GB 24409-2020Limit of Harmful Substances of Vehicle Coatings (English PDF)

3.1 Road Vehicle

Road vehicle refers to vehicles that are designed and manufactured to carry

passengers, transport goods or perform special operations on the road, and are legally

allowed to travel on the road. Road vehicle includes motor vehicles and non-motor

vehicles.

[GA 802-2014, Definition 3.1]

3.2 Rail Transit Vehicle

Rail transit vehicle refers to a means of transportation that needs to travel on a specific

track. Rail transit vehicle includes powered car train-sets, passenger cars (railway

vehicle), urban rail transit vehicles and wagons, etc.

3.3 Power-driven Vehicle

Power-driven vehicle refers to a wheeled vehicle that is driven or towed by a power

device, and travels on the road to carry passengers or transport goods, and for special

engineering operations. Power-driven vehicle includes cars, car trains, motorcycles,

tractor transport units, special wheeled mechanical vehicles and trailers.

[GB 7258-2017, Definition 3.1]

3.4 Passenger Car

Passenger car refers to a car that is designed and manufactured mainly to carry

passengers and their carry-on luggage and / or temporary items. Passenger car has

no more than 9 seats, including the driver's seat. It can be equipped with certain

special-purpose equipment or appliances; it can also tow a central axle trailer.

[GB 7258-2017, Definition 3.2.1.1]

3.5 Bus (vehicle)

Bus (vehicle) refers to a car designed and manufactured mainly to carry passengers

and their carry-on luggage. Bus (vehicle) has no more than 9 seats, including the

driver's seat. Based on whether there is a passenger standing area, it is divided into

bus with passenger standing area and bus without passenger standing area.

[GB 7258-2017, Definition 3.2.1.3]

3.6 Goods Vehicle

Goods vehicle refers to a car designed and manufactured mainly to transport goods or

tow trailers. It also includes.

a) Motor vehicles equipped with special-purpose equipment or appliances, but

with the main purpose of transporting goods;

b) Motor vehicles modified from non-enclosed trucks; although they are

equipped with special-purpose equipment or appliances, they do not belong

to special operation vehicles.

NOTE. enclosed truck refers to a goods vehicle whose load-bearing part structure is

a closed compartment and linked with the driving cab, and the body structure

is a one-compartment or two-compartment type.

5.1 Except for special functional coatings, the limit value of VOC content in the various

types of vehicle coatings shall comply with the requirements of Table 1, Table 2 and Table 3.

NOTE. special functional coatings refer to primers for polypropylene substrates (including

PP water), erosive primers, auxiliary materials that eliminate traces at the junction

of old and new coatings (connecting water deduction), primer surfacer for

refinishing the electrophoretic layer, anti-rock (resistant) coating [coating without

auxiliary anti-rock (resistant) function], high-temperature resistant coating for

automobile engine and exhaust pipe, polytetrafluoroethylene coating sintered into

films at a high temperature above 150 °C (special functions like chemical

resistance, wear resistance, lubrication and non-stickiness), lubricating coating for

elastomers, silver plating effect paints, self-spraying tank refinish paints and

marking paints, etc.

In the test of VOC content in water-based coatings and water-based radiation-curing

coatings, the dilution ratio of water is not considered. Other types of coatings shall be

measured after mixing in accordance with the application ratio under the expressly

indicated application condition. If the usage of a certain component in a multi-

component is within a certain range, it shall be determined after mixing in accordance

with the maximum ratio specified in the application ratio under the product application

condition.

5.2 The limit values of the content of other harmful substances, except VOC content,

in the various types of vehicle coatings, shall comply with the requirements of Table 4.

6.1 Sampling

Products shall be sampled in accordance with the stipulations of GB/T 3186,

6.2 Test Methods

6.2.1 VOC content

6.2.1.1 Density

In accordance with the stipulations of GB/T 6750-2007, conduct the test. The test

temperature is (23 +/- 0.5) °C.

6.2.1.2 Gloss

In accordance with the stipulations of GB/T 9754-2007, conduct the test. Use a wet

film preparation device with a groove depth of (100 +/- 2) µm to prepare a sample on

black glass or a flat glass plate pre-coated with matte black paint on the back. The

baking condition is (105 +/- 2) °C/1h; use a 60° specular gloss meter for the test.

6.2.1.3 VOC content in water-based coatings

Firstly, in accordance with the stipulations of Appendix A, determine the moisture

content in water-based coatings.

6.2.2 Total content of benzene content, toluene and xylene (containing ethylbenzene)

In accordance with the stipulations of Method A in GB/T 23990-2009, conduct the test.

The calculation of benzene content, toluene and xylene (containing ethylbenzene)

content shall comply with 8.4.3 in GB/T 23990-2009.

6.2.3 Total content of benzene series

In accordance with the stipulations of Method B in GB/T 23990-2009, conduct the test.

The calculation of benzene series content shall comply with 9.4.3 in GB/T 23990-2009;

convert it to be expressed in mass fraction (%).

6.2.4 Total content of halogenated hydrocarbon

In accordance with the stipulations of GB/T 23992-2009, conduct the test. The

calculation of halogenated hydrocarbon content shall comply with 8.5.2 in GB/T 23992- 2009.

6.2.5 Total content of glycol ethers and ether esters

In accordance with the stipulations of GB/T 23986-2009, conduct the test. The

calculation of glycol ethers and ether esters shall comply with 10.2 in GB/T 23986-

2009; convert it to be expressed in (mg/kg).

6.2.6 Heavy metal content

The determination of lead (Pb) content, cadmium (Cd) content and mercury (Hg)

content shall be conducted in accordance with the stipulations of GB/T 30647-2014.

In terms of the determination of hexavalent chromium (Cr6+) content, firstly, in

accordance with the stipulations of GB/T 30647-2014, determine the total chromium

content in the sample. Then, in accordance with the stipulations of Appendix B, conduct

the test.

7.1 Type Inspection

7.1.1 Under normal production, type inspection shall be conducted at least once a year.

Type inspection items include all the requirements listed in this Standard.

7.1.2 Under one of the following circumstances, type inspection shall be conducted at any time.

7.2 Determination of Inspection Result

7.2.1 The determination of the inspection result shall be conducted in accordance with

the rounding-off comparison method in GB/T 8170-2008.

7.2.2 When reporting the inspection result, the application ratio under the expressly

indicated application condition shall be simultaneously indicated.

7.2.3 When the inspection results of all items meet the requirements of this Standard,

then the products comply with the requirements of this Standard.

8.1 The packaging marks shall comply with the stipulations of GB/T 9750.In addition,

products that pass the inspection in accordance with this Standard may be expressly

indicated on the packaging marks.

8.2 The packaging marks or product specification shall expressly indicate the

application ratio under the application condition.

8.3 The packaging marks or product specification shall indicate the classification,

category and type (or application mode) of products that comply with this Standard.