1 Scope
This part specifies a number of methods that are applicable to the measurement of the thickness of coatings applied to a substrate. Methods for determining wet-film thickness, dry-film thickness and the film thickness of uncured powder layers are described. Reference is made to individual standards where these exist. Otherwise the method is described in detail.
An overview on the methods is given in Annex A, in which the field of application, existing standards and the precision are specified for the individual methods.
This part also defines terms concerning the determination of film thickness.
2 Normative References
The following normative document contains provisions which, through reference in this text, constitute provisions of this part of GB/T 13452. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated below. For undated references, the latest edition of the normative document referred to applies.
ISO 463 Geometrical Product Specifications (GPS) — Dimensional Measuring Equipment — Design and Metrological Characteristics of Mechanical Dial Gauges
ISO 3611 Micrometer Callipers for External Measurement
ISO 4618:2006 Paints and Varnishes — Terms and Definitions
ISO 8503-1 Preparation of Steel Substrates Before Application of Paints and Related Products — Surface Roughness Characteristics of Blast-cleaned Steel Substrates — Part 1: Specifications and Definitions for ISO Surface Profile Comparators for the Assessment of Abrasive Blast-cleaned Surfaces
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in ISO 4618 and the following apply.
3.1
substrate
surface to which a coating material is applied or is to be applied
[ISO 4618:2006]
3.2
coating
continuous layer formed from a single or multiple application of a coating material to a substrate
[ISO 4618:2006]
3.3
film thickness
distance between the surface of the film and the surface of the substrate
3.4
wet-film thickness
thickness of a freshly applied wet coating material, measured immediately after application
3.5
dry-film thickness
thickness of a coating remaining on the surface when the coating has hardened
3.6
thickness of uncured powder layer
thickness of a freshly applied coating material in powder form, measured immediately after application and before stoving
Foreword II
1 Scope
2 Normative References
3 Terms and Definitions
4 Determination of Wet-film Thickness
5 Determination of Dry-film Thickness
6 Determination of Thickness of Uncured Powder Layers
7 Measurement of Film Thickness on Rough Surfaces
8 Test Report
Annex A (Informative) Overview of Methods
Bibliography
