Kahulugan at Layunin
4.1 The owner considers the coating fragmentation to be unacceptable, especially on the front surface and edges of the car surface. Resistance to fragmentation damage from flying objects such as gravel is one of the important characteristics when preparing a coating or coating system to meet service requirements, as it can vary greatly as other characteristics are adjusted. Since fragmentation resistance is reduced at lower temperatures, partly due to reduced flexibility, the test may be more directly related to the conditions of use by conducting the test at low temperatures. The test method is designed to produce a controlled amount of impact through the medium on the coated panel to improve repeatability.

ASTM D3170-2022 Coating Resistance to Fragmentation

Saklaw ng
1.1 The test method includes determining the resistance of the coating to fragmentation damage by stones or other flying objects.

Tala 1: This test method is similar to SAE J-400.

1.2 All dimensions are nominal unless otherwise stated.

1.3 Values expressed in SI units or inch-pound units should be treated separately as standard values. The values specified in each system are not necessarily the same; Kaya nga, to ensure compliance with the standards, each system should be used independently of each other and the values of the two systems should not be combined.

ASTM D3170-2022 Coating Resistance to Fragmentation

1.4 Ang pamantayang ito ay hindi nilayon upang matugunan ang lahat ng mga isyu sa kaligtasan, kung meron man, na nauugnay sa paggamit nito. Responsibilidad ng gumagamit ng pamantayang ito na magtatag ng angkop na kaligtasan, mga kasanayan sa kalusugan at kapaligiran at upang matukoy ang pagiging angkop ng mga paghihigpit sa regulasyon bago gamitin.

1.5 Ang internasyonal na Pamantayang ito ay binuo alinsunod sa mga internasyonal na kinikilalang prinsipyo ng standardisasyon na itinatag sa Desisyon sa mga Prinsipyo para sa Pag unlad ng Internasyonal na Pamantayan, Mga Patnubay at Rekomendasyon na inilabas ng Komite sa mga Teknikal na Hadlang sa Kalakalan ng World Trade Organization.