Difference Between Dye Penetrant Testing & Magnetic Particle Inspection

Save

Non-destructive testing (NDT) methods are used in any application where the structural soundness of a material must be determined without altering the material itself. There are dozens of inspection techniques grouped by method to inspect thousands of materials. Liquid dye penetrant testing and magnetic particle inspections are two of these methods.

Dye Penetrant Testing

  • The dye penetrant method involves covering a material with a special dye, either fluorescent or non-fluorescent depending on technique. The dye is then removed from the surface of the material. Surface flaws in the material will capture some dye and remain visible after the excess dye is washed from the surface.

Magnetic Particle Inspection

  • Magnetic particle inspections vary widely by technique but the method principles are consistent. A magnetic force is applied to the subject material, it is dusted with magnetic particles, excess particles are removed, then the material is inspected for groups of residual particles that were caught in the magnetic flux of a crack.

Dyes Vs. Magnets

  • While some magnetic particle techniques involve a liquid as a carrier of the magnetic particles, the magnetic particles themselves, not the liquid, are the indicating material. With dye penetrant, the liquid penetrant itself is the indicating material. The subject material in magnetic testing must be magnetized, whereas liquid penetrant techniques may be used on a wider variety of materials.

Related Searches

References

  • Photo Credit the vertical crack on the wall image by Alexander Finkelberg from Fotolia.com
Promoted By Zergnet

Comments

You May Also Like

  • Fluorescent T8 vs. T12 Bulbs

    Fluorescent bulbs come in two primary types, T8 and T12. Each type has its own set of advantages and disadvantages. Overall, fluorescent...

  • Magnetic Particle Inspection Techniques

    Magnetic Particle Inspection is a widely used method to detect defects. The method is popular since it is a non-destructive technique that...

  • Nuclear Stress Test Vs. Stress Test

    Stress tests and nuclear stress tests are used by cardiologists to anaylze the health of your heart. Different tests are indicated depending...

  • How to Use Magnaflux Dye Penetrant

    Magnaflux dye penetrant is a non-destructive test method for determining if a metallic component has any number of surface flaws. It can...

  • How to Make Your Own Dye Magnet

    A dye magnet is a cleaning product that prevents fabric colors from bleeding onto each other in the washing machine. This product...

Related Searches

Check It Out

3 Day-to-Night Outfits for the Work Week

M
Is DIY in your DNA? Become part of our maker community.
Submit Your Work!