ASTM E376: Standard practice for measuring coating thickness by the magnetic field test methods.

ASTM B499: Standard method for measurement of coating thickness by the magnetic method.

ASTM D1186: Standard test methods for non-destructive measurement of dry film thickness of non-magnetic coatings.

ASTM D4414: Standard practice for measurement of wet film thickness by notched gages.

ASTM D4138: Standard practice for measurement of dry film thickness or protective coating systems by destructive cross-sectioning means.