Demagnetization of the Thick Wall Alloy Steel Pipe by Magnetizing Testing

The remnant magnetization of the thick wall alloy steel pipe on eddy current testing is analyzed in the paper. A new method of demagnetization is put forward. The difficult problem of demagnetization of thick wall alloy steel pipe on eddy current testing is solved. This kind of technique is used on the demagnetization of the thick wall alloy steel pipe on eddy testing.