Measurement of coating or plating thickness on the surface of an article is
another eddy current
application. There are many currently available instruments which can perform
this function. Most instruments are self contained and can be used for
measurement of nonmagnetic coatings on a ferromagnetic base, or nonconductive
coatings on a conductive but nonmagnetic base.
Coating Thickness of both Ferromagnetic and Non Ferromagnetic Substrates:
Clear Coat Thickness
▒ (0.01 mil + 1%) 0-4 mils
▒ (0.1 mil + 3%) >4 mils
▒ (0.5 Ám + 1%) 0 - 100 Ám
▒ (2 Ám + 3%) > 100 Ám
Conforms to: ISO 19840, prEn ISO 19840, ASTM B499, ASTM B244, ASTM D1186, ASTM
D1400, SSPC-PA, and others.