GB/T 4653-1984 General technical requirements for infrared radiation coatings
Some standard content:
National Standard of the People's Republic of China
General Technical Conditions for Infrared Radiation Paints
The general technical spectfications on infrared radiatlon paints
This standard applies to various infrared radiation paint products (hereinafter referred to as paints) UDC667.81*538
.2 - 15
GB4653-84
The material can be widely used in heating equipment in industries, agriculture and other departments to improve the radiation emittance or change the distribution of radiation energy spectrum to obtain significant energy-saving benefits.
1 Formulation, temperature, type and substrate
1.1 Formulation
The paint is made of radiation material, binder and diluent. 1.2 Applicable temperature range
Below 200℃;
200 ~600 C1
600~1200℃.
1.3 Type
Organic binder type coating;
Inorganic binder type coating.
1.4 Substrate
Metallic materials,
Inorganic non-metallic materials.
2 Technical conditions
2.1 The performance of the coating shall comply with the requirements of this standard and be manufactured in accordance with the technical documents and process formula approved by the prescribed procedures. 2.2 The coating shall have a suspension suitable for the coating process (immersion, brushing, spraying). The slurry after stirring and homogenizing shall not separate within 1 hour.
2.3 The viscosity performance suitable for the coating process (immersion, brushing, spraying) shall be provided. The deviation of each batch of products shall not exceed 10% of the specified value. 2.4 The adhesion strength of the coating to the substrate. Organic binder coatings are measured by the rolling line scratch method and should not be lower than the industrial grade 3 standard. Inorganic binder coatings are measured by the falling ball impact method. After being subjected to an impact of 2000 gcm, the coating should be free of cracks and peeling. 2.5 Resistance to hot and cold alternation. The sample is heated from room temperature to the specified temperature, and then cooled to room temperature, repeatedly, and the surface of the coating is tested to be free of powdering, bubbling, cracking, and peeling. 2.6 Resistance to moisture and heat of organic binder coatings. It can work normally under humid conditions, and the coating has no bubbling or shedding. 2.7 The coating spectral emissivity z in the wavelength range of 2.5 to 15 microns (μm) should be given at least. When the test value of each batch of products is compared with the reference signal, the maximum negative deviation should not exceed 0.05. 2.8 The normal 1 total emissivity En of the coating should not be lower than 0.85. 2.9 Anti-aging performance. After the 500h over-temperature test, the coating has no powdering, blistering, cracking, or peeling, and the total emissivity value is no less than 95% of the value specified in Article 2.8. 2.10 All infrared radiation coatings used in industries such as food, daily necessities, and agricultural products shall comply with national food hygiene standards. For coatings containing radioactive elements, their content shall comply with national standards. National Bureau of Standards 19840820 Issued
1985:0501 Implementation
GB4653--84
2.11 The slurry shall not contain any debris, and the containers such as bottles, cans, and cans shall be intact, and the marking and packaging shall comply with product regulations. 2.12 The effective use period of sealed packaging coating products shall be more than half a year. a Test method (Appendix A)
4 Inspection rules
4.1 Coating products shall be inspected and qualified by the quality inspection department of the manufacturer before they can leave the factory, and shall be accompanied by a product certificate. 4.2 The tests of coating products are divided into factory tests and type tests. 4.3 Factory tests
4.3.1 Check and accept each product piece by piece according to Article 2.11 of this standard. 4.3.2 Carry out sampling inspection according to Articles 2.2 and 2.3 of this standard, with a sampling rate of 1% of the total. 4.3.3 According to the requirements of Articles 2.4 and 2.5 of this standard, samples should be made and tested, with no less than 3 samples. 4.4 In the following cases, type tests should be carried out according to the requirements of Articles 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 2.10 and 2.11 of this standard.
4.4.1 When the trial production of new products is completed:
4.4.2 At least once every six months for normal products, 4.4.3 When there are major changes in raw materials, formulas, and processes, 4.4.4 When production is resumed after being suspended for a time.
4.5 The number of samples and specimens for type test shall be no less than 3 each. If one of them fails to meet any requirement of this Regulation, double the number of products shall be sampled from the same batch of products and specimens shall be made for testing. If one still fails to meet the requirements, the batch of products shall be deemed unqualified.
5 Marking, packaging, storage
5.1 Marking
The surface of bottles, cans, tins and other containers should be labeled with the following information: 5.1.1 Product model and name:
Registered trademark,
5.1.3 Weight
5.1.*Production date and factory date,
5.1.5 Storage period;
5.1.6 Precautions (such as flammable, corrosive, toxic, antifreeze). 5.2 Packaging
5.2.1 The material of the coating product container must not react chemically with the coating. 5.2.2 The packaging must be sealed to prevent spillage. Fragile, easily damaged and easily deformed containers must be packaged in wooden boxes or corrugated boxes.
5.2 .3. The packaging box should be marked with words:
Build, product model,
b. Manufacturer name:
Weight, quantity:
d. Box dimensions,
e: Receiving unit and address
f. "Fragile", "Handle with care", "Moisture-proof", "Do not invert" and other signs. 5.2.4 The box should be accompanied by a product certificate and relevant technical instructions. 5.3 Storage
GB4653—84
The product should be sealed and stored in a dry and ventilated warehouse. Fire is strictly prohibited. 5.8.1
5.3.2 Flammable, corrosive and toxic substances should be stored in accordance with relevant national regulations. A.1 Suspension test (Article 2.2)
GB 4653—84
Appendix A
Test method
(reference)
Take 200 ml of the slurry prepared according to the process ratio, stir it evenly and place it in a cup, let it stand for 1 hour, observe the slurry surface, there should be clear liquid and stratification.
