GB/T 31926-2015Zinc and aluminum based coatings on steel sheets and strips - Determination of lead, cadmium and chromium contens - Glow discharge atomic emission spectrometry method (English PDF)
钢板及钢带 锌基和铝基镀层中铅、镉和铬含量的测定 辉光放电原子发射光谱法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
September 11, 2015
Implementation date
June 1, 2016
Scope
GB/T 31926-2015 is the English-translated version of 钢板及钢带 锌基和铝基镀层中铅、镉和铬含量的测定 辉光放电原子发射光谱法.
GB/T 31926-2015 is the Chinese standard "Zinc and aluminum based coatings on steel sheets and strips - Determination of lead, cadmium and chromium contens - Glow discharge atomic emission spectrometry method".
Its scope clause reads: This standard specifies the glow discharge atomic content of lead, cadmium and chromium emission spectrometry. This standard applies to 1µm ~ 50µm coating thickness of the steel sheet and strip the surface of pure zinc, zinc, iron, zinc, aluminum, lead and cadmium zinc coating of chromium Determination of.
Measurement range (mass fraction). Lead. 0.0035% to 0.2%; Cadmium. 0.003% to 0.2%; Cr. 0.002% to 0.02%. Its clauses include reagents and materials; instruments.
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Document preview — GB/T 31926-2015
National Standard of the People's Republic of China
- ICS
- 77.080.01
- Classification
- H 11
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 4 Reagents and materials
- 5 Instruments
1 Scope
This standard specifies the glow discharge atomic content of lead, cadmium and chromium emission spectrometry.
This standard applies to 1µm ~ 50µm coating thickness of the steel sheet and strip the surface of pure zinc, zinc, iron, zinc, aluminum, lead and cadmium zinc coating of chromium
Determination of. Measurement range (mass fraction). Lead. 0.0035% to 0.2%; Cadmium. 0.003% to 0.2%; Cr. 0.002% to 0.02%.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 6379.2 measurement methods and results of Accuracy (trueness and precision) - Part 2. Determine the standard measurement method to repeat
Of the basic methods of reproduction
GB/T 19502 Surface chemical analysis - Glow discharge optical emission spectrometry method General
GB/T 20066 Steel and iron - Sampling and determination of the chemical composition of the sample with a sample preparation method
Principle 3
The cathode having a flat surface of the sample as a glow discharge apparatus, the sample produces the female DC or RF glow discharge apparatus
Pole sputtering, atomic measurement sample characteristic spectral line intensities. When the depth of analysis, emission intensity is recorded as a function of time, by means of a calibration curve,
The intensity function of time into a function of the mass fraction of the sputtering depth. Known by measuring the composition of the reference sample sputtering rate can be built
Li calibration system. According to the intensity of the relationship between line elements in the sample with the concentration calculation software obtained by coating samples were analyzed, the coating to be
Measuring the content of the element.
4 Reagents and materials
Discharge gas. typically high purity argon, 99.999% Purity.
5 Instruments
5.1 Overview
Glow Discharge Atomic Emission Spectrometer is normally provided by Grimm type in GB/T 19502 or the like described glow discharge source (package
Composition containing a DC or RF power supply mode) and simultaneous spectrometer detector. Spectrometer has been adapted to analyze elemental analysis of line. Diameter
An anode within the range of 2mm ~ 8mm can be used. Distance between cathode and anode is generally between 0.1mm ~ 0.3mm. Recommended cold […]
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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