Fluorescent magnetic particle
Fluorescent magnetic powder consists of magnetic particles that glow under UV light and make microstructure defects in metals visible. It is used for precise detection of cracks and other surface deformations.
Physico-chemical mechanism of action
Fluorescent magnetic powder consists of magnetic particles that glow under UV light. These particles are coated with a fluorescent pigment and can cling to surface cracks. Under UV light, they light up with high contrast, making even the smallest cracks visible.
Metallurgical relevance & risks in welding
Using fluorescent magnetic powder is especially helpful when checking weld quality. It can precisely detect microstructural defects, such as cracks or surface deformations, that are harder to see with other methods. This is crucial for the safety and reliability of welded joints.
Workshop practice & instructions
To use fluorescent magnetic powder, sprinkle it on the surface to be tested. Then expose the area to UV light and observe the glowing of the particles. Cracks or other defects will show up with high contrast. It is important to clean the powder off the surface thoroughly to avoid false results. This can be done by gently wiping with a fine cloth or brush.