A.2 Viscosity test (Article 2.3)
Use Tu-4 viscometer and conduct it according to GB1723-79 "Determination of paint film viscosity". A.3 Adhesion fastness test (Article 2.4)
A.3.1 Organic binder type coatings shall be conducted according to GB1720-79 "Determination of paint film adhesion". A.3.2 Inorganic binder type coatings shall be conducted according to GB1732-79 "Determination of paint film impact resistance". A.4 Hot and cold alternating performance test (Article 2.5) According to the specified process, mix the material The slurry is applied on the treated gold belly test piece with a surface area of 50×120×(1～1.5)mm to prepare the test sample, at least 4 pieces, of which 3 pieces are placed in the heating furnace to the specified temperature, kept for 30 minutes, and then 1 piece is quickly taken out, and immediately cooled to room temperature at a wind speed of 5(～60m/min, and the cycle is repeated for 5 times. It should be compared with another untested sample and meet the requirements of Article 2.5. The material of the metal test piece can be selected according to the test. Generally, carbon steel, stainless steel and other materials can be used for materials below 600℃, and stainless steel and other materials can be used for materials above 600℃.
The heat-resistant temperature should be divided according to the product temperature. Below 200℃, it is 1.30 times the maximum use temperature of the product, 200~600℃, it is 1.10 times the maximum use temperature of the product; 600~1200℃, it is 1.05 times the maximum use temperature of the product. A,5 The moisture and heat resistance test (Article 2.6) shall be carried out in accordance with GB1740-79 "Determination of moisture and heat resistance of paint film". A.6 Spectral emissivity is tested (Article 2.7) The expression of spectral emissivity e, is:
Wherein: M (-T) - spectral radiation emittance of the coating sample at temperature T and wavelength in the interval of ^, W/m·μ) M, (^.T) is the spectral radiation emittance of the black body surface at the same temperature T and wavelength △^ interval of the sample, W/m2μm). A.6.1 Test conditions
The test temperature T (K) value can be selected according to the working temperature range of the coating, and the band of spectral emissivity ε: should at least give a range of 2.5 to 15 microns (μm). A,6.2 Test device
Reasonably, it is recommended to use "700-1200K coating and material infrared spectroscopy normal emissivity tester". Note: Xu Lechang, Shao Jiecheng, Fu Ruihua, "700-1200K coating and material infrared spectroscopy normal emissivity determination", Journal of Thermophysics, Vol. 5, No. 1 (1984), PP75-81.
b. Before the state issues a unified test method, other spectral emissivity test devices that have been approved by relevant departments and experts and passed the appraisal.
A.6.3 Data analysis
GB 4653-84
Compare the test value with the reference value in the graph.
Maximum negative deviation 41≤0.15
.(μm)
Schematic diagram of spectral emissivity curve
"Coating product reference curve
"Coating actual measurement curve.
A,7 Normal total emissivity test (Article 2.8) The expression of normal total emissivity 8 is
Mn(T)
Mb\n(T)
Where: M,n(T)—Full wavelength radiation emittance in the direction perpendicular to the coating sample at temperature T, W/m2, Full wavelength radiation emittance in the direction perpendicular to the black body surface at temperature T, W/m. Mh*n(T)
A.7,1 Test conditions
The test temperature T (K) value can be selected according to the working temperature range of the coating. A,7.2 Test device
a. It is recommended to use a "medium temperature normal total emissivity tester". Note: Xu Shutang, Shao Jiesu, He Yancai "Research on thermal emissivity test device" Infrared Technology No. 1 (1980) PP14-26. b. Integrate the spectrum according to the spectral emissivity e: geaMba.Td2.wwW.bzxz.Net
Jo Mba.rda
Where:
Light emissivity:
Spectral radiation emittance of a black body at the same temperature T as e, W/(m2·μm). (A2)
c. Before the unified test method is promulgated at home, any similar test device approved by relevant departments and experts and passed the appraisal. AB Anti-aging Performance Test (Article 2.9) The slurry is applied to the test piece. The material of the test piece is selected according to the use temperature provisions of Article A.4 of this standard, and the size is made according to the requirements for determining the residual emissivity e. During the test, 3 samples are placed in a high-temperature furnace or a constant temperature box for insulation, respectively, at 1.05~1.30 times the highest use temperature of the coating (see Article A, 4). After 500h of long-term heat treatment, they are still inspected according to Articles 2.7 and 2.8 of this standard. A.9 Sample preparation method
Prepare in accordance with GB1727-79 "General preparation method for paint film". .
Additional notes:
46538
This standard was proposed by the National Bureau of Standards and drafted by the National Technical Committee for Energy Basics and Management Standardization and the Shanghai Standards and Metrology Administration. This standard was drafted by the Shanghai Institute of Energy Utilization Technology, the Shanghai Institute of Bricks and Oxides of the Chinese Academy of Sciences, and the Shanghai Infrared and Remote Sensing Society.
The main drafters of this standard are Zhu Zhongming, Gong Shengguang, Xia Jiyu, Zhou Ruonan, and Xu Liewei.
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