Whether the coating remains bonded to the metal after a sudden strike.
How much the coating can stretch with the substrate without breaking. astm d2794 pdf
Once a crack is identified, multiple tests are conducted at that height to confirm the results. ASTM D2794: Impact Resistance Test Explained Whether the coating remains bonded to the metal
The test begins at a height where no failure is expected. The drop height is increased incrementally—usually by 1 inch at a time—until visible cracks appear in the coating. astm d2794 pdf
The panel is placed in the tester, either with the coated side up ( direct impact ) or down ( reverse impact ).