Prepainted Steel Test

Prepainted Steel Test

  • UV Resistance

    Standard : ASTM G154

    This is an accelerated test of the UV resistance of prepainted steel products.

    Device used: QUV test cabinet.

  • Salt Spray Test

    Standard : ASTM B 117

    This is an accelerated corrosion test for organic coatings. Both salt performed in a salt spray cabinet.

    Device used: Salt spray cabinet.

  • Elasticity Test

    Standard : ASTM D522

    Elasticity refers to the flexibility of the paint film when the metal sheet is subjected to radius bending. The paint film should not crack while bending the metal. The elasticity is measured with the aid of an eye piece after magnifying an image of the paint surface.

    Machine used : Conical mandrel tester.

  • Reverse Impact Test

    Standard: ASTM D 2794

    The reverse impact test is a destructive test. This test involves dropping a mass of about 2 kg from a height of about 70 cm, thereby exerting a falling force of 13 Joules. The force will vary according to the thickness of the sheet.The associated energy transfer will result in loosening of the paint film. The stability of the coating is measured by applying tape on the reverse direction of the impact area.

    Device used: Impact Tester.

  • “T”-Bend Test

    Standard: ASTM D4145

    The "T"-bend test is a very important test for ensuring the adhesion of the paint film during critical bending of the metal sheet. A "0" T bend is the most critical and 5 T is less critical.

    Device used: Bench vice

  • Solvent Resistance Double-Rub Test

    Standard: ASTM D5402/ASTM D7835

    The solvent resistance test indicates the stability of a paint film exposed to organic solvents. A greater solvent resistance indicates that the paint film is more stable and durable for outdoor exposure. This test is performed using the organic solvent methyl ethyl ketone.

    Device used: Solvent Resistance machine

  • Pencil Hardness Test

    Standard: ASTM D3363

    The pencil hardness test is used to measure the hardness of the paint film. The results of this test indicates the degree of curing of the paint film. A noncured paint film has a lower pencil hardness, which makes it more likely to be damaged.

    Device used: Pencil leads

  • Surface Gloss Test

    Standard: ASTM D523

    Surface gloss relates to the light reflectance from a painted surface. This is a paint property that can be varied by the addition of matting agents or dulling agents during paint manufacture. The gloss levels include low gloss, medium gloss, and high gloss.

    Device used : Glosso meter.

  • Visual Color Test

    Standard: ASTM D4086

    This is a very important color assessment test. Standard samples and the test sample are positioned side by side and analyzed for shade variations. Some of the colors are metameric, and are considered suitable only after being analyzed using this machine.

    Device used : Color cabinet assessment.

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