Chinese|Shanghai|Shenzhen|Qingdao|Wuhan
Tel
400-819-5688
You are here:Home -- Service Item

    Automobile coatings test

    On June 1st, 2010, the national mandatory standard in automobile industry “Limit of Harmful Substances of Automobile Coatings” (GB24409-2009) was implemented formally, which means that this standard can be based on for limit of harmful substances of automobile coatings. This standard applies to various automobile coatings, except special functional coatings.

    Specific restriction requirements
    In the standard, automobile coating is divided into two categories:
    Category A: solvent based coating, atmosphere thermo plasticity, one-component crosslinking and two-component crosslinking;
    Category B: water-based (including electrophoretic coating), powder and photocurable coating.

    ■ Restriction requirements for hazardous substances in coating of category A: 

    Coating categories

    VOC content g/L

    Limitation of solvent content %

    Heavy metal content (only for colored paint) mg/kg

    Thermoplastics type

    Primer, intermediate coat, base boat (effect pigment paint, solid color paint), overcoat varnish, finish paint with original color

    ≤770

    Benzene≤0.3;
    Total amounts of toluene, ethylbenzene and xylene ≤40;
    Total amounts of ethylene glycol monomethylether, ethylene glycol monoethyl ether, Ethylene glycol methyl ether acetate
    Ethylene glycol monoethyl ether acetateEthylene glycol monobutyl ether acetate ≤0.03

    Pb≤1000
    Cr6+≤1000
    Cd≤100
    Hg≤1000

    One-component crosslinking

    Primer

    ≤750

    Intermediate coat

    ≤550

    Base boat (effect pigment paint, solid color paint)

    ≤750

    Overcoat varnish, finish paint with original color

    ≤580

    Two-component crosslinking

    Primer, intermediate coat

    ≤670

    Base boat (effect pigment paint, solid color paint)

    ≤750

    Overcoat varnish

    ≤560

    Finish paint with original color

    ≤630


    ■ Restriction requirements for hazardous substances in coating of category B: 

    Coating categories

    Limitation of solvent content %

    Heavy metal content (only for colored paint) mg/kg

    Water-based paint (including electrophoretic coating)

    Total amounts of ethylene glycol monomethylether, ethylene glycol monoethyl ether, Ethylene glycol methyl ether acetateEthylene glycol monoethyl ether acetateDiethylene glycol butyl ether acetate ≤0.03

    Pb≤1000
    Cr6+≤1000
    Cd≤100

    Hg≤1000


    PONY Hint
    ■ Interpretation of standard
    Automobile coatings are used for auto body and parts of various vehicles. According to different properties, automobile coatings play an important role in anti-corrosion, extending life and elegant appearance of auto body and parts. In order to meet relevant requirements of use, coating products usually contain many heavy metals, hazardous solvent, VOC and other hazardous substances. These hazardous substances are greatly harmful to human and environment. Recently, hazardous substances management and control in the world is more and more severe, and our country also has made relevant standard requirements, and GB 24409-2009 is one of very important standards.

    This standard laid down the tolerance limit, test methods, test regulations, packaging marks and other contents of substances harmful to human and environment in the original factory coatings, repairing coatings and parts coating, which are used for passenger car, commercial vehicle, trailer, combination vehicles. This standard is suitable for automobile coating except putty and special functional coating.

    ■ Solutions
    As a professional testing organization, Pony Testing reminds enterprises manufacturing and using automobile coatings to pay attention to hazardous substances content in such products, in order to avoid market risk caused by products not meeting the standard requirements. Based on technical advantages in the field of automobile testing, Pony Testing can provide comprehensive solutions to manage and control hazardous substances in automotive products to our partners. For more information, please contact us.