Whether the coating remains bonded to the metal after a sudden strike.
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
A standard weight (often 2 lb or 4 lb) is dropped through a guide tube from a known height onto an indenter. Whether the coating remains bonded to the metal
The primary goal of this standard is to predict how well a coating will hold up during its service life when hit by tools, debris, or other heavy objects. The test determines: A standard weight (often 2 lb or 4
The specific energy threshold (measured in inch-pounds) where failure first occurs. The Testing Procedure
The ASTM D2794 procedure uses a falling-weight apparatus to induce a controlled impact on a coated panel.
How much the coating can stretch with the substrate without breaking.