GB/T 42436-2023 English PDF (GB/T42436-2023)

GB/T 42436-2023: Additives for vehicular M100 methanol fuel
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GB/T 42436-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 75.160.20
CCS E 31
Additives for Vehicular M100 Methanol Fuel
ISSUED ON: MAY 23, 2023
IMPLEMENTED ON: SEPTEMBER 1, 2023
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 Terms and Definitions ... 5
4 Technical Requirements and Test Methods ... 6
5 Inspection Rules ... 7
6 Marking, Packaging, Transportation, and Storage ... 8
7 Safety ... 9
Appendix A (Normative) Test Method of Rust resistance (Rust Degree) of Aluminum
Sheet ... 10
Appendix B (Normative) Test Method for Relevant Indicators of Engine Bench Test
... 15
Additives for Vehicular M100 Methanol Fuel
1 Scope
This Document specifies the technical requirements, test methods, inspection rules, marking,
packaging, transportation, storage and safety of additives for vehicular M100 methanol fuel.
This Document is applicable to the production and inspection of additives for vehicular M100
methanol fuel.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
GB/T 191 Packaging – Pictorial marking for handling of goods
GB/T 261 Determination of flash point – Pensky-Martens closed cup method
GB/T 338-2011 Methanol for industrial use
GB/T 508 Petroleum products – Determination of ash
GB/T 511 Petroleum products and additives – Determination of mechanical impurity
GB/T 514 Specification for liquid-in-glass thermometers for testing of petroleum products
GB/T 3190 Chemical composition of wrought aluminum and aluminum alloys
GB/T 3535 Petroleum products – Determination of pour point
GB/T 4756 Petroleum liquids – Manual sampling
GB/T 6324.9 Test methods of organic chemical products - Part 9: Determination of
chloride
GB/T 6682 Water for analytical laboratory use – Specification and test methods
GB/T 7304 Petroleum products and lubricants – Determination of acid number –
actual batch of continuous production of the product is regarded as a batch, but the time for
several production batches to form an inspection batch shall not exceed one week.
5.1.2 Sampling shall be carried out in accordance with the provisions of GB/T 4756; and the
sample size shall be no less than the type inspection amount for inspection and sample retention.
5.2 Exit-factory inspection
This product shall be conducted exit-factory inspection. Only after passing the inspection and
issuing the inspection report can it leave the factory. The exit-factory inspection items include
appearance, pour point, flash point (closed), nitrogen content, phosphorus content, sulfur
content, organic chlorine content, ash content (mass fraction) in Table 1.
5.3 Type inspection
The type inspection items are all the items specified in Table 1; and the sampling shall be carried
out among the products that have passed the exit-factory inspection. In the case of normal
production, the type inspection shall be carried out at least once a year. In one of the following
situations, type inspection shall also be carried out:
a) When a new product is put into production or when the product is finalized and identified;
b) When raw materials, formulations or production processes changes, it shall affect product
quality;
c) When the production is resumed after continuous shutdown for more than 3 months;
d) When there is a change in the main raw material supplier, which may affect the product
quality;
e) When there is a large difference between the exit-factory inspection result and the last
type inspection result.
5.4 Judgement of results
The test results shall be carried out according to the rounded-off value comparison method in
GB/T 8170. If one of the test results fails to meet the requirements, the barreled products shall
be re-sampled and inspected from twice the number of packaging units; and the canned products
shall be re-sampled and inspected at multiple points. If the re-inspection results still have
unqualified items, the entire batch of products shall be determined to be unqualified.
6 Marking, Packaging, Transportation, and Storage
6.1 The product packaging container shall be painted with firm signs, the contents of which
include but are not limited to:
Appendix A
(Normative)
Test Method of Rust resistance (Rust Degree) of Aluminum Sheet
A.1 Summary of method
Under the condition of (38±1) ℃, completely immerse the aluminum sheet in a mixture of
30mL of methanol, 0.5% formic acid, 0.5% distilled water and 0.5% additive for vehicular
M100 methanol fuel. Conduct a 15h test to observe the rust marks and the degree of rust on the
aluminum sheet.
