Post-blasting, what specific method is used to objectively measure and verify the achieved surface profile (anchor pattern) on bare metal, ensuring it meets the specific manufacturer's recommendations for optimal epoxy primer adhesion?

The specific method used to objectively measure and verify the achieved surface profile, also known as the anchor pattern, on bare metal after blasting is the use of a replicating film in conjunction with a specialized spring micrometer. The surface profile refers to the microscopic peaks and valleys intentionally created on the metal surface by the abrasive blasting process. This rough texture, or anchor pattern, is crucial for achieving optimal mechanical adhesion of subsequent coatings like epoxy primers, allowing the primer to physically interlock with the prepared surface. To perform the measurement, a replicating film, such as Testex Tape, is employed. This film consists of a compressible foam layer on one side and a non-compressible polyester backing on the other. Different grades of film are available, each designed for a specific range of surface pr....