PING 2019 is organized with the support of funds for specific university research project SVK1-2019-002.The contribution describes a fast contactless measurement of a paint thickness nonuniformity
using flash pulse thermography. Specimens sprayed by a paint were
thermally excited by a flash lamp and temperature responses were recorded by an
infrared camera. The recorded sequences were post-processed with Fast Fourier
Transform to obtain phase angles. Differences in the resulting images showed phase
differences which corresponded to a paint thickness non-uniformity. Furthermore, the
phases were correlated with the thickness by means of calibration curve so that the
paint thickness could be determined with flash pulse phase thermography
measurement. The method showed a promising potential in the contactless evaluation
of the paint thickness. Average error of the thickness determination was less than 10 %
for samples with paint thickness from 41 to 74 μm on AISI 304 substrate. Advantages,
disadvantages and limitations of described method were discussed
