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GB/T 5124.1-2008: Methods for chemical analysis of hard metals -- Determination of total carbon content -- Gravimetric method
Status: Valid GB/T 5124.1: Evolution and historical versions
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| GB/T 5124.1-2008 | English | 114 |
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Methods for chemical analysis of hard metals -- Determination of total carbon content -- Gravimetric method
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GB/T 5124.1-2008
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| GB/T 5124.1-1985 | English | 199 |
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Methods for chemical analysis of hardmetals--The gravimetric method for the determination of total carbon content
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GB/T 5124.1-1985
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PDF similar to GB/T 5124.1-2008
Basic data | Standard ID | GB/T 5124.1-2008 (GB/T5124.1-2008) | | Description (Translated English) | Methods for chemical analysis of hard metals -- Determination of total carbon content -- Gravimetric method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H71 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 6,656 | | Date of Issue | 2008-03-31 | | Date of Implementation | 2008-09-01 | | Older Standard (superseded by this standard) | GB/T 5124.1-1985 | | Adopted Standard | ISO 3907-1985, IDT | | Regulation (derived from) | National Standard Approval Announcement 2008 No.5 (Total No.118) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the method for determination of total carbon carbide and carbide volume. This section applies to chromium, hafnium, molybdenum, niobium, tantalum, titanium, vanadium, tungsten and zirconium carbide, which mixes with the bonding metal carbides (no lubricant), and from these carbide production of all grades of Determination of total carbon content of the pre-sintered or sintered carbide. Measuring range: total carbon content of greater than 4%. | GB/T 5124.1-2008: Methods for chemical analysis of hard metals -- Determination of total carbon content -- Gravimetric method
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Methods for chemical analysis of hardmetals. Determination of total carbon content. Gravimetric method
ICS 77.120.99
H71
National Standards of People's Republic of China
GB/T 5124.1-2008/ISO 3907. 1985
Replacing GB/T 5124.1-1985
Carbide chemical analysis
Determination of total carbon content
Gravimetric method
(ISO 3907. 1985, Hardmetals-Determinationoftotalcarboncontent-
Gravimetricmethod, IDT)
Posted 2008-03-31 2008-09-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 5124 "Methods for chemical analysis Carbide" is divided into four parts.
--- GB/T 5124.1 Carbide chemical analysis of total carbon content - Gravimetric method
--- GB/T 5124.2 Carbide chemical analysis of insoluble (free) carbon content - Gravimetric method
--- GB/T 5124.3 Determination of cobalt content Carbide chemical analysis of potentiometric titration
--- GB/T 5124.4 Carbide chemical analysis of peroxide spectrophotometric determination of titanium content
This is Part 1.
This part identical with ISO 3907. 1985 "Carbide total carbon content - Gravimetric method."
For ease of use, this section made the following editorial changes.
--- With "this Part" instead of "this International Standard";
--- With a decimal point instead of as a decimal in the international standards ",". ",";
--- Remove the cover of the international standards, foreword.
This Part replaces GB /"Determination of total carbon content - Gravimetric method chemical carbide" T 5124.1-1985.
This portion of the GB/T 5124.1-1985 main changes are as follows.
--- Increase the "scope", "Normative references" and other normative general elements.
This part is proposed by the China Nonferrous Metals Industry Association.
The non-ferrous metal part by the National Standardization Technical Committee.
This section Zhuzhou Cemented Carbide Group Co., Ltd., China Nonferrous Metals Industry Institute of Standards Metrology and Quality is responsible for drafting.
The main drafters of this section. Guo Peng, Zhang Jie, Tanhong Yong, Li Ping, Jiang Yafang, Zhangjiang Feng.
This part of the standard replaces the previous editions are.
--- GB/T 5124.1-1985.
GB/T 5124.1-2008/ISO 3907. 1985
Carbide chemical analysis
Determination of total carbon content
Gravimetric method
1 Scope
This section specifies the determination method of carbides and carbide total amount of carbon.
This section applies to chromium, hafnium, molybdenum, niobium, tantalum, titanium, vanadium, tungsten and zirconium carbide, carbide and mixtures of these metal bonding (no lubrication
Determination of total carbon content of the pre-sintered or sintered carbide agent), and from these the carbide produced in all grades. Measurement range. total carbon
Content greater than 4%.
2 principle of the method
In the high-temperature, oxygen gas stream, the carbon dioxide into oxygen, if necessary by adding flux.
Carbon dioxide generated by the oxygen carried to the constant absorption bottle has been absorbed asbestos caustic soda, caustic soda asbestos measured increment, and its value is
The amount of carbon dioxide produced.
C + O → 2 CO2
2NaOH + CO → 2 Na2CO3 + H2O
3 Reagents
Always use analytical reagent during analysis, with distilled water or equivalent purity water.
3.1 oxygen. oxygen per cubic meter in the carbon-containing impurities limit the amount ≤0.6mL.
3.2 magnesium perchlorate. Anhydrous.
Note. To prevent an explosion, the agent should avoid contact with organic matter, especially when you discard it should pay special attention.
3.3 Flux. metals such as tin, copper oxide or metallic copper, metallic iron.
3.4 caustic soda asbestos.
4 Instrument
General laboratory instruments and
4.1 consists of a combustion tube furnace with a purification system and a system consisting of carbon dioxide absorption instrument. If you need to get
Appropriate purity oxygen, oxygen can also use a purification system.
The connecting portion of the instrument with sealing compound of the connecting pipe are connected together. The instrument is shown in Figure 1.
GB/T 5124.1-2008/ISO 3907. 1985
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