Astm D2794 Pdf -

The weight strikes the uncoated back side of the panel, causing the coating to bulge outward (extrusion). Reverse impact is generally more severe because it puts the coating under extreme tensile stress. 3. Executing the Drops Place the conditioned test panel over the die.

ASTM D2794 is a standard test method developed by the American Society for Testing and Materials (ASTM) that covers the determination of the resistance of organic coatings to surface deterioration by sulfur dioxide (SO2) gas. The test is designed to evaluate the effects of SO2 on coatings, which can cause chalking, discoloration, and loss of gloss. astm d2794 pdf

Understanding ASTM D2794: The Standard Test Method for Resistance of Organic Coatings to the Effects of Rapid Deformation (Impact) The weight strikes the uncoated back side of

At the bottom of the weight is a hemispherical (dome-shaped) indenter. When the weight drops, it strikes an indenter that rests on the coated panel. This creates a rapid deformation, causing the metal substrate to stretch and the coating to expand. Executing the Drops Place the conditioned test panel