Demagnetizing Field
A demagnetizing field opposes the magnetic field of a magnetized body and can be considered when testing its magnetizability.
Physicochemical Mechanism of Action
A demagnetizing field is an external magnetic field that opposes the magnetic attraction of a magnetized material. It can be generated by current-carrying coils or permanent magnets.
Metallurgical Relevance & Risks in Welding
When testing the magnetizability of steels, it is important that the material is not placed in a demagnetizing field. This can lead to errors in detecting cracks or other defects, as the demagnetizing field affects the magnetic properties of the material and impairs the sensitivity of the test.
Workshop Practice & Instructions
When conducting magnetizability tests, it is crucial to ensure that the material under test is not placed in a demagnetizing field. Use an area free from magnetic influences or deactivate any demagnetizing equipment in the vicinity.