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GB/T 1865-2009 English PDF (GBT1865-2009)

GB/T 1865-2009 English PDF (GBT1865-2009)

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GB/T 1865-2009: Paints and varnishes -- Artificial weathering and exposure to artificial radiation -- Exposure to filtered xenon-arc radiation

GB/T 1865-2009
Paints and varnishes.Artificial weathering and exposure to artificial radiation.Exposure to filtered xenon-arc radiation ICS 87.0040
G50
National Standards of People's Republic of China
GB/T 1865-2009/ISO 11341.2004
Replace GB/T 1865-1997
Paints and varnishes
Artificial weathering and artificial radiation exposure
Filtered xenon arc radiation
(ISO 11341.2004, IDT)
2009-06-02 released
2010-02-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Issued by China National Standardization Management Committee
Contents
Foreword Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 Principle 2
5 Supplementary information required 2
6 Instruments and equipment 2
7 Sampling 5
8 Preparation of test plates 5
9 Step 6
10 Evaluation of aging results 7
11 Test Report 7
Appendix A (Normative Appendix) Information to be added 9
Appendix B (informative appendix) Sunlight spectral irradiance and window glass light transmittance 10 Reference 12
GB/T 1865-2009/ISO 11341.2004
Foreword
This standard is equivalent to adopting the international standard ISO 11341.2004 "paints and varnishes --- artificial weathering and artificial radiation exposure (filtered Xenon arc radiation)" (English version).
This standard is equivalent to the translation of ISO 11341.2004.
For ease of use, the editorial changes of this standard are as follows. ---Replace "this international standard" with "this standard";
--- Delete the preface of international standards;
---For other international standards cited in ISO 11341.2004, some of them are equivalently adopted as our national standards, and our national standards replace the corresponding ones. The international standards of my country have not been directly adopted as the standards of our country. ---Because most of the evaluation of domestic paint aging results is based on GB/T 1766, so in Chapter 10, it is added Note 2.
This standard replaces GB/T 1865-1997 "Artificial weathering of artificial paint and varnish and artificial radiation exposure (filtered xenon arc radiation)". The main technical differences between this standard and the previous version of GB/T 1865-1997 are. --- The previous version is equivalent to ISO 11341..1994, this revision is equivalent to adopt ISO 11341..2004 ---The previous version only specified that the average irradiance of the sample plane between 290nm and 800nm is 550W/m2; the Chinese side of this standard Law 1 stipulates that the average irradiance between the wavelengths of 300nm and 400nm is 60W/m2, and the irradiance at 340nm is 0.51W/m2; Method 2 stipulates that the average irradiance between 300nm and 400nm wavelength is 50W/m2,420nm The irradiance is 1.1W/m2;
--- This standard adds a high irradiance test. Method 1 The average irradiance between 300nm and 400nm wavelength can be 60W/m2~180 W/m2, the irradiance at 340nm can be 0.51W/m2~1.5W/m2; Method 2 is The average irradiance between the wavelengths from 300nm to 400nm can be 50W/m2~162W/m2, the average irradiance at 420nm The degree can be 1.1W/m2~3.6W/m2;
---This standard increases the air temperature in the cabinet to (38±3)℃; ---The previous version stipulates that the relative humidity during artificial weathering is 60% to 80%, and this standard specifies the relative humidity during artificial weathering Humidity is 40% to 60%.
Appendix A of this standard is a normative appendix.
Appendix B of this standard is an informative appendix.
This standard was proposed by China Petroleum and Chemical Industry Association. This standard is under the jurisdiction of the National Coatings and Pigments Standardization Technical Committee. This standard was drafted by. CNOOC Changzhou Coating Chemical Research Institute, Asia Pacific Rus Material Testing Technology Co., Ltd., Kunming Shiming Technology Development Co., Ltd., Chery Automobile Co., Ltd.
The main drafters of this standard. Ji Xiaopei, Zhang Ping, Cheng Ge, Du Changsen, Chen Zheng. The previous versions of the standard replaced by this standard are as follows. ---GB/T 1865-1980, GB/T 1865-1997.
