft-based observation of gaseous pollutants in the lower troposphere over the Beijing-Tianjin-Hebei region | |
| Tao et al. | Quantifying the relative contributions of aqueous phase and photochemical processes to water-soluble organic carbon formation in winter in a megacity of South China | |
| Xu et al. | Spatial structure and scale feature of the atmospheric pollution source impact of city agglomeration | |
| CN109918770B (en) | Artificial precipitation removal fine particle prediction model | |
| Bruse et al. | Practical and theoretical investigation of the influence of facade greening on the distribution of heavy metals in urban streets | |
| Weber et al. | Coupling of urban street canyon and backyard particle concentrations | |
| Fan et al. | Diagnostic analysis of the sulfate aerosol pollution in spring over Pearl River Delta, China | |
| Goswami et al. | Simulation of daily variation of suspended particulate matter over Delhi: relative roles of vehicular emission, dust, and domestic appliances | |
| Yang et al. | PLAM--a meteorological pollution index for air quality and its applications in fog-haze forecasts in north China. | |
| CN111382506A (en) | Method for evaluating influence of aerosol and radiation interaction on atomization effect |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |