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GB/T 7962.22-2019: Test method of colourless optical glass -- Part 22: Resistance to attack by aqueous alkaline phosphate-containing
Status: Valid GB/T 7962.22: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 7962.22-2019 | English | 279 |
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Test method of colourless optical glass -- Part 22: Resistance to attack by aqueous alkaline phosphate-containing
| Valid |
GB/T 7962.22-2019
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| GB/T 7962.22-1987 | English | 239 |
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Colourless optical glass test methods--Temperature coefficient of refractive index
| Obsolete |
GB/T 7962.22-1987
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Basic data | Standard ID | GB/T 7962.22-2019 (GB/T7962.22-2019) | | Description (Translated English) | Test method of colourless optical glass -- Part 22: Resistance to attack by aqueous alkaline phosphate-containing | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | L50 | | Classification of International Standard | 81.040.01 | | Word Count Estimation | 14,162 | | Date of Issue | 2019-08-30 | | Date of Implementation | 2020-03-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 7962.22-2019: Test method of colourless optical glass -- Part 22: Resistance to attack by aqueous alkaline phosphate-containing
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Test method of colourless optical glass - Part 22. Resistance to attack by aqueous alkaline phosphate-containing
ICS 81.040.01
L50
National Standards of People's Republic of China
Colorless optical glass test method
Part 22. Phosphoric acid stability
Part 22.Resistancetoattackbyaqueousalkalinephosphate-containing
(ISO 9689.1990, Rawopticalglass-Resistancetoattackbyaqueous
Andclassification, MOD)
Published on.2019-08-30
2020-03-01 implementation
State market supervision and administration
China National Standardization Administration issued
Content
Foreword III
1 Scope 1
2 Normative references 1
3 Principle 1
4 reagent 1
5 Instrument 2
6 Samples to be tested 3
7 Test Step 4
8 result calculation 6
9 Grading and Judging 7
10 Test Report 7
Appendix A (informative) Structural changes in this section compared to ISO 9689.1990 9
Foreword
GB/T 7962 "Colorless Optical Glass Test Method" is divided into the following 23 parts.
--- Part 1. Refractive index and dispersion coefficient;
--- Part 2. Optical uniformity Fizeau plane interferometry;
--- Part 3. Optical uniformity holographic interferometry;
---Part 4. Temperature coefficient of refractive index;
---Part 5. Stress birefringence;
---Part 6. Young's modulus, shear modulus and Poisson's ratio;
--- Part 7. Stripe degree;
--- Part 8. Bubble degree;
---Part 9. Light absorption coefficient;
--- Part 10. X-ray resistance;
--- Part 11. Visible refractive index precision test;
--- Part 12. Intraspectral transmittance;
--- Part 13. Thermal conductivity;
---Part 14. Acid and stability;
---Part 15. moisture stability;
---Part 16. Linear expansion coefficient, transition temperature and sag temperature;
---Part 17. UV, infrared refractive index;
---Part 18. Krebs hardness;
---Part 19. Wear;
--- Part 20. Density;
---Part 21. alkali resistance stability;
---Part 22. Resistance to phosphoric acid stability;
--- Part 23. Weather stability.
This part is the 22nd part of GB/T 7962.
This part is drafted in accordance with the rules given in GB/T 1.1-2009.
This section uses the redrafting method to modify the alkalinity of the optical glass blank in a detergent solution at 50 ° C using ISO 9689.1990
Phosphoric acid stability test method and classification.
This section has more structural adjustments than ISO 9689.1990. This section is listed in Appendix A with ISO 9689.1990.
The chapter number change comparison checklist.
The technical differences between this part and ISO 9689.1990 and their reasons are as follows.
---About the normative reference documents, this part has made specific technical differences to adapt to China's technical conditions, adjustments
The situation is reflected in Chapter 2, “Regulatory Citations”, and the specific adjustments are as follows.
● Replace ISO 2768-1.1989 with GB/T 1804-2000 equivalent to international standards;
● Replaced ISO 3696.1987 with GB/T 6682-2008 modified to adopt international standards;
● Removed ISO 3585.1976;
● Added references to GB/T 678, GB/T 903 and GB/T 1185-2006.
--- Unify "2-propanol" into "isopropyl alcohol" (based on its molecular formula and role, judge the two as the same substance, according to Chinese custom
name).
--- Chapter 6 adds 6.1 material requirements (reducing differences in test results due to material differences).
--- Change the requirements of 6.1 polishing and refining process in ISO 10629.1996 to the quality requirements of 6.2 of this part (for standard
Implementation).
--- Modified the measurement accuracy of the 6.3 size (reducing the surface area difference of the sample to be tested).
--- The contents of Chapter 7 are re-striped and modified according to test requirements and test procedures, adding tolerances, etc.
Implementation).
--- The table is graded after the decimal point of the phosphoric acid resistant phosphoric acid stability, increasing the format of the test report.
This section has made the following editorial changes.
--- Change the standard name to "Colorless optical glass test method Part 22. Phosphoric acid stability";
--- Added informative Appendix A.
Please note that some of the contents of this document may involve patents. The issuing organization of this document is not responsible for identifying these patents.
This part was proposed by the Machinery Industry Federation.
This part is under the jurisdiction of the National Optical and Photonics Standardization Technical Committee (SAC/TC103).
This section drafted by. Chengdu Guangming Optoelectronics Co., Ltd., Xi'an Bingbiao Testing Co., Ltd., Shanghai Optics, Chinese Academy of Sciences
Institute of Precision Machinery.
The main drafters of this section. Zhou Wei, Luo Lianghong, Wen Wei, Yun Shidong, Li Bo, Fu Yaolong, Hu Junjiang.
Colorless optical glass test method
Part 22. Phosphoric acid stability
1 Scope
This part of GB/T 7962 specifies the principle, test procedure, data processing and method of the phosphoric acid stability test method for colorless optical glass.
Grading, etc.
This section applies to colorless optical glass, other types of glass can be used as reference.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 678 chemical reagent ethanol (anhydrous ethanol)
GB/T 903 colorless optical glass
GB/T 1185-2006 Optical parts surface rickets
GB/T 1804-2000 General tolerances tolerances for linear and angular dimensions without tolerances (eqv ISO 2768-1.1989)
GB/T 6682-2008 Analytical laboratory water specifications and test methods (ISO 3696.1987, MOD)
3 Principle
When the polished sample is placed in a tripolyphosphate alkaline solution at a temperature of 50 ° C and a concentration of 0.01 mol/L, the corrosion is specified.
During the weighing, the mass loss of the sample to be measured is measured, and the depth of erosion is calculated based on the glass density. According to the time required for erosion to reach 0.1μm and invade
The change of the surface of the sample to be tested after the completion of the etching determines the grade of the phosphoric acid stability of the tested glass.
4 reagents
4.1 General
Chemical reagents should be used during the test unless otherwise specified.
4.2 Water
Should meet the requirements of the secondary water specified in GB/T 6682-2008.
4.3 Phosphate solution
4.3.1 Tripolyphosphate purification
Prepare a tripolyphosphate solution with a mass fraction of 10% to 15%. After filtering out the insoluble matter, gradually add ethanol to reach the volume of ethanol.
Phosphate solution volume = 4.1. Stir for about 30 min, filter out the crystals of hexahydrate, and mix the solution (volume ratio. water. ethanol = 1.1)
Wash twice. The hexahydrate crystals were then filtered off with a very small amount of water, and the above washing process was repeated at least four times. At room temperature and relative humidity
The crystals were dried at (50 ± 10)%. The purity of the tripolyphosphate obtained after purification is ≥99.5%.
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