What is the primary function of demagnetization after magnetic particle inspection?

The primary function of demagnetization after magnetic particle inspection is to ensure that residual magnetism does not affect performance. During magnetic particle inspection, a magnetic field is applied to the part being tested, which can sometimes leave behind residual magnetism even after the inspection is completed. This residual magnetism can lead to issues such as interference with electronic components, attraction of ferromagnetic debris, and potential reduction in the component's performance or functionality in its intended application.

Demagnetization effectively removes this residual magnetism, allowing the part to perform as designed without any unintended side effects from the magnetic fields that might remain. This process is crucial in many applications, especially in delicate or precision components where even slight magnetic interference could have significant consequences.

While preparing the part for painting is important in some contexts, the primary goal of demagnetization in this inspection process is directly related to maintaining optimal operational performance. Therefore, the most accurate choice focuses on the prevention of any adverse effects from residual magnetism.