Description
kaloMAX NT II S3
The ball crater test (Calotest) is a well established method for the determination
of layer thickness. With a rotating steel ball and an abrasive slurry, a spherical cap is ground
through the coating into the base material of the sample. When examined with a microscope,
the layer/base material interface appears as a circle or, in case of a multilayer coating, a system
of concentric circles. The layer thickness can be calculated from the diameters of these circles and
the diameter of the grinding ball. This purely geometrical method gives highly accurate results even
for layer thicknesses in the range of micrometers. Evaluation and documentation can be further simplified
By the software kaloSOFT and a camera-equipped microscope.
