Adhesive tape test polyolefin anticorrosive layer of impact resistance experiment method
a: equipment requirements
1, impact tester, vertical pipe run, mainly includes the impact hammer pipe inner surface is smooth, guarantee the impact hammer free fall; Impact hammer ball punch, diameter of 25 mm; Level of sample tube fixed frame;
2, electric spark leak detector, 0 kv ~ 30 kv.
3, thickness gauge 0 mm to 5 mm.
2: test section specimen size of DN100 x 350 mm, each set of specimens for two.
3: test steps:
1, the specimen under the condition of 20 ℃ to 23 ℃ + placed at least 2 hours.
2, the specimen on the level of impact testing machine specimen fixed frame, to ensure that the impact hammer head is perpendicular to the surface of the specimen.
3, adjust the impact energy to the specified value, the impact of specimens of each specimen impact 10 times, each interval of at least 30 mm at two o 'clock.
4: voltage leak detection, 10 times in no funnelled to pass.