GB/T 1865-2009/ISO 11341.2004
Paints and varnishes
Artificial weathering and artificial radiation exposure
Filtered xenon arc radiation
1 Scope
This standard specifies the artificial weathering test procedure for the paint and varnish exposed to the xenon lamp device and water and water vapor. Aging results The coating can be evaluated individually by comparing the parameters selected before, during and after aging. This standard describes some of the most important parameters and details the conditions of use of the exposure device. 2 Normative references
The clauses in the following documents become the clauses of this standard through the quotation of this standard. For dated references, all subsequent documents The amendments (not including errata content) or revisions are not applicable to this standard, however, all parties to agreements based on this standard are encouraged to study Is the latest version of these files available? For the cited documents without date, the latest version applies to this standard. GB/T 3186 Sampling of raw materials for paints, varnishes and paints and varnishes (GB/T 3186-2006, ISO 15528..2000, IDT) GB/T 9271 standard test board for color paint and varnish (GB/T 9271-2008, ISO 1514.2004, MOD) GB/T 9278 Condition adjustment and test temperature and humidity of paint samples (GB/T 9278-2008, ISO 3270.1984, Paintsand varnishestheirdatasystems-Temperturesandimmediatesfordimentioning, IDT) GB/T 133452.2 Determination of paint film thickness of paints and varnishes (GB/T 13452.2-2008, ISO 2808.2007, IDT) GB/T 2077 Inspection and preparation of paint and varnish samples (GB/T 2077-2006, ISO 1513.1992, IDT) CIE Publication No. 85.1989 Sunlight Irradiance
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
The performance of the coating changes during the artificial weathering or artificial radiation exposure. Note. One measure of aging is expressed in terms of exposure radiant energy H at a wavelength range below 400 nm or at a specified wavelength such as 340 nm. After artificial climate The aging condition of aging or artificial radiation exposed coatings depends on the type of coating, the exposure conditions of the coating, and the selection used to monitor the aging process Performance and the extent of this performance change.
3.2
A measure of the exposed radiation energy of the test board can be calculated by the following formula. In the formula.
E---irradiance, the unit is watts per square meter (W/m2);
Note 1.H is expressed in joules per square meter (J/m2).
GB/T 1865-2009/ISO 11341.2004
3.3
Given a certain degree of aging, the degree of change in certain selected properties of the tested coating. Note. The aging index is specified or agreed.
4 Principle
The xenon arc light filtered by the filter is used to artificially weather the coating or artificially expose the radiation. The purpose is to make the coating After being exposed to a certain amount of radiant energy, the selected properties can be changed to a certain degree, or the coating can be aged to a certain degree. Exposure to radiant energy. The performance selected for monitoring should be an important performance of the coating in practical applications. The performance of the exposed coating can be Comparison of the performance of the unexposed coating (comparative sample) produced by the sample, or the coating with known performance (reference sample) exposed at the same time. In natural climates, solar radiation is considered to be the main cause of coating aging, and the principle of exposed radiation under window glass is the same. therefore For artificial weather aging and artificial exposure to radiation, it is crucial to simulate solar radiation. The xenon arc radiation source passes through two different One of the optical filtering systems to change the spectral distribution of the radiation it generates, respectively simulating the spectral distribution of ultraviolet and visible light of solar radiation (Method 1), to simulate the ultraviolet and visible spectral distribution of solar radiation after filtering through a 3mm thick window glass (Method 2). The energy distribution of the two spectra describes the irradiance value and allowable value of the optical radiation filtered by the filter in the ultraviolet range below 400 nm. Xu deviation. In addition CIENo. There is an irradiance standard for wavelengths up to 800 nm in 85 (see Appendix B), because only within this range, xenon arc radiation Radiation can better simulate solar radiation.
During the test of the exposure equipment, the irradiance may change due to the aging of the xenon arc and the filter system. This change occurs especially The photochemical influence of polymer materials has the largest ultraviolet range. Therefore, not only to measure the exposure time, but also to measure the below 400nm Wavelength range or exposure radiant energy at a specified wavelength such as 340 nm, and these values are used as reference values for coating aging. It is impossible to accurately simulate the effects of various aspects of climatic conditions on the coating. Therefore, the artificial climate aging is used in this standard Terminology to distinguish natural weather aging. The solar radiation test for simulating window glass filtering mentioned in this standard is called artificial radiation exposure. 5 Supplementary information required
For any specific application, the test methods specified in this standard need to be improved by supplementary information, which is listed in the attached Recorded in A.
