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GB 24409-2009 PDF in English

GB 24409-2009 (GB24409-2009) PDF English
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GB 24409-2009: PDF in English

ICS 87.040
G 51
Limit of Harmful Substances of
Automobile Coatings
Jointly issued by. General Administration of Quality Supervision,
Inspection and Quarantine of the People’s Republic
of China;
Standardization Administration of the People’s
Republic of China.
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Foreword ... II
1 Scope ... 1
2 Normative reference documents ... 1
3 Terms and Definitions ... 1
4 Product category ... 2
5 Requirement ... 2
6 Test method ... 4
7 Test rule ... 4
8 Packing mark ... 5
Annex A (Normative) Test of volatile organic compounds (VOC) content ... 6
Annex B (Normative) Tests of benzene, toluene, ethylbenzene, xylene, glycol ether and ether
ester in solvent based coating ——Gas chromatography method ... 11
Annex C (Normative) Content test of glycol ether and ether ester in water paint——Gas
chromatography method ... 14
Annex D (Normative) Content test of led, cadmium, mercury ... 18
Annex E (Normative) Content test of sexavalent chrome ... 23
All the technical contents in this standard are compulsory.
Annex A, Annex B, Annex C, Annex D, Annex E in this standard are normative annexes.
This standard is presented by the China Petroleum and Chemical Industry Association.
This standard is under the centralized management of National Technical Committee of
Paints & Pigments for Standardization.
The main drafting organizations of this code. CNOOC Changzhou Paint & Coatings
Industry Research Institute, Chery Automobile Co., Ltd., FAW Research & Development
Center, BASF Coatings International Trade (Shanghai),AkzoNobel Sikkens Car Refinishes
(Suzhou) Co., Ltd., Hunan Kansai Automotive Coating Co.,Ltd, Jiangsu Hongye Coatings
Co.,Ltd, Hangzhou Unires Chemical Co.,Ltd, Shenzhen Pinefield Chemical Enterprises
Co.,Ltd, Fujian Xin Zhan Wang Group Co., Ltd., Changzhou Planet Coatings Co.,Ltd, Jiangsu
Baihe Coatings Co.,Ltd, Jiangsu Haoyue Coatings Co.,Ltd, Shenzhen Centre Testing
International Corporation.
The chief drafing staff of this code. Tang Ying, Chen Yuezhen, Li Daming, Zhang
Guozhong, Song Hua, Li Feng, Fu Qing, Yang Pengfei, Yu Xinli, Wang Songxian, Zhang
Dingde, Zhan Jianxin, Xue Fang, Bao Boqing, Jiang Chun, Guo Yong.
Limit of Harmful Substances of
Automobile Coatings
1 Scope
This standard specifies the requirements, test method, test rules and packing mark of
harmful-substance permissible limit in original coating, repair coating and spare coating used
on passenger car, commercial car, trailer, road train for human and environment.
This standard is applicable to all kinds of automobile coatings except putty and coating
with special function.
Note. in this standard the coatings with specific function are referred to the polypropylene-ground adhesion accelerant (PP
water), the anti (resistant)-stone-bumping coating [except the auxiliary anti (resistant)-stone-bumping coating], the auxiliary
material (joint water) to remove marks on the joint of new and old films, etc.
2 Normative reference documents
The terms of the following documents in the passage of this standard become the terms
of this standard. Note the date of any reference document, and its subsequent amendments all
alone (not including the contents of errata) or revised edition are not applicable to this
standard, however, under this standard to encourage the parties to reach an agreement to
explore the possibility of using the latest version of these documents. Note the dates are not
cited documents; the latest version applies to this standard.