A.2 Instruments and equipment
A.2.1 Test tubes
Made of borosilicate glass, the outer diameter is 25mm, the length is 150mm, and the wall
thickness is 1mm~2mm. The internal dimensions shall be such that the test aluminum sheet can
be properly accommodated. When 30mL of the specimen liquid and the aluminum sheet
immersed in it are placed in the test tube, the surface of the specimen liquid shall be at least
5mm higher than the upper surface of the aluminum sheet.
A.2.2 Test tube bath
The test tube bath shall be equipped with a suitable stand to support each test tube so that it is
in a vertical position in the bath and the test tube is immersed in the bath to a depth of about
100mm (the distance from the bottom of the test tube to the surface of the bath). Either water
or oil can be used as the test tube bath medium.
A.2.3 Temperature measuring device
It can stably monitor the test temperature of the test tube bath, and the measurement accuracy
is ±1 ℃ or higher. GB-48 total immersion thermometer in GB/T 514 meets the requirements of
this method. When using this thermometer, the height of the mercury column exposed to the
surface of the bath medium at the test temperature shall be no greater than 10mm.
A.2.4 Grinder fixture
The grinder fixture shall firmly clamp the aluminum sheet without damaging its edge, so that
the surface of the aluminum sheet to be polished can be higher than the surface of the fixture,
and any of such fixture can be used as a grinder fixture.
A.2.5 Tweezers
Tips are stainless steel or PTFE for gripping aluminum sheets.
A.4.1 Surface preparation
A.4.1.1 First use 00# or finer steel wool (cotton), or silicon carbide (aluminum oxide corundum)
sandpaper or emery cloth with an appropriate particle size that can effectively achieve the
desired effect, to remove the erosion left on the 6 surfaces of the aluminum sheet from the
previous test. Further treatment with 65μm (p220) silicon carbide sandpaper or emery cloth to
remove sanding marks left by other grades of sandpaper. Before final grinding, it shall be
ensured that the aluminum sheet that has completed the surface preparation is no longer
oxidized. After the metal shavings on the aluminum sheet can be wiped off with quantitative
filter paper, the aluminum sheet is soaked in the washing solvent. The aluminum sheet can then
be taken out for immediate final polishing, or can be stored in the washing solvent for later use.
A.4.1.2 Manual procedures for surface preparation: place a piece of silicon carbide or aluminum
oxide (corundum) sandpaper or emery cloth on a flat surface, and moisten the sandpaper or
emery cloth with washing solvent. Rub the aluminum sheet against sandpaper or emery cloth
in a rotating manner. When taking out the aluminum sheet, use ash-free filter paper for
protection or wear disposable gloves to prevent the aluminum sheet from coming into contact
with fingers. Another method is to install dry sandpaper or emery cloth of appropriate grain size
on a motor-driven machine, and use the machine to treat the surface of the aluminum sheet.
A.4.2 Polishing
For the new aluminum sheet prepared in A.4.1 or used for the first time, take it out of the storage
place (such as from the washing solvent); in order to prevent the surface of the aluminum sheet
from being polluted at the end of the polishing stage, direct contact aluminum sheet with fingers
is not allowed, disposable gloves shall be worn or protected with ash-free filter paper. Use a
piece of absorbent cotton moistened with the washing solvent, dip some 105μm (p150) silicon
carbide or alumina (corundum) sand grains; first polish each end edge of the aluminum sheet;
then polish the side; and then wipe vigorously with a new absorbent cotton ball. During the
subsequent processing, the fingers shall not touch the surface of the aluminum sheet, and the
aluminum sheet can be held with tweezers. The aluminum sheet is clamped on the grinder
fixture, and the main surface of the aluminum sheet is polished with absorbent cotton dipped in
silicon carbide or alumina (corundum) sand grains. Rotary motion shall not be used when
grinding, and grinding shall be done back and forth along the long axis of the aluminum sheet.
Before turning back in the direction, the grinding stroke shall exceed the end of the aluminum
sheet. Rub the aluminum piece vigorously with a clean piece of absorbent cotton to remove all
metal shavings until no more marks remain when wiped with a new piece of absorbent cotton.
