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ČSN EN ISO 21968 (038193)
Non-magnetic metallic coatings on metallic and nonmetallic basis materials - Measurement of coating thickness - Phase-sensitive eddy-current method
Translate name
STANDARD published on 1.4.2020
The information about the standard:
Designation standards: ČSN EN ISO 21968
Classification mark: 038193
Catalog number: 509185
Publication date standards: 1.4.2020
SKU: NS-989722
The number of pages: 52
Approximate weight : 156 g (0.34 lbs)
Country: Czech technical standard
Category: Technical standards ČSN
The category - similar standards:
Annotation of standard text ČSN EN ISO 21968 (038193):
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 than the amplitude-sensitive eddy-current method specified in ISO 2360, and is less affected by the magnetic properties of the basis material. However, the phase-sensitive method is more affected by the electrical properties of the coating materials. In this document, the term "coating" is used for materials such as, for example, paints and varnishes, electroplated coatings, enamel coatings, plastic coatings, claddings and powder coatings. This method is particularly applicable to measurements of the thickness of metallic coatings. These coatings can be non-magnetic metallic coatings on non-conductive, conductive or magnetic base materials, but also magnetic coatings on non-conductive or conductive base materials. The measurement of metallic coatings on metallic basis material works only when the product of conductivity and permeability of one of the materials is at least a factor of two times the product of conductivity and permeability for the other material. Non-ferromagnetic materials have a relative permeability of one
Preview of the standard ČSN EN ISO 21968 (038193)
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