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GB/T 16921-2005   Metallic coatings-Measurement of coating thickness-X-ray spectrometric methods (English Version)
Standard No.: GB/T 16921-2005 Status:valid remind me the status change

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Language:English File Format:PDF
Word Count: 7000 words Price(USD):170.0 remind me the price change

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Implemented on:2006-4-1 Delivery: via email in 1 business day
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Standard No.: GB/T 16921-2005
English Name: Metallic coatings-Measurement of coating thickness-X-ray spectrometric methods
Chinese Name: 金属覆盖层 覆盖层厚度测量 X射线光谱方法
Chinese Classification: A29    Material Protection
Professional Classification: GB    National Standard
ICS Classification: 25.220.20 25.220.20    Surface treatment 25.220.20
Issued by: AQSIQ; SAC
Issued on: 2005-10-12
Implemented on: 2006-4-1
Status: valid
Superseding:GB/T 16921-1997 Measurement of metallic coating thickness X-ray spectrometric methods
Language: English
File Format: PDF
Word Count: 7000 words
Price(USD): 170.0
Delivery: via email in 1 business day
1 Scope Warning: Problems concerning protection of personnel against X-rays are not covered by this standard. For information on this important aspect, reference should be made to current international and national standards, and to local regulations, where these exist. 1.1 This standard specifies methods for measuring the thickness of metallic coatings by the use of X-ray spectrometric methods. 1.2 The measuring methods to which this standard applies are fundamentally those that determine the mass per unit area. If the density of coating material is known, the results of measurements can also be expressed as linear thickness of the coating. 1.3 The measuring methods permit simultaneous measurement of coating systems with up to three layers, or simultaneous measurement of thickness and compositions of layers with up to three components. 1.4 The practical measurement ranges of given coating materials are largely determined by the energy of the characteristic X-ray fluorescence to be analyzed and by the acceptable measurement uncertainty and can differ depending upon the instrument system and operating procedure used. 2 Terms and Definitions For the purposes of this standard, the following terms and definitions apply. 2.1 X-ray fluorescence (XRF) secondary radiation occurring when a high intensity incident X-ray beam impinges upon a material placed in the path of the incident beam Note: The secondary emission has wavelengths and energies characteristic of that material. 2.2 intensity of fluorescent radiation radiation intensity, x, measured by the instrument, expressed in counts (radiation pulses) per second 2.3 saturation thickness thickness that, if exceeded, does not produce any detectable change in fluorescent intensity Note: Saturation thickness depends upon the energy or wavelength of the fluorescent radiation, density and atomic number of the material and on the angle of incident and fluorescent radiation with respect to the surface of the material. 2.4 normalized intensity xn ratio of the difference in intensity obtained from a coated test specimen, x, and an uncoated basis material, x0, and the difference obtained from a material of thickness equal to or greater than the saturation thickness, xs (see 2.3) and an uncoated basis material, x0, all measured under the same conditions
Foreword i 1 Scope 2 Terms and Definitions 3 Principle 4 Apparatus 5 Factors that Influence the Measurement Results 6 Calibration of Instrument 7 Procedure 8 Measurement Uncertainty 9 Test Report Annex A (informative) Typical Measuring Ranges for Some Common Coating Bibliography
GB/T 16921-2005 is referred in:
* QB/T 2997-2008 Adornment with precious metal coating
*GB/T 12599-2002 Metallic coatings--Electroplated coatings of tin--Specification and test methods
*JB/T 12855-2016 Metallic coatings. Electroplated coatings of zinc-nickel alloys
*GB/T 32022-2015 Adornment with precious metal coating
*GB/T 13913-2008 Metallic coatings - Autocatalytic (Electroless) nickel-phosphorus alloy coatings - Specification and test methods
*GB/T 6463-2005 Metallic and other inorganic coatings-Review of methods of measurement of thickness
*GB/T 41950-2022 Metallic coatings—Electroplated coatings of zinc and zinc alloys on iron or steel with supplementary Cr(Ⅵ)-free treatment
*GB/T 34190-2017 Surface coating weight(thickness) of electrical steel―X-ray spectrometric method
*NB/T 20001-2023 Manufacturing specifications for nuclear island machinery and equipment in pressurized water reactor nuclear power plants
*QC/T 625-2024 Metallic coatings and conversion coatings for automobile
Code of China
Standard
GB/T 16921-2005  Metallic coatings-Measurement of coating thickness-X-ray spectrometric methods (English Version)
Standard No.GB/T 16921-2005
Statusvalid
LanguageEnglish
File FormatPDF
Word Count7000 words
Price(USD)170.0
Implemented on2006-4-1
Deliveryvia email in 1 business day
Detail of GB/T 16921-2005
Standard No.
