Current Flow Magnetization
Current flow testing is a method for detecting longitudinal defects in workpieces by direct current conduction. It generates a magnetic field that makes metal defects visible.
Physical-Chemical Mechanism of Action
During direct current flow, an electric current is passed directly through the workpiece to be tested. This creates a magnetic field that makes metal defects like cracks or damage visible.
Metallurgical Relevance & Risks When Welding
Direct current flow is especially useful for detecting longitudinal defects in weld areas. Missing or too strong flow conductivity can lead to inaccurate results and may cause potential defects to be overlooked.
Workshop Practice & Instructions
To perform direct current flow correctly, the current must be passed directly and continuously through the workpiece. The current strength should be set so that a sharp magnetic field edge develops. For missing or too strong flow, the testing methods should be reviewed and optimized.