Non-magnetic metallic coatings on metallic and non- metallic basis materials. Measurement of coating thickness. Phase-sensitive eddy-current method Ingestion-build-54484 TC 77 and its sub-committees

TC 77 and its sub-committees are prepared to co-operate with product committees in the evaluation of the value of particular immunity tests for their products

Fluid power generation stations

often for extended periods of time

accelerating the natural degradation of materials

Non-magnetic metallic coatings on metallic and non- metallic basis materials. Measurement of coating thickness. Phase-sensitive eddy-current method Ingestion-build-54484 TC 77 and its sub-committees1 Scope This document specifies a method for using phase sensitive eddy current instruments for non destructive measurements of the thickness of non magnetic metallic coatings on metallic and non metallic basis materials such as: a) zinc, cadmium, copper, tin or chromium on steel; b) copper or silver on composite materials. The phase sensitive method can be applied without thickness errors to smaller surface areas and to stronger surface curvatures