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GB/T 13452.2-2008 English PDF (GBT13452.2-2008)

GB/T 13452.2-2008 English PDF (GBT13452.2-2008)

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GB/T 13452.2-2008: Paints and varnishes -- Determination of film thickness

GB/T 13452.2-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 87.040
G 50
GB/T 13452.2-2008 / ISO 2808:2007
Replacing GB/T 13452.2-1992
Paints and Varnishes – Determination of Film Thickness
(ISO 2808:2007, IDT)
ISSUED ON: MAY 14, 2008
IMPLEMENTED ON: OCTOBER 01, 2008
Issued by: General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 5
4 Determination of Wet-Film Thickness ... 8
5 Determination of Dry-Film Thickness ... 16
6 Determination of Thickness of Uncured Powder Layers ... 37
7 Measurement of Film Thickness on Rough Surfaces ... 42
8 Test Report ... 43
Annex A (Informative) Overview of Methods ... 45
Bibliography ... 48
Foreword
GB/T 13452 Paints and Varnishes can be divided into the following parts: --- Part 1 is GB/T 13452.1-1992 Paints and Varnishes - Determination of Total Lead - Flame Atomic Absorption Spectrometric Method;
--- Part 2 is GB/T 13452.2-2008 Paints and Varnishes - Determination of Film Thickness; --- Part 3 is GB/T 13452.3-1992 Paints and Varnishes - Determination of Hiding Power - Part 1: Kubelka-Munk Method for White and Light-Colored Paints;
--- Part 4 is GB/T 13452.4-2008 Paints and Varnishes - Determination of Resistance to Filiform Corrosion on Steel.
This Part is Part 2 of GB/T 13452.
This Part equivalently adopts the international standard ISO 2808-2007 Paints and Varnishes – Determination of Film Thickness (English Version).
For the benefit of use, this Standard made the following editorial modifications against ISO 2808:2007:
a) Delete the Foreword and Introduction of the internal standard;
b) Change ISO 2811-1 in the Bibliography of this Part into the national standard GB/T 6750 that equivalently adopts this international standard; and Change ISO 3233 into national standard GB/T 9272 that modifies and adopts this international standard. This Part replaced GB/T 13452.2-1992 Paints and Varnishes - Determination of Film Thickness. Compared with the previous edition GB/T 13452.2-1992, the major technical differences with this Part are as follows:
--- Add Clause 3 Terms and Definitions in this Part;
--- The test of this Part is divided into four clauses based on wet-film thickness, dry-film thickness, thickness of uncured powder layer and paint film thickness on rough surface; while each clause is further divided into the relevant test methods. However, the previous edition only arranges on a clue of single test method;
--- Add the test methods and categories of the wet-film thickness and dry-film thickness in Clauses 4 and 5 of this Part;
--- Add the thickness of uncured powder layer and paint film thickness on rough surface in Clauses 6 and 7 of this Part;
Paints and Varnishes – Determination of Film Thickness
1 Scope
This Standard describes 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 Standard also defines terms concerning the determination of film thickness. 2 Normative References
The provisions in following documents become the provisions of this Part through reference in this Part of GB/T 13452. For dated references, the subsequent amendments (excluding corrigendum) or revisions do not apply to this Standard, however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document 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 Surface
3 Terms and Definitions
For the purposes of this Document, the terms and definitions given in ISO 4618:2006 and the following apply.

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