Magnetic Particle Testing -VIII: Safety Precaution & Limitations

Magnetic Particle Testing : Safety Precaution & Limitations

Safety Precaution

A. Electrical Arcing is Hazard.

1. It is usually caused by poor contact or by using excessive current.
2. It can also be caused by allowing the prods to slip which may result in arcing or damaging the surface of the part.
3. The arcing causes sparks which may result in a fire.
4. 
   

   

   Electrical Arcing 

B. The Dust from the magnetic Particles is nontoxic, but excessive amounts should not be inhaled. Use a dust respirator.

C. Smoking or Open Flame should not be permitted near the wet bath process.

D. The Black Light which is used with fluorescent particles will not damage the skin or eyes if the filters are used on the light.

1. It is possible to experience a clouding of vision if the black light is directed into the eyes.
2. This happens because the fluid in the eyes will momentarily fluoresce.

E. Burns can be caused due to the resistance heating in the part or in the prods. Caution should be used in handling the parts or touching the immediately after the magnetic particle test.

Limitations of Magnetic Particle Testing.

1. Nonmagnetic materials cannot be testing.
2. Magnetic particle testing will not detect discontinuities that deeper than approximately ¼ inch below the surface. However, the penetration depends on the permeability of material, type of discontinuity, and amount & type of current used.

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Magnetic Particle Testing