Standard Test Method for Evaluating Adhesion by Knife

Importancia y uso:

4.1 Coatings, to perform satisfactorily, must adhere to the substrates on which they are applied. This test method has been found useful as a simple means of assessing the adhesion of coatings. Although this method is a qualitative (subjective) test it has been used in industry for many years and can provide valuable information.

4.2 Other adhesion test methods may be useful in obtaining quantitative results. See Test Methods D2197, D3359, D4541, and D7234.

4.3 The Performance Evaluation Scale (see Table 1) is based on both the degree of difficulty to remove the coating from the substrate and the size of removed coating chip.

4.4 This test method does not have a known correlation to other adhesion test methods (pull-off, tape, etc.).

4.5 A coating that has a high degree of cohesive strength may appear to have worse adhesion than one that is brittle and hence fractures easily when probed.

4.6 This method is not to be used on overly thick coatings, that is, those which cannot be cut to the substrate with a utility knife in one stroke.

Subcomité:

D01.46

Referida por:

D6944-15R20, D4619-12R18, D5064-16AR21, D5163-16R21, D6943-15R24, D5065-17R21, D5367-16R21, A1113_A1113M-20E01, G0210-13R23, D6577-24, D5498-12AR18, D7167-12R18, D8555-24, F3182-23, D6237-24, D3276-21, D7230-06R21

Volúmen:

06.02

Número ICS:

19.040 (Environmental testing), 25.220.01 (Surface treatment and coating in general)

Palabras clave:

adhesion; coating; intercoat adhesion; knife adhesion; paint; wet adhesion;