2017. Vol.20. 1, pp. 10-13
Metrological Assurance of Noncontact Methods of Coating Thickness Measurement
The regulatory framework of metrological assurance of non-contact methods for measuring coating thickness are analyzed. The analysis showed that in the hierarchy scheme is not following type thickness gauges: dielectric coating on dielectric substrates; ferromagnetic coatings on dielectric substrates.
It is also found that the normative documents on the types and methods of nondestructive testing, which is set to the terms and definitions of the requirements, does not specify requirements for standards and measuring instruments involved in the transfer of units and implementing hierarchy scheme. Propositions for the development of normative documents to the non-contact methods for measuring coating thickness, which will establish the requirements for thickness gauge measures the thickness of coatings and the requirements for their verification and calibration are formulated.
To ensure uniformity of measurement of coating thickness non-contact methods is necessary except to impede the geometric also be sure to control the physical, electrical and thermal parameters measures the thickness for each of the non-contact method at the stages of manufacturing and verification of measuring instruments.
Keywords: thickness, coatings, coating thickness standards, non-contact, eddy-current, infrared thermography, x-ray, measurement.