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SN/T 1324-2003: Determination of tin coating mass of electrolytic tinplate for import and export -- Coulometric test method
Status: Obsolete
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| SN/T 1324-2003 | English | 239 |
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Determination of tin coating mass of electrolytic tinplate for import and export -- Coulometric test method
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SN/T 1324-2003
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Basic data | Standard ID | SN/T 1324-2003 (SN/T1324-2003) | | Description (Translated English) | Determination of tin coating mass of electrolytic tinplate for import and export -- Coulometric test method | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | H25 | | Word Count Estimation | 6,692 | | Date of Issue | 2003-08-18 | | Date of Implementation | 2004-02-01 | | Quoted Standard | GB/T 1838; GB/T 2520; GB/T 6682 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China | | Summary | This standard specifies the method for the determination of the import and export of electricity tin plated steel sheet tin test methods. This standard applies to the total tin tin plating steel sheet capacity, the amount of pure tin and tin alloy layer layer tin content. | SN/T 1324-2003: Determination of tin coating mass of electrolytic tinplate for import and export -- Coulometric test method
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Determination of tin coating mass of electrolytic tinplate for import and export -- Coulometric test method
People's Republic of China Entry-Exit Inspection and Quarantine Industry Standard
Test method for tin plating quantity of tin plating plate for import and export
Electricity method
Released on.2003-08-18
2004-02-01 implementation
People's Republic
The General Administration of Quality Supervision, Inspection and Quarantine issued
Foreword
Appendix A of this standard is a normative appendix.
This standard is proposed and managed by the National Certification and Accreditation Administration.
This standard was drafted. Guangdong Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China.
The main drafters of this standard. Wang Hong, Zheng Leiqing, Peng Zhimin, Xiao Ling.
This standard is the first industry standard for entry-exit inspection and quarantine.
Test method for tin plating quantity of tin plating plate for import and export
Electricity method
1 Scope
This standard specifies the test method for determining the tin plating amount of tin-plated steel sheets for import and export.
This standard applies to the total tin plating amount of electroplated tin steel sheets, the tin plating amount of pure tin layers and the tin plating amount of alloy layers.
2 Normative references
The terms in the following documents become the terms of this standard by reference to this standard. All dated references, followed by all
Modifications (not including errata content) or revisions do not apply to this standard, however, parties to agreements based on this standard are encouraged to study
Is it possible to use the latest version of these files? For undated references, the latest edition applies to this standard.
GB/T 1838 tin plated steel plate (belt) tin plating test method
GB/T 2520 cold rolled electroplated tin steel sheet (GB/T 2520-2000, eqv ISO 11949..1995)
GB/T 6682 Analytical laboratory water specifications and test methods
3 Method summary
The tin plating layer was dissolved by passing a constant current through the hydrochloric acid electrolyte with the sample as the anode. Due to the pure tin layer, alloy layer and steel base relative to the reference
The potential of the test electrode is different, so the time required for the dissolution of the pure tin layer and the alloy layer can be obtained by monitoring the potential change of the sample, thereby obtaining the respective
The amount of electricity consumed by total dissolution, according to Faraday's law of electrolysis, the amount of tin in the pure tin layer and the amount of tin in the alloy layer, the sum of the amount of pure tin and the amount of tin in the alloy
That is the total amount of tin plating.
4 reagents
4.1 Water. Meet the requirements of GB/T 6682 Class III water.
4.2 Hydrochloric acid. (1+10) to (1+5), prepared with analytically pure hydrochloric acid (ρ 1.19 g/mL).
4.3 Sodium carbonate solution. 5g/L ~ 10g/L, prepared with analytical reagents.
5 instruments
Electrolytic metal plating thickness analyzer should meet the following requirements.
--- Electrolytic desulphurization current should be able to control at a constant value;
--- Ability to monitor potential changes and accurately record mutation times;
--- The structure and instrument function of the electrolytic desulfurization tank can determine the tin plating amount on both sides of the sample.
6 sample preparation
6.1 Sampling shall be carried out according to the provisions of GB/T 2520 or the agreement, and the sample shall be made into a sample suitable for the test area of the instrument, and the sample shall be flat.
6.2 The surface of the sample should be clean. Surface grease and dirt can be removed with a suitable solvent such as ether; surface oxide and peroxide film
Corrosives can be wiped off with a cleanser or a soft eraser. If necessary, use sodium carbonate solution (4.3) as the electrolyte and stainless steel electrode plate as the anode.
The sample is a cathode, which is treated with a 6V DC power source at a current density of about 80 mA/cm2 for 10 s to 30 s, and the grease is removed to clean the surface of the sample.
7 Instrument calibration
The calibration of the instrument is carried out in accordance with the provisions of Appendix A.
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