GB/T1250 Rules for expression and judgment of limiting values
GB/T1725—2007 Paints varnishes and plastics—Determination of non-volatile-matter
content (ISO 3251. 2003, IDT)
GB/T3186 Paints varnishes and raw materials for paints and varnishes-Sampling
(GB/T3186—2006, ISO15528. 2000, IDT)
GB/T6682—2008 Water for laboratory use; Specifications (ISO3696. 1987, MOD)
GB/T6750—2007 Paints and varnishes—Determination of density—Pyknometer method
(ISO 2811-1. 1997, Paints and varnishes—Determination of density—Part1. Pyknometer
method, IDT)
GB/T9750 Marks for package of coating products
3 Terms and Definitions
The following terms and definitions are applicable to this standard.
Solid color paints
Paints of pearly-lustre-lamp effect pigment without metal.
Base coats
Paints which the surface needs coating varnish.
Solid color paints without clearcoat
Solid color paints which the surface needs coating varnish.
Annex A
Test of volatile organic compounds (VOC) content
A.1 Principle
If the organic compounds with boiling point of above 250℃ are not detected in the
sample after the gas chromatography test, the tested volatile content is the VOC content of
product. If the organic compounds with boiling point of above 250℃ are detected, the
qualitative identification and quantitative analysis shall be carried out on the organic
compounds with boiling point of above 250℃ in the sample. The volatile content deducting
the content of organic compound with boiling point of above 250℃ is the VOC content of
A.2 Material and reagent
A.2.1 Carrier gas. nitrogen, purity≥99.995%.
A.2.2 Fuel gas. hydrogen, purity≥99.995%.
A.2.3 Combustion-supporting gas. air.
A.2.4 Auxiliary gas (septum purging and tail and make-up gas). nitrogen with the same
property with carrier gas.
A.2.5 Internal standard. compounds which don't exist in the sample and can be separated
completely from the other compositions in the chromatogram. The purity is at least 99%
(mass fraction) or the known purity. For example. dimethyl phthalate, diethyl phthalate, etc.
A.2.6 Calibrating compound. compounds used for calibration, the purity is at least 99% (mass
fraction) or the known purity.
A.2.7 Diluting solvent. organic solvents used for diluting sample without any substance of
disturbing test. The purity is at least 99% (mass fraction) or the known purity. For example.
ethyl acetate, etc.
A.2.8 Marker. compounds used to distinguish VOC component from non-VOC component
according to VOC definition. In this standard the marker is specified to be diethylene adipate
(boiling point is 251℃).
A.3 Instrument and equipment
A.3.1 Gas chromatograph is equipped with the following equipments.
A3.1.1 The injection port of divisor and the removable inner lining of vaporizing chamber.
A.3.1.2 Programmed heating controller.
A.3.1.3 Detector
Any of the following three kinds of detectors can be used.
A. Flame ionization detector (FID).
A. The calibrated and tuned velocitron or other mass selective detector.
A. The calibrated Fourier transform infrared spectrometry (FT-IR spectrograph).
Note. if the detectors in A. or A. are adopted to process a qualitative identification to the organic compounds
with boiling point of above 250℃, the apparatus shall connect with the gas chromatograph and shall be operated according to the
relevant illustrations of the apparatus manufacturer.
A.3.1.4 Chromatographic column. it shall be able to enough separate the measured objects,
shall be used for every time to optimize the apparatus in order to make their sensitivity,
stability and separating effect in the best state.
The sample size and the split ratio shall be assorted to avoid beyond the
chromatographic-column capacity and shall be within the linear range of apparatus detector.
A. Qualitative analysis
The marker (A.2.8) shall be put into the chromatograph to measure its holding time on
the dimethyl polysiloxane capillary column in order to determine the integral origination in
the chromatogram according to VOC definition presented in 3.4.
The mixed sample shall be prepared according to the construction mixture ratio shown on
product; after the even mixture, the 2g sample shall be weighed and diluted with the
appropriate amount of diluents (A.2.7); the 1.0μL mixed sample is taken by sample injector
(A.3.2) and put into the chromatograph; the compounds which the holding time is above
marker shall be performed the qualitative identification with the chromatogram recor...
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.