EN ISO 19399:2017

European foreword
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Wedge-cut principle
6 Apparatus
7 Test specimens
8 Procedure
9 Precision
10 Test report
Annex A (informative) - Error sources and measuring problems
Annex B (informative) - Evaluation with tilted specimen
Annex C (informative) - Evaluation with curved specimen
Bibliography

ISO 19399:2016 specifies a destructive method for determination of the dry film thickness, in which damage to the coat caused in a definite manner is evaluated microscopically. The method is suitable for almost all coat-substrate combinations and also allows determination of the single film thicknesses of coating systems.The method cannot be applied or can only be applied with restrictions in case of- too soft and/or elastic coatings (no recognizable scribe or drill hole can be observed),- hard (cannot be scribed/drilled) or too soft and/or elastic substrates,- too low visual contrast between the coating and substrate, and- film thicknesses that are larger than the depth of field of the measuring microscope.