GB/T 16921-2005
English Name
Metallic coatings-Measurement of coating thickness-X-ray spectrometric methods
Chinese Name
金属覆盖层 覆盖层厚度测量 X射线光谱方法
Chinese Classification
A29
Professional Classification
GB
ICS Classification
Issued by
AQSIQ; SAC
Issued on
2005-10-12
Implemented on
2006-4-1
Status
valid
Superseded by
Superseded on
Abolished on
Superseding
GB/T 16921-1997 Measurement of metallic coating thickness X-ray spectrometric methods
Language
English
File Format
PDF
Word Count
7000 words
Price(USD)
170.0
Keywords
GB/T 16921-2005, GB 16921-2005, GBT 16921-2005, GB/T16921-2005, GB/T 16921, GB/T16921, GB16921-2005, GB 16921, GB16921, GBT16921-2005, GBT 16921, GBT16921
Introduction of GB/T 16921-2005
1 Scope Warning: Problems concerning protection of personnel against X-rays are not covered by this standard. For information on this important aspect, reference should be made to current international and national standards, and to local regulations, where these exist. 1.1 This standard specifies methods for measuring the thickness of metallic coatings by the use of X-ray spectrometric methods. 1.2 The measuring methods to which this standard applies are fundamentally those that determine the mass per unit area. If the density of coating material is known, the results of measurements can also be expressed as linear thickness of the coating. 1.3 The measuring methods permit simultaneous measurement of coating systems with up to three layers, or simultaneous measurement of thickness and compositions of layers with up to three components. 1.4 The practical measurement ranges of given coating materials are largely determined by the energy of the characteristic X-ray fluorescence to be analyzed and by the acceptable measurement uncertainty and can differ depending upon the instrument system and operating procedure used. 2 Terms and Definitions For the purposes of this standard, the following terms and definitions apply. 2.1 X-ray fluorescence (XRF) secondary radiation occurring when a high intensity incident X-ray beam impinges upon a material placed in the path of the incident beam Note: The secondary emission has wavelengths and energies characteristic of that material. 2.2 intensity of fluorescent radiation radiation intensity, x, measured by the instrument, expressed in counts (radiation pulses) per second 2.3 saturation thickness thickness that, if exceeded, does not produce any detectable change in fluorescent intensity Note: Saturation thickness depends upon the energy or wavelength of the fluorescent radiation, density and atomic number of the material and on the angle of incident and fluorescent radiation with respect to the surface of the material. 2.4 normalized intensity xn ratio of the difference in intensity obtained from a coated test specimen, x, and an uncoated basis material, x0, and the difference obtained from a material of thickness equal to or greater than the saturation thickness, xs (see 2.3) and an uncoated basis material, x0, all measured under the same conditions
Contents of GB/T 16921-2005
Foreword i 1 Scope 2 Terms and Definitions 3 Principle 4 Apparatus 5 Factors that Influence the Measurement Results 6 Calibration of Instrument 7 Procedure 8 Measurement Uncertainty 9 Test Report Annex A (informative) Typical Measuring Ranges for Some Common Coating Bibliography
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