1. Scope 1.1 This test method covers the nondestructive measurement of the dry film thickness of electrically nonconductive coatings applied over a nonferrous metal base using commercially available eddy current instruments. 1.2 This test method is not applicable to coatings that are readily deformable under the load of the measuring instruments, as the instrument probe must be placed directly on the coating surface to take a reading. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.