Peel test

The peel test according to DIN ISO 4624 is a standardized method for determining the adhesive strength of coatings on substrates. This method is used to measure the strength of the bond between a coating and the underlying material. In the peel test, a special tensile test probe is bonded to the coating to be tested. After the adhesive has hardened, the tensile probe is pulled perpendicular to the surface using a tester until the coating tears off.

DIN ISO 4624 specifies the conditions and requirements for carrying out this test in order to ensure reproducible and comparable results. Important parameters specified in the standard include the preparation of the samples, the type of adhesive used, the geometry of the tensile test head and the speed of the pull-off process. The resulting bond strength is usually specified in Newtons per square millimeter (N/mm²).

The peel test can be used to evaluate both the quality of the coating and the suitability of the substrate for specific applications. This test is particularly relevant in areas such as corrosion protection, painting and the coating of construction and vehicle parts, where the adhesion strength is crucial for the durability and performance of the coating. DIN ISO 4624 therefore provides a reliable basis for evaluating adhesion strength and helps to ensure the quality and durability of coatings in various industrial applications.