의미와 목적
4.1 많은 응용 분야의 경우, the ability of a paint or coating to resist deterioration of physical and optical properties due to exposure to light, 열, and water may be very important. This practice aims to cause changes in attributes related to end-use conditions, including the effects of sunlight, 수분, and heat. The exposures used in this practice are not intended to model the deterioration caused by local weather phenomena such as atmospheric pollution, biological attack, and saline-water exposure.

4.2 Caveats – Results may change when different operating conditions are used. 그러므로, no reference to the use of this practice may be made unless accompanied by a report prepared under Section 10 describing the specific operating conditions used. See Practice G151 for details of the caveats applicable to the use of the results obtained under this practice.

메모 1: 가변성의 원인과 설계의 가변성을 해결하기 위한 전략에 대한 추가 정보, 실행, and data analysis of laboratory accelerated exposure trials, 가이드 G141 참조.

4.2.1 The spectral power profiles of light from unfiltered open flame carbon arcs are significantly different from those generated by light and water exposure devices using other carbon arc configurations or other light sources. The type and rate of degradation and performance ranking resulting from exposure to unfiltered open flame carbon arcs may be quite different from those resulting from exposure to other types of laboratory light sources. 일반적으로, exposure in accordance with this protocol will produce degradation more rapidly than similar exposure in accordance with practice D822/D822M or D5031/D5031M and may result in different types of degradation.

4.2.2 Inter-laboratory comparisons are valid only if all laboratories use the same type of carbon arc and exposure conditions.

ASTM D 3361-2020 “페인트 및 관련 코팅의 여과되지 않은 화염 탄소 아크 노출 테스트”

4.3 The reproducibility of test results between laboratories has been shown to be good when evaluating the stability of the material according to the performance class compared to other materials or controls. IV,5 그러므로, it is highly recommended to expose similar materials with known properties (제어) 시험자료와 동시에. At least three replications of each material are recommended to allow statistical evaluation of the results.

4.4 Test results will depend on the degree of care with which the equipment is operated in accordance with Practice G152. Important factors include regulation of line voltage, absence of salt or other water deposits, temperature and humidity control, and electrode conditions.

4.5 All exposures referred to in accordance with this practice shall include a complete description of the test period used.

범위
1.1 This specification covers the selection of test conditions for accelerated exposure testing of coatings and related products in unfiltered open-flame carbon arc installations in accordance with regulations G151 and G152. The practice also includes preparation of specimens, suitable test conditions for coatings, and evaluation of test results.

1.2 This practice covers the unfiltered open-flame carbon arc exposure of paints and associated coatings and covers the exposure period commonly referred to as the “dew cycle”. Practice D822/D822M describes the filtered open flame carbon arc device and Practice D5031/D5031M describes the closed carbon arc exposure. Radiation from unfiltered open flame carbon arcs produces shorter wavelengths and higher levels of shortwaver radiation compared to filtered open flame or closed carbon arcs.

ASTM D 3361-2020 “페인트 및 관련 코팅의 여과되지 않은 화염 탄소 아크 노출 테스트”

1.3 Values expressed in SI units or inch-pound units should be treated separately as standard values. 각 시스템에 지정된 값이 반드시 동일할 필요는 없습니다.; 그러므로, 표준 준수를 보장하기 위해, 각 시스템은 서로 독립적으로 사용해야 하며 두 시스템의 값을 결합해서는 안 됩니다..

1.4 이 표준은 모든 안전 문제를 다루기 위한 것이 아닙니다., 만약에 어떠한, 그 사용과 관련된. 적절한 안전을 확립하는 것은 이 표준 사용자의 책임입니다., 건강 및 환경 관행을 확인하고 사용 전 규제 제한의 적용 여부를 결정합니다..

1.5 본 국제 표준은 국제 표준 개발 원칙에 관한 결정에서 확립된 국제적으로 인정받는 표준화 원칙에 따라 개발되었습니다., 세계무역기구(WTO) 무역기술장벽위원회가 발행한 지침 및 권고사항.