5. Apparatus
5.1 Application Equipment, as described in Practices D823.
5.2 Film-Thickness Measuring Apparatus, as described in
Test Method D1005 or Practice D7091.
5.3 Balanced Beam, Scrape Adhesion Tester (Figs. 1 and 2),
consisting of a balanced beam to which is secured a platform
for supporting weights, and a rod at an angle of 45° that holds
the scraping loop. The rod shall be set so that the scraping loop
contacts test surfaces directly below the weights. The loop
shall be 1.6-mm (1⁄16-in.) diameter rod, bent into a “U” shape
with an outside radius of 3.25 6 0.05 mm (0.128 6 0.002 in.)
and hardened to Rockwell HRC 56 to 58, and shall be a smooth
finish. The loop can be either chromium plated, nickel plated,
or heat treated polished steel, as agreed upon between the
purchaser and the supplier. These testers are adjustable to
accommodate flat, metallic, and nonmetallic specimens to
12-mm (0.5-in.) thick and 100 to 400 mm (4 to 16 in.) wide and
long; the specimen should be at least 12-mm (1⁄2-in.) wide.