NDT Services (Non-destructive Testing)
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Magnetic Particle Testing (MT)


Magnetic Particle Testing (MT): Our magnetic particle testing technique is employed to identify surface and near-surface defects in ferromagnetic materials.
Magnetic Particle Testing (MT) is a non-destructive testing method used to detect surface and near-surface defects in ferromagnetic materials. It is commonly used in industries such as manufacturing, aerospace, automotive, oil and gas, and structural engineering.
Here’s how Magnetic Particle Testing works: Magnetization: The first step in MT is to magnetize the test specimen. This is usually achieved by using a magnet or by passing an electric current through the material. The magnetic field created within the material makes it susceptible to magnetic particle attraction.
Application of Magnetic Particles: Magnetic particles, typically in the form of a dry powder or a wet suspension, are applied to the surface of the magnetized specimen. These particles are usually made of iron or iron oxide and have magnetic properties.
Particle Accumulation: The applied magnetic particles accumulate at locations where there is a magnetic field leakage due to surface or near-surface defects, such as cracks, discontinuities, or other imperfections. The particles form visible indications, making the defects detectable.
Magnetic Particle Inspection: After the particles are applied, the inspector examines the surface of the test specimen. This is done under appropriate lighting conditions, which may include the use of ultraviolet (UV) light to enhance the visibility of the particles. The inspector looks for the accumulation of particles, which indicates the presence of defects.
Interpretation: The inspector interprets the indications observed during the inspection. The characteristics of the indications, such as their size, shape, and location, help determine the nature and significance of the detected defects. The inspector may also use additional inspection techniques or methods to further evaluate the findings if necessary.
Magnetic Particle Testing is a highly effective method for detecting surface-breaking and near-surface defects in ferromagnetic materials. It is particularly useful for identifying defects like cracks, fractures, laps, seams, and other discontinuities that can compromise the structural integrity of the material.
It is important to note that MT is only applicable to ferromagnetic materials, such as iron, steel, nickel, and cobalt, which can be magnetized. Non-ferromagnetic materials, like aluminum or copper, cannot be inspected using this method.
Qualified technicians or inspectors who have received proper training and certification should perform Magnetic Particle Testing to ensure accurate and reliable results. They follow established standards and procedures to conduct the inspection and interpret the findings correctly.