6 Instruments
6.1 Test chamber
The test box should be made of corrosion-resistant materials, and the devices inside it include the radiation source of the filter system, the sample frame, etc. 6.2 Radiation source and filter system
The radiation source is composed of one or more xenon lamps, and the radiation generated by them is filtered by the filtering optical system, so that the irradiance is opposite to the plane of the sample frame The spectral energy distribution is similar to the ultraviolet and visible radiation of the sun (Method 1) or to the ultraviolet and solar radiation filtered through a 3mm window Visible light radiation is approximate (method 2).
Tables 1 and 2 give the required radiation spectral energy distribution, expressed as a percentage of the total range from 290 nm to 400 nm For the amount of radiant energy, Table 1 is a xenon lamp with a daylight filter, and Table 2 is a xenon lamp with a window glass filter. Table 1 Spectral irradiance distribution required by xenon lamps using daylight filters [Method 1 (Artificial Climate Aging)] Wavelength λ/
nm
Minimum value a, b/
CIENo. 85.1989 Table 4c, d/
Maximum value a, b/
λ≤290--0.15
290 < λ ≤ 320 2.6 5.4 7.9
320< λ≤360 28.2 38.2 38.6
GB/T 1865-2009/ISO 11341.2004
Table 1 (continued)
Wavelength λ/
nm
Minimum value a, b/
CIENo. 85.1989 Table 4c, d/
Maximum value a, b/
360< λ≤400 55.8 56.4 67.5
a The minimum and maximum limits are based on the manufacturer's recommended use conditions, measuring 113 batches with different daylight filters and different usage time with solar filters The spectra of water-cooled xenon lamps and air-cooled xenon lamps were obtained. The minimum and maximum limits are at least 3 times the standard deviation of the average of all measured values. b The sum of the minimum and maximum values is not necessarily 100%, because they represent the minimum and maximum values of the measured values. Irradiation of any spectrum Degrees, the percentage values of each band in this table add up to 100%. For any xenon lamp with daylight filter, the percentage value of each band is shown in the table Between the minimum and maximum values given in. If you use a xenon lamp device with an irradiance exceeding the allowable deviation, the test results will be different and can be set with the xenon lamp The manufacturer is contacted to obtain detailed data on the spectral irradiance of the xenon lamp and filter. c Appendix B gives the CIE publication No. 85.Japanese and Japanese spectral data in Table 4 of 1989.These data are used as standard values for xenon lamps equipped with daylight filters. dCIE publication No. 85.The solar spectrum data given in Table 4 (see Appendix B) of 1989, where the ultraviolet irradiance (290 nm to 400 nm) is at (290nm ~ 800nm) accounted for 11% of the total irradiance, visible light irradiance (400nm ~ 800nm) in the range (290nm ~ 800nm) 91% of irradiance. In practice, when the sample is exposed in the xenon lamp device, due to the number of exposed samples and their reflection performance, ultraviolet light and See the percentage of light irradiance may change.
Table 2 Spectral irradiance distribution required by xenon lamps using window glass filters (Method 2) Wavelength λ/
nm
Minimum value a, b/
CIENo. 85.1989 Table 4c, d/
Maximum value a, b/
λ≤300 0.29
300< λ≤320 0.1 ≤1 2.8
320< λ≤360 23.8 33.1 35.5
360< λ≤400 62.4 66.0 76.2
a The minimum and maximum limits are based on the manufacturer's recommended conditions of use, measuring 35 batches with window glass filters after different batch numbers and different use times The spectrum of the water-cooled xenon lamp and air-cooled xenon lamp was obtained. The minimum and maximum limits are at least 3 times the standard deviation of the average of all measured values. b The sum of the minimum and maximum values is not necessarily 100%, because they represent the minimum and maximum values of the measured values. Irradiation of any spectrum Degrees, the percentage values of each band in this table add up to 100%. For any xenon lamp with daylight filter, the percentage value of each band is shown in the table Between the minimum and maximum values given in. If you use a xenon lamp device with an irradiance exceeding the allowable deviation, the test results will be different and can be set with the xenon lamp The manufacturer is contacted to obtain detailed data on the spectral irradiance of the xenon lamp and filter. c The data in this table comes from the CIE publication No. 85.Table 4 of 1989, through the 3mm thick window glass (Appendix B) spectral data. These data are used as equipment Standard value of xenon lamp with window glass filter.
dCIE publication No. 85.Table 4 of 1989 (see Appendix B) gives the spectral data through the window glass, of which (300nm ~ 400nm) ultraviolet irradiance is at (300nm ~ 800nm) accounted for 9% of the total irradiance, visible light irradiance (400nm ~ 800nm) in the range (300nm ~ 800nm) 91% of irradiance. In practice, when the sample is exposed in the xenon lamp device, due to the number of exposed samples and their reflection performance, ultraviolet light and See the percentage of light irradiance may change.
