Coating Adhesion Cross-Cut and Tape Tests
topic
Coating adhesion to substrate is measured by cross-cut test per ISO 2409 that scores a grid pattern through the coating with a multi-blade cutter and applies standardised adhesive tape before measuring the percentage of coating area removed by tape pull as a 0 to 5 scale rating, with complementary mandrel bend test per ISO 1519 assessing whether coating cracks and delamicates during bending around defined diameter mandrels at ambient and low temperatures.
Role
Provides quick, practical assessment of coating adhesion quality that detects inadequate substrate surface preparation, incompatible coating-substrate chemistry, and under-cured coatings that would lead to premature coating delamination in service, with cross-cut test results guiding substrate surface treatment selection and coating formulation optimisation during product development before committing to production-scale coating trials.