Calotester kaloMAX NT II S3 – ball crater test

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.

https://www.youtube.com/watch?v=J2XnasTFD70&ab_channel=BAQGmbH%28AutomatisierungundQualit%C3%A4tssicherung%29