Quality Control and Testing Services

Quality Control & Testing Services

At Gnee Steel, our professional testing services are designed to ensure that every product we produce meets the highest standards of quality and performance. By leveraging advanced testing techniques and state-of-the-art equipment, we can guarantee that our galvanized steel sheets, coils, pipes, and profiles are durable, reliable, and compliant with all relevant industry standards.

Chemical Composition Analysis

Chemical Composition Analysis

  • Steel Matrix Composition
  • Zinc Layer Composition
  • Impurity Elements
  • Oxide Content
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Zinc coating Thickness Measurement

  • Magnetic Induction and Eddy Current Devices: Our state-of-the-art devices measure the thickness of the zinc coating with high precision. Magnetic induction is used for ferrous substrates, while eddy current devices are ideal for non-ferrous substrates.
  • Microscopic Analysis: Cross-sectional microscopic examination provides detailed images of the coating layers, allowing us to ensure uniformity and precise measurement.
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zinc coating
Bend-Test service

Adhesion Testing

  • Bend Test: This test assesses the flexibility and adhesion of the coating by bending the steel to a specified angle and checking for any signs of cracking or peeling.
  • Peel Test: We evaluate the force required to remove the zinc coating, ensuring strong adhesion between the coating and the steel substrate.
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Mechanical Property Testing

  • Tensile Properties
  • Pressure Performance
  • Hardness Test
  • Fracture Toughness
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Dimensional and Tolerance Verification

  • Precision Gauging: Our precise measuring tools verify the dimensions of steel sheets, coils, or pipes, ensuring they meet the specified thickness, width, and length tolerances.
  • Flatness and Straightness Testing: We ensure that our products are within acceptable flatness and straightness tolerances, which are critical for their performance in various applications.
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Corrosion Resistance Testing

  • Salt Spray Test (ASTM B117)
  • Cyclic Corrosion Testing
  • UV Exposure Testing
  • Thermal Cycling
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Salt Spray Test

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