GB/T 37204-2018 English PDF (GBT37204-2018)

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GB/T 37204-2018: Electrolyte for vanadium flow battery
GB/T 37204-2018
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.99
H 63
Electrolyte for vanadium flow battery
ISSUED ON: DECEMBER 28, 2018
IMPLEMENTED ON: NOVEMBER 01, 2019
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Requirements ... 4
4 Test methods ... 6
5 Inspection rules ... 8
6 Marks, packaging, transportation, storage and quality certificate ... 9
7 Order sheet (or contract) content ... 10
Annex A (Informative) Determination of vanadium ion content in vanadium electrolyte
... 11
Annex B (Informative) Determination of sulfate content in vanadium electrolyte ... 15
Bibliography ... 18
Electrolyte for vanadium flow battery
1 Scope
This Standard specifies the requirements for electrolyte for vanadium flow battery, test
methods, inspection rules and marks, packaging, transportation, storage and the
contents of quality certificates and order sheets (or contracts).
This Standard applies to electrolyte for vanadium flow battery in sulfuric acid system.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB 190-2009, Packing symbol of dangerous goods
GB/T 6678, General principles for sampling chemical products
GB/T 6680, General rules for sampling liquid chemical products
GB/T 6908-2008, Analysis of water used in boiler and cooling system --
Determination of electrical conductivity
GB/T 10247-2008, Methods of viscosity measurement
GB/T 11901-1989, Water quality. Determination of suspended substance.
Gravimetric method
GB/T 19161-2016, Packaging containers -- Composite intermediate bulk container
GB/T 23942, Chemical reagent -- General rules for inductively coupled plasma
atomic emission spectrometry
GB/T 30903, Inorganic chemicals for industrial use -- Determination of impurity
element -- Inductively coupled plasma mass spectrometry (ICP-MS)
3 Requirements
3.1 Product classification
The products are divided into three varieties according to the different valence states of
11901-1989. It shall be resolved through negotiation between the supplier and the
purchaser.
4.5 Physical properties
4.5.1 The conductivity testing is carried out in accordance with the provisions of 7.3
and 7.5 in GB/T 6908-2008.
4.5.2 The viscosity is tested in accordance with the provisions of Chapter 2 of GB/T
10247-2008. Use the Ubbelohde viscometer specified in A.3 of Annex A of GB/T
10247-2008. Depending on the actual viscosity, select a viscometer with size 0C, 0B or
1 specified in Table A.3 in Annex A of GB/T 10247-2008 for measurement.
5 Inspection rules
5.1 Inspection and acceptance
5.1.1 The product shall be inspected by the supplier to ensure that the product quality
complies with the provisions of this Standard and the order sheet (or contract). A quality
certificate shall be filled out.
5.1.2 The purchaser shall inspect the received products in accordance with the
provisions of this Standard. If the inspection results are inconsistent with the provisions
of this Standard and the order sheet (or contract), a written notification shall be
submitted to the supplier within 30 days from the date of receipt of the product. The
matter shall be resolved through negotiation between the supplier and the purchaser. If
arbitration is needed, it can be entrusted to a unit recognized by both the supplier and
the purchaser. Joint sampling at the purchaser's.
5.2 Batching
Products shall be submitted for acceptance in batches. Each batch shall consist of
products of the same production batch, variety and grade. Each batch shall not exceed
30 m3.
5.3 Inspection item
Before each batch of products leaves the factory, the main component content, impurity
element content, additive content, insoluble impurities, and physical properties shall be
inspected.
5.4 Sampling
5.4.1 To collect the samples for testing the main component content, impurity element
content, additive content and physical properties, determine the number of sampling
units in accordance with the provisions of GB/T 6678. From the selected packaging,
use a suitable sampler that complies with the provisions of GB/T 6680 to take equal
amounts of samples from the upper, middle and lower parts of the packaging. Mix the
removed sample evenly. Divide into 3 clean, dry polyethylene bottles. 1 is for supplier
testing. 1 is for purchaser testing. Keep 1 sealed copy for future reference. Each sample
volume is approximately 500 mL. The sample bottle shall be labeled with the specified
content (according to GB/T 6678).
5.4.2 To collect samples for insoluble impurity testing, randomly select one package
from each batch of products. From the selected packaging, use a suitable sampler that
complies with the provisions of GB/T 6680 to take equal amounts of samples from the
upper, middle and lower parts of the packaging. Mix the taken sample evenly. The
sample volume is approximately 1100 mL.
5.5 Judgment of inspection results
5.5.1 If the content of the main ingredients fails to pass the inspection, the batch of
products will be deemed to be unqualified.
5.5.2 If the impurity element content test fails, the batch of products will be deemed
unqualified.
5.5.3 If the test of insoluble impurities fails, the batch of products will be deemed
unqualified.
6 Marks, packaging, transportation, storage and quality
certificate
6.1 Marks
The following marks (or labels) shall be printed on the outer packaging of the
electrolyte:
a) Name of supplier;
b) Product name;
c) Product batch number;
d) Reference to this Standard;
e) The product packaging shall be marked with the "Corrosive substances" that
complies with the provisions of GB 190-2009.
6.2 Packaging, transportation and storage
6.2.1 Products shall be stored in plastic containers that are resistant to sulfuric acid
Annex A
(Informative)
Determination of vanadium ion content in vanadium electrolyte
A.1 Scope
This appendix specifies the method for determination of vanadium ion content in
vanadium electrolyte. The measurement range of positive trivalent vanadium ion
content is 0.00 mol/L~2.50 mol/L. The measurement range of positive tetravalent
vanadium ion content is 0.00 mol/L~2.50 mol/L.
A.2 Principle
There are two adjacent valence states of vanadium ions in the electrolyte solution.
Based on the redox reaction between potassium permanganate and low-valent
vanadium, in a phosphate buffer solution, the electrolyte sample is titrated with a
standard titration solution of potassium permanganate, and the low-valent vanadium
ions are gradually oxidized until they are pentavalent. Each sudden jump in potential
corresponds to a change in the valence state of vanadium. According to the consumed
volume of potassium permanganate standard solution corresponding to the potential
jump point, calculate the content of vanadium ions in each valence state and total
vanadium.
A.3 Reagents and materials
The reagents and water used in this appendix, unless otherwise specified, shall be
reagents confirmed to be analytically pure and water that meets the requirements for
...