Description

• a.Metal matrix: For magnetic methods, the basic metal surface magnetic and surface roughness of the film standard should be similar to the surface roughness of the magnetic and metal substrates.
• b.For eddy currents, the electrical properties of the base metal of the film standard should be similar to those of the metal substrate.
• c.Metal substrate thickness.
• d.Check if the thickness of the base metal exceeds the critical thickness. If not, you can calibrate by following the instructions in the precautions.
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