Generally speaking, the radiant flux is selected so that the average irradiance E on the surface of the test sample is --- The average irradiance between 300nm and 400nm is 60W/m2, or 0.51W/m2 at 340nm (Method 1); - The average irradiance between 300nm and 400nm is 50W/m2, or 1.1W/m2 at 420nm (Method 2). Both parties can agree to use a high irradiance test, and can choose to make the average irradiance E on the surface of the test sample reach. --- The average irradiance between 300nm and 400nm is 60W/m2~180W/m, or 0.51W/m2~ at 340nm. 1.5W/m2 (Method 1);
GB/T 1865-2009/ISO 11341.2004
--- The average irradiance between 300nm and 400nm is 50W/m2~162W/m, or 1.1W/m2~ at 340nm. 3.6W/m2 (Method 2).
Note 1.The high irradiance test has been proved to be effective for several materials, such as automotive interior parts. When performing high irradiance tests, it is necessary to carefully check the performance is Does it change linearly with irradiance. When other test parameters (black standard temperature, blackboard temperature, cabinet temperature, relative humidity) remain unchanged, it may be less Results obtained under the same irradiance.
Note 2.It is recommended to measure and report the actual irradiance E between 300 nm and 800 nm. In the case of discontinuous operation (see 9.4), this value includes the cabinet Radiation reflected from the inner wall to the surface of the test sample. Note 3.The conversion factor used above to calculate the irradiance of the narrow band (340 nm or 420 nm) based on the irradiance of the wide band (300 nm to 400 nm) The average value of different filter systems is taken. The specific value of this conversion factor is usually provided by the manufacturer. The change of the irradiance E reaching any point on the surface of the sample should not exceed ±10% of the arithmetic mean of the irradiance reaching the entire surface. The ozone generated during the operation of the xenon lamp is not allowed to enter the test box and should be discharged separately. If this is not possible, the test board should be at intervals Change the position once to get the same exposure at each position.
In order to further accelerate the aging, if the correlation between the performance of the specific coating under test and the aging of the natural climate is known, the phase The parties agreed to use a variety of spectral energy distribution and irradiance conditions different from those described above. This can be done by increasing the irradiance or by specifying The method moves to the band of the spectral energy distribution of the short-wave terminal, shortening the wavelength to achieve further accelerated aging. Instructions on methods different from this , Must be noted in the report.
The aging of xenon lamps and filters will cause changes in relative spectral energy distribution and decrease in irradiance during operation. The spectral energy distribution and irradiance remain constant. You can also refer to the equipment manufacturer's instructions to adjust the equipment to keep the irradiance constant. 6.3 Test box adjustment system
In order to maintain the black mark or blackboard temperature of the test box specified in 9.2, dust removal air should be circulated in the box, the humidity and temperature are controlled Made. The temperature and relative humidity of the air in the test chamber are controlled by temperature and humidity sensors, which are not directly irradiated. Relatively wet The degree of adjustment water must be distilled water or demineralized water specified in 9.5. Note. When fresh air is continuously supplied to the test chamber, the operating conditions of the equipment may be different. For example, summer is different from winter because of the summer air Humidity is generally higher than the air humidity in winter, which will affect the test results. Circulating air in a tightly closed loop can improve the results again Presentity.
6.4 Device for wetting the model (for method 1)
Note 1.Method 1 includes the wetting of the sample, which is to simulate the rain and condensation in the outdoor environment. The design of the wetting device is detailed in 9.5.The test sample used during the entire wetting process should be wetted according to one of the following two methods. a) The surface is sprayed with water;
b) The sample is immersed in water in the test box.
Note 2.The test results obtained by spraying and immersing in the sample are not necessarily similar. If the samp...

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