Crosscut Adhesion Test

Definition - What does Crosscut Adhesion Test mean?

This is a standard (ASTM or ISO) test done by specialists on dry coatings and paints so that the adhesion of the coating or paint is determined based on the resistance they have when separated from the substrate.

The procedure is used for a quick pass or fail test on multicoat systems.

Corrosionpedia explains Crosscut Adhesion Test

In order to perform this procedure, one ought to have the required tools: the crosscut kit, magnifier and a table chart. The kit consists of parallel knives, which are to be used to cut through the dry paint.

The test requires one to make a lattice pattern in the film to the substrate by producing a series of parallel cuts, cross-angled to each other to produce 25–100 squares of the same dimensions. A short treatment is done on the ruled area by brushing in a diagonal direction; pressure-sensitive tapes can also be used for hard substrates.

Finally, the grid area is examined and evaluated by a magnifier and the standard tabled chart to determine the adhesion rate of the coating or paint; the coating removal is used to determine the rate of adhesion. The variance of the adhesion of coatings comes as a result of the surface treatment or the nature of the substrate. A crosscut adhesion test is done on different substrates provided there exists a film of coating.

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