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GB 24409-2020 PDF English

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GB 24409-2020: Limit of Harmful Substances of Vehicle Coatings
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GB 24409: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] deliveryName of Chinese StandardStatus
GB 24409-2020English225 Add to Cart 0-9 seconds. Auto-delivery Limit of Harmful Substances of Vehicle Coatings Valid
GB 24409-2009English140 Add to Cart 0-9 seconds. Auto-delivery Limit of harmful substances of automobile coatings Obsolete

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GB 24409-2020: Limit of Harmful Substances of Vehicle Coatings

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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

Foreword

All the technical content of this Standard is mandatory. This Standard was drafted in accordance with the rules in GB/T 1.1-2009. This Standard serves as a replacement of GB 24409-2009 Limit of Harmful Substances of Automobile Coatings. In comparison with GB 24409-2009, other than editorial modifications, the main technical changes are as follows. ---The scope of application of this Standard is modified (see Chapter 1; Chapter 1 of Version 2009); ---Normative reference “GB/T 1250” is deleted; normative references “GB/T 8170- 2008, GB/T 9754-2007, GB/T 9758.5-1988, GB/T 9760-1988, GB/T 23985- 2009, GB/T 23986-2009, GB/T 23990-2009, GB/T 23992-2009, GB/T 30647- 2014, GB/T 34675-2017” are added (see Chapter 2; Chapter 2 of Version 2009); ---The definitions of “volatile organic compound” and “volatile organic compound content” are modified; the terms and definitions of “road vehicle”, “rail transit vehicle”, “power-driven vehicle”, “passenger car”, “bus (vehicle)”, “goods vehicle”, “powered car train-set”, “railway vehicle”, “carriage (railway vehicle)”, “urban rail transit vehicle”, “wagon”, “special motor vehicle”, “low-speed vehicle”, “trailer”, “primer”, “primer surfacer”, “varnish”, “effect pigment”, “high decorative coatings including effect pigment” and “application condition” are added (see Chapter 3; Chapter 3 of Version 2009); ---The classification of products is modified (see Chapter 4; Chapter 4 of Version 2009); ---The “coating variety” of solvent-based coatings is modified; the limit value of VOC content is modified (see Table 2; Table 1 of Version 2009); ---The limit value of VOC content of water-based coatings and radiation-curing coatings is added (see Table 1 and Table 3); ---The limit value of the total content of toluene and xylene (containing ethylbenzene) in solvent-based coatings is modified; the control item of the total content of halogenated hydrocarbons in solvent-based coatings is added (see Table 4; Table 1 of Version 2009); ---The control item of the total content of benzene series in water-based coatings and water-based radiation-curing coatings is added (see Table 4); ---The control items of the benzene content, the total content of toluene and xylene (containing ethylbenzene), the total content of halogenated hydrocarbons, and the total content of glycol ethers and ether esters of non-aqueous radiation- curing coatings are added (see Table 4); ---The control varieties of glycol ethers and ether esters are modified (see Chapter 5; Chapter 5 of Version 2009); ---The test methods of “VOC content”, “benzene content”, “total content of toluene and xylene (containing ethylbenzene)”, “total content of glycol ethers and ether esters” and “heavy metal content” are modified; the test methods of “total content of benzene series” and “total content of halogenated hydrocarbons” are added (see 6.2; 6.2 of Version 2009); ---The implementation of this Standard is added (see Chapter 9). This Standard was proposed by and shall be under the jurisdiction of Ministry of Industry and Information Technology of the People’s Republic of China. The issuing of the previous version. ---GB 24409-2009. 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 & 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. [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.

4 Product Classification

In this Standard, vehicle coating is divided into. water-based coating, solvent-based coating, radiation-curing coating and powdered coating.

5 Requirements

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 Test Methods

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 Inspection Rules

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 Packaging Marks

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.

9 Implementation of Standard

When conducting spot-check of the coating products under the application condition on the site of coating, the sampling inspection of multi-component cured coatings, such as polyurethanes and epoxy resins, shall be conducted within the period of application. ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.


      

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