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BS EN ISO 4624:2023 – TC

BS EN ISO 4624:2023 – TC

$134.27

Tracked Changes. Paints and varnishes. Pull-off test for adhesion

Published By Publication Date Number of Pages
BSI 2023 50
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This document specifies three methods for determining the adhesion by carrying out a pull-off test on a single coating or a multi-coat system of paint, varnish or related product. These methods include: —    method A: using two dollies, suitable for testing both rigid and deformable substrates; —    method B: testing from one side only, using a single dolly, suitable for rigid substrates only; —     method C: using dollies, one as a painted substrate. These test methods have been found useful in comparing the adhesion behaviour of different coatings. It is most useful in providing relative ratings for a series of coated panels exhibiting significant differences in adhesion. The test can be applied using a wide range of substrates. Different procedures are given according to whether the substrate is deformable, e.g. thin metal, plastics and wood, or rigid, e.g. thick concrete and metal plates. To avoid distortion of the substrate during the tensile test, it is common to use a sandwich construction. For example, for special purposes, the coating can be applied directly to the face of a test dolly.

PDF Catalog

PDF Pages PDF Title
30 undefined
32 European foreword
Endorsement notice
34 Foreword
35 Introduction
37 1 Scope
2 Normative references
3 Terms and definitions
38 4 Principle
5 Apparatus
41 6 Adhesives
42 7 Sampling
8 Test panels
8.1 Substrate
8.2 Preparation and coating
8.3 Drying and conditioning
8.4 Thickness of coating
9 Procedure
9.1 Number of determinations
9.2 Ambient conditions
9.3 Adhesive
43 9.4 Test assemblies
9.4.1 Method A: General method (using two dollies) for testing both rigid and deformable substrates
9.4.2 Method B: Method for testing from one side only, using a single dolly (suitable for rigid substrates only)
44 9.4.3 Method C: Method using dollies, one as a painted substrate
45 9.5 Measurement
9.5.1 Breaking strength
9.5.2 Nature of the fracture
10 Calculation and expression of results
10.1 Breaking strength
46 10.2 Nature of failure
10.3 Example
11 Precision
12 Test report
48 Bibliography

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BS EN ISO 4624:2023 - TC
$134.27