Erichsen test

The Erichsen test is a widely used method for determining the extensibility and adhesion of coating films. It is often used in the paint and coating industry to test the mechanical strength of coatings on various substrates. A defined amount of the coating film is applied to a metal plate, which is then subjected to mechanical elongation.

In the Erichsen test, the coated sample is subjected to an increasing mechanical load by pressing it into the coating with a round punch until the coating cracks or detaches from the surface. The aim of the test is to determine the resistance of the coating to elongation and mechanical stress to ensure that the coating retains its integral properties in practical applications involving mechanical stress.

The stretchability of the coating film, which is measured by this test, indicates how well the film moves with the deformation of the substrate without tearing or chipping. Good stretchability is particularly important for applications in which the coated material is exposed to mechanical stresses such as bending or tension. The adhesion of the coating, which is also assessed by the test, is decisive for how well the coating adheres to the surface and is able to fulfill its protective or decorative function over longer periods of time.

Erichsen testing allows manufacturers to ensure that their coatings meet the required standards in terms of ductility and adhesion and are therefore suitable for their intended use. This helps to ensure the durability and functionality of the coatings.