The mag particles are attracted because the crack indication creates new north and south poles. These allow the magnetic flux to begin there and flow to the opposite poles of the two legs. Alternating current detects flaws only on the surface; this is called the skin effect. Direct currents will flow deeper into the metal. Stainless steel allows only a small depth to be inspected. If you have to go very deep or be able to determine the size of the crack then ultrasonic testing is a better choice.
![[English] MPI/MPT - Magnetic Particle Test practical (Wet visible Technique)](http://i.ytimg.com/vi/Ioz1lVyRsuU/mqdefault.jpg)
The mag particles are attracted because the crack indication creates new north and south poles. These allow the magnetic flux to begin there and flow to the opposite poles of the two legs. Alternating current detects flaws only on the surface; this is called the skin effect. Direct currents will flow deeper into the metal. Stainless steel allows only a small depth to be inspected. If you have to go very deep or be able to determine the size of the crack then ultrasonic testing is a better choice.
@@Helloworldpythonmysql What does that mean?
Excellent explanation given by u😍😍😍... Awesome.....
H
good to explain about this video
Thank you so much🙏💕
Thank u soo much. .. very cleared explanation 🤘
thank you so much
Nice
Excellent
Slim