Magnetic test method according to the standards ISO 2178, ASTM 7091
A permanent magnet generates a constant magnetic field with a strength that corresponds to the thickness of the coating to be measured or the distance between the measurement probe and the base material. The magnetic field strength is measured by a suitable sensor; using the characteristic probe output function, i.e., the functional correlation between the measurement signal and the coating thickness. The measurement signal is converted in the instrument into a coating thickness value.
Main fields of application: Non-magnetizable coating material on steel or iron or nickel coating on non-ferrous metal base material.
- Thick electroplated coatings of chrome, zinc, copper, aluminum etc. on steel or iron
- Thick coatings of enamel, paint or plastic on steel or iron
- Galvanically deposited nickel coatings (Ni) on copper or aluminum; also suited for nickel coatings on pc-board contacts, even under a thin gold coating
- Chemically deposited nickel coatings (Ni), if magnetizable, on copper or aluminum