Abstract
We propose a novel procedure for estimating coating–substrate adhesion energy using a knife-cutting method. This method presented the problem that the force exerted by a cutting blade to a specimen during coating removal is not fixed. That issue associated with the method has been resolved by detecting the “critical normal load.” The value of this load and that of the parallel load are used to ascertain the adhesion energy and the energy for the deformation of the removed part of the coating. The adhesion energy between an electro-deposited acrylic resin coating and a cold-rolled steel substrate was obtained using this procedure.
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