Magnetic Particle Testing

Question 1

What is magnetic particle testing used for?

Answer 1

It is used for ferrous metals.

Question 2

What are ferrous metals?

Answer 2

Ferrous metals are defined as those metals that contain iron.
Ferrous metals include steel, cast iron, and titanium, as well as alloys of iron with other metals (such as with stainless steel).

Question 3

What does magnetic particle testing detect?

Answer 3

It detects flaws close to the surface of the material

Question 4

Explain the steps taken in magnetic particle testing of a ferrous metal. (4)

Answer 4

1. The component to be tested must be first magnetized.
2. Magnetic particles which can be dry or in solution are sprinkled onto the test piece.
3. The particles stick to the magnetic field and flaws can be inspected visually by examining the pattern to see if it has been distorted.
4. The component must be demagnetized after testing.