|
US$229.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 28290-2012: Methods for determination of surface chromium on electrolytic tinplate
Status: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 28290-2012 | English | 229 |
Add to Cart
|
3 days [Need to translate]
|
Methods for determination of surface chromium on electrolytic tinplate
| Valid |
GB/T 28290-2012
|
PDF similar to GB/T 28290-2012
Basic data | Standard ID | GB/T 28290-2012 (GB/T28290-2012) | | Description (Translated English) | Methods for determination of surface chromium on electrolytic tinplate | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H25 | | Classification of International Standard | 77.140.01 | | Word Count Estimation | 10,140 | | Quoted Standard | GB/T 8170 | | Regulation (derived from) | National Standards Bulletin No. 9 of 2012 | | 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 use colorimetric determination of electrolytic tin plate surface chromium plating principle, reagents, test device, specimen, test conditions and procedures, test results, calculations, test reports. This standard applies to el | GB/T 28290-2012: Methods for determination of surface chromium on electrolytic tinplate---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Methods for determination of surface chromium on electrolytic tinplate
ICS 77.140.01
H25
National Standards of People's Republic of China
Test Method for Chromium Content of Electroplated Tin Plates
2012-05-11 release
2013-02-01 Implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Management Committee released
Foreword
The colorimetric method in this standard refers to ASTMA623M-08 "tinplate standard specification" Appendix A7 to develop, an increase of electrolysis.
Compared with ASTMA623M-08 Appendix A7, the main changes in this standard are.
--- Added terms and definitions;
--- increased the principle;
--- increase the sample;
- the calibration of the spectrophotometer part of the calibration curve to add the technical content;
- the calculation of the test results to add the contents of the numerical revision.
This standard is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183).
The drafting of this standard. Wuhan Iron and Steel (Group) Company, Metallurgical Industry Information Standards Institute.
The main drafters of this standard. single Kaijun, Li Xiaojie, Liu Baoshi, Huang Baihua, Hou Jie, Yu Wenli, Chen Xiaohong.
Test Method for Chromium Content of Electroplated Tin Plates
1 Scope
This standard specifies the principle of colorimetric method, electrolysis method to determine the chromium content of electroplated tin plate, reagents, test equipment, samples, test conditions and
Steps, the calculation of test results, test reports and so on.
This standard is applicable to the determination of chromium content on the surface of electroplated tin plate. Color method as an arbitration law. Electrolysis method is recommended as a quick method
The surface chromium content is not less than 2 mg/m2.
2 normative reference documents
The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article
Pieces. For undated references, the latest edition (including all modifications) applies to this document.
Representation and Judgment of Numerical Correction Rule and Limit Value of GB/T 8170
3 terms and definitions
The following terms and definitions apply to this document.
3.1
Electroplated tinplate surface of chrome surfacechromiumonelectrolytictinplate
In order to improve the corrosion resistance of tinplate, tin plating after the passivation treatment, in the tin plating surface deposition of chromium.
4 colorimetric method
4.1 Principles
Dissolving the passivation film on the surface of the electroplated tin plate with a mixed solution of sodium hydroxide and sodium phosphate; dissolving the chromium oxide in the passivation film with potassium permanganate solution
Into the hexavalent; with diphenylcarbazide solution color, with colorimetric determination of chromium, divided by the sample surface area, that is, per unit area
The amount of chromium.
4.2 Reagents
4.2.1 Reagent and water purity. This test uses pure reagent and distilled water, or pure water of comparable purity.
4.2.2 Sodium hydroxide (NaOH) - sodium phosphate (Na3PO4) solution. Weigh 40.0 g of sodium hydroxide and 50.0 g of sodium phosphate into the water, dilute
Released to 1.0L.
4.2.3 sulfuric acid (H2SO4) solution (1 3). take 100mL concentrated sulfuric acid (ρ1.84g/mL) slowly add 300mL of water, shake.
4.2.4 Potassium permanganate (KMnO4) saturated solution.
4.2.5 Hydrochloric acid (HCl, ρ1.19g/mL).
4.2.6 Diphenylcarbazide (C13H14N4O) solution. Weigh 0.2 g of diphenylcarbazide, dissolve in 10.0 mL of acetone, 10.0 mL
Ethanol (95%) of 10.0 mL of phosphoric acid (85%), 10.0 mL of water. Preparation before use; once the color should be re-prepared.
4.2.7 Chromium standard solution A (chromium content 0.5mg/mL). Weigh 1.4140g potassium dichromate (K2Cr2O7) into the water, diluted to 1.0L.
4.2.8 chromium standard solution B (chromium content 0.01mg/mL). with a pipette to absorb 20mL standard solution A into the volumetric flask, with water dilute
Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 28290-2012_English be delivered?Answer: Upon your order, we will start to translate GB/T 28290-2012_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time. Question 2: Can I share the purchased PDF of GB/T 28290-2012_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 28290-2012_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. If you need your currency to be printed on the invoice, please write an email to [email protected]. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.
|