BS EN ISO 21968:2019 - Non-magnetic metallic coatings on metallic and non- metallic basis materials. Measurement of coating thickness. Phase-sensitive eddy-current method
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BS EN ISO 21968:2019

Non-magnetic metallic coatings on metallic and non- metallic basis materials. Measurement of coating thickness. Phase-sensitive eddy-current method

Status : Current   Published : October 2019

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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:

  1. zinc, cadmium, copper, tin or chromium on steel;

  2. 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 â??coatingâ?? 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 (Ï?, μ) 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.




Standard NumberBS EN ISO 21968:2019
TitleNon-magnetic metallic coatings on metallic and non- metallic basis materials. Measurement of coating thickness. Phase-sensitive eddy-current method
StatusCurrent
Publication Date28 October 2019
Normative References(Required to achieve compliance to this standard)ISO/IEC Guide 98-3, ISO 2064, ISO 4618
Informative References(Provided for Information)ISO 5725-1:1994, ISO/IEC Guide 99:2007, ISO 2178, ISO 5725-2, ISO 2360, ISO/TR 22971
ReplacesBS EN ISO 21968:2005
International RelationshipsEN ISO 21968:2019,ISO 21968:2019
Draft Superseded By18/30357452 DC
DescriptorsMeasurement, Magnetic measurement, Eddy-current braking, Non-magnetic alloys, Coatings technology
ICS25.220.40
Title in FrenchRevêtements métalliques non magnétiques sur des matériaux de base métalliques et non métalliques. Mesurage de l'épaisseur de revêtement. Méthode par courants de Foucault sensible aux variations de phase
Title in GermanNichtmagnetische metallische Überzüge auf metallischen und nichtmetallischen Grundwerkstoffen. Messung der Schichtdicke. Phasensensitives Wirbelstromverfahren
CommitteeSTI/33
ISBN978 0 580 97788 6
PublisherBSI
FormatA4
DeliveryYes
Pages46
File Size2.116 MB
Price£246.00


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