These test methods cover procedures for assessing the
adhesion of coating films to metallic substrates by applying and removing
pressure-sensitive tape over cuts made in the film.
Test Method A is primarily intended for use at job sites while
Test Method B is more suitable for use in the laboratory. Also, Test Method B
is not considered suitable for films thicker than 5 mils (125μm).
Note 1—Subject to agreement between the purchaser and the
seller, Test Method B can be used for thicker films if wider spaced cuts are
employed.
These test methods are used to establish whether the
adhesion of a coating to a substrate is at a generally adequate level. They do
not distinguish between higher levels of adhesion for which more sophisticated
methods of measurement are required.
Note 2—It should be recognized that differences in
adherability of the coating surface can affect the results obtained with
coatings having the same inherent adhesion.
In multicoat systems adhesion failure may occur between
coats so that the adhesion of the coating system to the substrate is not
determined.
Let's see what standard says:
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The coating and paint properties mainly include physical properties (such as appearance, density, thickness, mechanical properties like bond strength, abrasion resistance, residual stress, etc.) and chemical properties (such as chemical composition, Coating and Paint testing
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