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GB 24409-2020: Limit of harmful substances of vehicle coatings
GB 24409-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 87.040
G 51
Replacing GB 24409-2009
Limit of Harmful Substances of Vehicle Coatings
ISSUED ON: MARCH 4, 2020
IMPLEMENTED ON: DECEMBER 1, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative References ... 5 
3 Terms and Definitions ... 6 
4 Product Classification ... 10 
5 Requirements ... 10 
6 Test Methods ... 16 
7 Inspection Rules ... 18 
8 Packaging Marks ... 19 
9 Implementation of Standard ... 19 
Appendix A (normative) Determination of Moisture Content - Gas
Chromatography ... 20 
Appendix B (normative) Determination of Hexavalent Chromium (Cr6+) Content
- Spectrophotometry ... 24 
Bibliography ... 31 
Limit of Harmful Substances of Vehicle Coatings
1 Scope
This Standard stipulates the product classification, requirements, test methods,
inspection rules, packaging marks and implementation of the Standard related to the
allowable limits of substances harmful to humans and the environment in various types
of vehicle coatings.
This Standard is applicable to various kinds of original vehicle coatings, refinish
coatings, rail transit vehicle coatings, motorcycle (including electric motorcycle)
coatings, bicycle (including electric bicycle) coatings, and coatings for other vehicles
(special motor vehicles, low-speed vehicles and trailers) and vehicle parts.
This Standard is not applicable to coatings for tractor transport units, special wheeled
mechanical vehicles and military vehicles.
2 Normative References
The following documents are indispensable to the application of this document. In
terms of references with a specified date, only versions with a specified date are
applicable to this document. In terms of references without a specified date, the latest
version (including all the modifications) is applicable to this document.
GB/T 1725-2007 Paints, Varnishes and Plastics - Determination of Non-volatile-matter
Content
GB/T 3186 Paints, Varnishes and Raw Materials for Paints and Varnishes - Sampling
GB/T 6682-2008 Water for Analytical Laboratory Use - Specification and Test Methods
GB/T 6750-2007 Paints and Varnishes - Determination of Density - Pycnometer
Method
GB/T 8170-2008 Rules of Rounding off for Numerical Values and Expression and
Judgement of Limiting Values
GB/T 9750 Marks for Package of Coating Products
GB/T 9754-2007 Paints and Varnishes - Determination of Specular Gloss of Non-
metallic Paint Films at 20°, 60° and 85°
GB/T 9758.5-1988 Paints and Varnishes - Determination of Soluble Metal Content -
Part 5: Determination of Hexavalent Chromium Content of the Pigment Portion of the
Liquid Paint or the Paint in Powder Form - Diphenylcarbazide Spectrophotometric
Method
GB/T 9760-1988 Paints and Varnishes - Preparation of Acid Extracts from Paints in
Liquid or Powder Form
GB/T 23986-2009 Paints and Varnishes - Determination of Volatile Organic Compound
(VOC) Content - Difference Method
GB/T 23990-2009 Determination of the Contents of Benzene Toluene Ethylbenzene
and Xylene in Coatings by Gas Chromatography
GB/T 23992-2009 Determination of Chlor-hydrocarbon Content in Coatings - Gas
Chromatographic Method
GB/T 30647-2014 Determination of Harmful Elements Total Content of Coatings
GB/T 34675-2017 Determination of Volatile Organic Compound (VOC) Content in
Radiation Curable Coatings
3 Terms and Definitions
The following terms and definitions are applicable to this document.
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.
transportation tool that is, in principle, grouped to be used in passenger trains and
freight trains.
[GB/T 4549.1-2004, Definition 2.1]
3.9 Carriage; Passenger Car; Coach
Railway Vehicle
Carriage (railway vehicle) refers to a vehicle used to transport passengers and operate
for this service, or, in principle, grouped to be used in passenger trains.
[GB/T 4549.1-2004, Definition 2.2]
3.10 Urban Rail Transit Vehicle
Urban rail transit vehicle refers to a public transport mode with the vehicle
transportation system that adopts a track structure for load-bearing and guidance; in
accordance with the requirements of the overall planning of urban transportation, it
sets up fully enclosed or partially enclosed exclusive track lines, and transports a large-
scale passenger flow in the form of trains or single vehicles. Urban rail transit vehicle
includes subway system, light rail system, monorail system, tram car, maglev system,
automatic guide rail system and city rapid rail system.
3.11 Wagon; Freight Car
Wagon (freight car) refers to vehicle that is used to transport goods and serve for this
purpose, or in principle, grouped to be used in freight trains. By purpose, it can be
divided into general wagons and special-purpose wagons.
[GB/T 4549.1-2004, Definition 2.37]
3.12 Special Motor Vehicle
Special motor vehicle refers to vehicle that is equipped with special-purpose equipment
or appliances, and designed and manufactured to be used for special engineering
operations (including health and medical treatment), such as: truck cranes, fire trucks,
concrete pump trucks, wreckers, aerial work vehicles, road sweeping trucks, sewage
suction trucks, rig trucks, instrument trucks, inspection vehicles, monitoring vehicles,
power supply vehicles, communication vehicles, television vehicles, blood collection
vehicles, medical treatment vehicles and medical examination vehicles, etc. However,
it does not include vehicles equipped with special-purpose equipment or appliances,
and more than 9 seats (including the driver’s seat) (except fire trucks).
[GB 7258-2017, Definition 3.2.3]
3.13 Low-speed Vehicle
interference in a thin layer), with different colors (color change, color jump and color
shade change) or texture.
[GB/T 5206-2015, Definition 2.91]
3.22 High Decorative Coatings Including Effect Pigment
High decorative coatings including effect pigment refers to a type of coating that
contains effect pigment, and whose coated orange peel value in the medium long wave
is ≤ 15 and short wave is ≤ 25.
3.23 Volatile Organic Compound
VOC
Volatile organic compound refers to organic compound participating in atmospheric
photochemical reactions, or organic compound determined in accordance with
relevant regulations.
3.24 Volatile Organic Compound Content
VOC Content
Volatile organic compound content refers to the mass of volatile ...