UNICOIL has two laboratories: one for testing galvanized steel products and another for pre-painted galvanized steel products. Both laboratories have state-of-the-art facilities sourced from renowned agencies from USA and UK to carry out the testing and evaluation of galvanized and pre-painted steel products.

The quality management system at UNICOIL ensures periodical maintenance and calibration of equipment to ensure the accuracy and reliability of testing. The UNICOIL laboratory participates in periodic “Proficiency Test Programs” of ASTM International, a program in which more than 100 laboratories worldwide participate in testing unknown samples to ensure accuracy and reliability of testing at an international level. UNICOIL Laboratories are accredited with ISO17025-2017, from Emirates International Accreditation Center. UNICOIL is the first company that received such accreditation in the flat steel industry within Middle East.

ISO 17025 is the single most important standard for calibration and testing laboratories around the world. Laboratories that are accredited to this international standard have demonstrated that they are technically competent and able to produce precise and accurate test and/or calibration data, providing confidence to customers that the test results provided are reliable and dependable.

Emirates International Accreditation Centre (EIAC) was established pursuant to Law number (27) for the year 2015, issued by His Highness Sheikh Mohammed bin Rashid Al Maktoum, the Vice President and Prime Minister of the UAE, Ruler of Dubai, to become the governmental accreditation body of the Emirate of Dubai.

UNICOIL has in-house, state-of-the-art quality assurance laboratory equipment to perform the tests described below:

  • Lead in Zinc

    Standard : ASTM E1613

    Laboratory analysis is considered the most accurate method for measuring the lead level in zinc.

    Device used : Inductively coupled plasma device

  • Zinc Coating Mass

    Standard : ASTM A90

    Laboratory analysis is considered the most accurate method for measuring the mass of the zinc coating.

    Device used : Analytical precision weighing balance.

  • Zinc Purity

    Standard: ISO 3815

    The chemical compositions of zinc and zinc alloys are measured to determine the percentage contents of zinc, aluminum, iron, cadmium, lead, tin, magnesium, copper, and antimony.

    Device used: Optical emission spectrometer.

  • Rockwell Hardness

    Standard : ASTM E18 & ASTM A370

    The hardness of galvanized steel is measured on both regular and superficial scales.

    Device used : Rockwell hardness tester.

  • Tensile Testing

    Standard : ASTM E8 & ASTM A370

    The yield strength, tensile strength, and percentage elongation of galvanized steel sheet are measured.

    Device used: Universal tensile testing machine.

  • Coating Bend Test

    Standard : ASTM A653M

    The coating bend test is performed to determine the adhesion of the zinc coating to the steel surface.

    Device used: Bench vice

  • Lock Forming

    This simulation test is to confirm the proper adhesion of the zinc coating to the steel surface.

    Device used: Lock former


  • Reverse Impact Test

    The reverse impact test is a destructive test to confirm the proper adhesion of the zinc coating to the steel surface.

    Standard: ASTM 2794

    Device used: Impact tester

  • Lead in Paint Test

    Standard : ASTM E1613:2012

    Laboratory analysis is considered the most accurate method for measuring the lead level in paint.

    Device used : Inductively coupled plasma device

  • Dry-Film Thickness Test

    Standard: ASTM D5796-99

    The dry-film thickness (DFT) is measured using a commercially available machine supplied by DJH Designs. This is a accurate machine for measuring paint thicknesses.

    Device used : Supplied by DJH Designs.

  • Spectrophotometer Color Test

    Standard: ASTM D2244

    This test uses a spectrophotometer to measure the color difference between standard samples and the test sample.

    Device used : Spectrophotometer.

  • 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.

  • 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.

  • 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

  • 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

  • “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

  • 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.

  • 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.

  • 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.

  • UV Resistance

    Standard : ASTM G154

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

    Device used: QUV test cabinet.

Information provided in these videos are for demo purpose only to provide an idea of how the tests are performed on Galvanized Steel Coils & Sheets and on Pre-painted Steel Coils & Sheets. Interested persons wanting to know more details about these tests can contact UNICOIL laboratories at

FREE Galvanized Steel and Prepainted Galvanized Steel Sheet Testing

UNICOIL offers free laboratory testing services, since the constituent components of galvanized and prepainted steel sheets cannot be identified by the naked eye. The actual components measured in most imported steel sheets do not match the declared components.

The following parameters are tested free of charge in our laboratories:

Galvanized Steel ParametersUnits
Total coated thickness—metalmm
Zinc coating massgsm
Lead level in zincppm or mg/kg

Prepainted Galvanized Steel ParameterUnits
Total coated thickness—paintedmm
DFT (top and bottom)microns
Zinc coating massgsm
Lead level in paint (top and bottom)ppm or mg/kg

To send your request for a free laboratory test for galvanized steel and prepainted galvanized steel sheets, please contact your sales account manager or customer services, or send your inquiry using the button below:

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