Immediately after the aluminum sheet is wiped clean, it is immersed in the prepared specimen.
A.5 Test procedures
A.5.1 Specimen preparation
The specimen shall be prepared according to the ratio of methanol to 0.5% formic acid and 0.5%
distilled water (blank test); methanol to 0.5% formic acid, 0.5% distilled water and 0.5%
additive for vehicular M100 methanol fuel by mass fraction.
A.5.2 Test procedures
Pour 30mL of the specimen into a clean, dry test tube. After completing the final grinding
procedure of the aluminum sheet, slide the aluminum sheet into the test tube and dip into the
specimen. Stopper the test tube with a cork. If more than one specimen to be tested is
determined at the same time, it is allowed to prepare each specimen one by one, as long as the
interval between the first and the last specimen is kept to a minimum. Plug each test tube one
by one with a stopper; and then immerse each test tube in a bath at (38±1) °C. During the test,
strong light shall be prevented from irradiating the contents of the test tube to prevent the
stopper from falling off. After the test tube is placed in the bath for 15h±5min, take out the test
tube; take out the aluminum sheet with tweezers; let it drip dry; and then clean it with petroleum
ether.
A.6 Judgment of results
A.6.1 After the test, observe under natural light (illuminance about 650 lx), if any rust spots or
rust marks can be observed, it is judged as rust; wipe the surface with lint-free cotton cloth or
toilet paper, if there are pits or the surface is rough, it shall be judged as rust.
A.6.2 In order to report whether the test sample is qualified or not, parallel tests shall be carried
out. If, at the end of the test, both aluminum sheets are corroded, the test sample is reported to
have failed the test. If one aluminum sheet is corroded and the other is not corroded, then test
the two aluminum sheets again; in the retest test, if the neither the two aluminum sheets are
corroded, report that the test sample has passed the test.
A.6.3 The degree of rust is observed under natural light, and the classification is as follows:
--- Mild corrosion: there are no more than 6 rust spots, and the diameter of each rust spot is
less than 1mm;
--- Moderate corrosion: more than 6 rust points, but less than 5% of the surface area of the
test piece;
--- Severe corrosion: the rust spots exceed 5% of the surface area of the test piece.
A.6.4 The retest test shall be carried out with new aluminum sheets.
A.7 Report
The report should contain the following:
a) Inspection organization;
b) The inspected organization;
B.1.2 The engine bench and measurement and control system can accurately control the test
boundary conditions and engine operating conditions, and collect test data as required.
B.1.3 The working cycle of the engine consists of two working conditions. In the first working
condition, the engine speed is 5600r/min, the engine torque is 14.3N•m, and it runs for 20 min;
in the second working condition, the engine speed is 4200r/min, the engine torque is 14.3 N•m,
and it runs for 10 min. The transition time between the two working conditions is 15s; a
complete cycle time is 30min, the engine runs 240 cycles, and runs for a total of 120h.
B.2 Test equipment
B.2.1 Test site
B.2.1.1 Engine test site
There shall be engine exhaust system and ventilation system for cooling to facilitate the control
of air inlet parameters.
B.2.1.2 Methanol nozzle test site
The temperature and humidity of the nozzle flow measurement place shall be maintained at a
relatively constant and appropriate level.
B.2.1.3 Total combustion deposit collection site
The sediment is sensitive to the environment; and the humidity and temperature of the sediment
collection site shall be maintained at a relatively constant and appropriate level.
B.2.2 Test bench
B.2.2.1 General layout of the stand
The engine is connected to the dynamometer through an elastic coupling, and the engine angle
is arranged according to the state of the entire vehicle. Engine accessories include generator
and air compressor (no-load state); the generator shall be connected to the battery, and the
battery only supplies power to the engine management system (EMS).
B.2.2.2 Dynamometer and control system
The dynamometer and control system used in the test shall meet the requirements of test
parameters and working conditions in Table B.2.
The engine cooling system shall be able to control the coolant outlet temperature and flow
according to the requiremen...