Cohesive and adhesive fractures are identified as follows:
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Analysis of Test Results
Upon completion of the pull-off test, the dolly and coated surface
should be examined. In addition to pull-off force, many National
and International standards such as ASTM D4541 and ISO 4624
require the nature of the fracture to be recorded.
Dolly Face Coated Surface
Adhesive
fracture:
fracture occurs at the interface
between layers (coating on
dolly face differs from surface).
Cohesive
fracture:
fracture occurs within a coating
layer (same coating on dolly
face and coated surface).
n
n
8
