Corrosion Flaw Detection Using Magnetic Flux Leakage and Giant Magnetoresistive Sensors

Magnetic Flux Leakage (MFL) is a magnetic flaw detection technique used for locating pits and flaws in ferrous materials. A prototype was created utilizing Giant Magneto Resistive (GMR) sensors for MFL detection. GMR sensors allow for precision and accuracy over other sensor types. Possibilities for advancement in the field of MFL detection include determination of depth and orientation of flaw as well as fine crack detection. Finite Element Analysis (FEA) was combined with experimental testing to verify results.  MFL detection utilizing GMR sensors was successful and steps have been taken to further determination of the orientation of flaw.