Magnetization effect on hydrogen absorption in high-strength steels and its implications

Magnetization effect of hydrogen absorption in high-strength steels has been investigated and the implications of the results for magnetic flux leakage assessment used for determination of defects in line pipe steels are discussed. A strong and continuous remanent magnetic field in steels at a level commonly residual from magnetic flux leakage assessment practices can result in an increase of up to 1.62 times in the absorbed hydrogen concentration.