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Laboratories


UNICOIL has two laboratories: one for testing galvanized steel products and another for prepainted 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 prepainted 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 accredited with ISO17025-2005, from Dubai Accreditation center (DAC) which is a signatory of ILAC - MRA (International Laboratories Accreditation Cooperation- Mutual Recognition Agreement). UNICOIL is the first and only company that received such accreditation in the flat steel industry within Middle East.

What is ISO 17025?

Who are DAC?

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

Prepainted Steel Test


Lead in Paint Test Tutorial Video

Standard : ASTM E1613:2012

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

Machine used : Inductively coupled plasma device

Dry-Film Thickness Test Tutorial Video

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.

Machine used : Supplied by DJH Designs.

 
     
DJH machine   Paint thickness image
Spectrophotometer Color Test Tutorial Video

Standard: ASTM D2244

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

Machine used : Spectrophotometer.

Visual Color Test Tutorial Video

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.

Machine used : Color cabinet assessment.

Surface Gloss Test Tutorial Video

Standard: AS 1580.602.2, 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.

Machine used : Glosso meter.

Pencil Hardness Test Tutorial Video

Standard: AS 1580.405.1, NCCA II-12

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 TestTutorial Video

Standard: NCCA II-18

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.

"T"-Bend TestTutorial Video

Standard: AS 2728 (App F), NCCA II-19

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: if this removes the paint film then the metal thickness inside the bend has to been increase until no paint can be removed using sticky tape.

Reverse Impact Test Tutorial Video

Standard: AS 2728 (App E), NCCA II-6

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 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.

Elasticity Test Tutorial Video

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 Tutorial Video

Standard : ASTM B 117-94

This is an accelerated corrosion test for organic coatings. Both salt spray and Q-fog options are available.


UV Resistance Tutorial Video

Standard : ASTM G154

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

Machine used : QUV test cabinet.

Natural Weathering

Standard : ASTM G7

This is a natural weathering test of prepainted steel products.



Galvanized Steel Test


Lead in Zinc Tutorial Video

Standard : ASTM E1613:2012

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

Machine used : Inductively coupled plasma device

Zinc Coating Mass Tutorial Video

Standard : ASTM A90 :2013

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

Machine used : Analytical precision weighing balance.

Zinc Purity Tutorial Video

Standard: ISO 3815:05

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.

Machine used : Optical emission spectrometer.

Rockwell Hardness Tutorial Video

Standard : ASTM E18-15 & ASTM A370-14

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

Machine used : Rockwell hardness tester.

Vickers Hardness Tutorial Video

Standard : ASTM E384-11 & ASTM A370-14

The hardness of thin to thick galvanized steel sheets can be measured.

Machine used : Vickers hardness tester.

Tensile Testing Tutorial Video

Standard : ASTM E8-15 & ASTM A370-14

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

Machine used : Universal tensile testing machine.

Coating Bend Test Tutorial Video

Standard : ASTM A653M-15

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

Machine used : Bench vice

Lock Forming Tutorial Video

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

Machine used : Lock former

Reverse Impact Test Tutorial Video

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

Machine used : Impact tester

Steel Chemical Composition

Standard :ASTM E 415
The chemical composition of steel is measured to determined the percentage contents of carbon, manganese, sulfur, phosporus, chromium, copper, nickel, aluminum, silicon, titanium, niobium, vanadium, and molybdenum.

Machine used : Optical emission spectrometer

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 lab.test@unicoil.com.sa


 

What is a Free-of-Charge Laboratory Test?

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 Parameters

     

    Units

         
  • Total coated thickness—metal
  •   mm
  • Zinc coating mass
  •   gsm
  • Lead level in zinc
  •   ppm or mg/kg

    Prepainted Galvanized Steel Parameter

     

    Units

         
  • Total coated thickness—painted
  •   mm
  • DFT (top and bottom)
  •   microns
  • Zinc coating mass
  •   gsm
  • 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:

 


 

Recommended Independent Metal-Coating Laboratories

(Kingdom of Saudi Arabia)

Additionally, UNICOIL recommends the following independent and accredited laboratories in Saudi Arabia if a testimonial independent laboratory test statement is required:

 

Industrial Support Services Company (ISS)


City: Dammam
Tel: 013-822-7486, Extn: 333
Fax: 013-822-8296
Mob: 059-892-7974
Email: ibrahemw@issndt.com
Website: www.issndt.com
 

 

Inspection services Saudi Arabia Ltd., (SGS)


City: Al-Jubail
Tel: 013-362-1266
Fax: 013-362-1277
Mob: 054-577-8630
Email: hanosh.mohanan@sgs.com
Website: www.sgs.com

 

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Last Updated on Saturday June 24 of 2017