意味と目的
4.1 The procedures described in this specification are intended to assist in the evaluation of coating performance on a variety of metal panels, including new or rusted steel.

4.2 Due to differences in solar radiation, wet time, 温度, contaminants, およびその他の要因, the relative durability of paint during outdoor exposure may vary considerably depending on the location of the exposure. したがって, it cannot be assumed that the results of a single exposure at a single location will help determine the relative durability of different locations. Exposure is recommended at multiple sites with different climates that represent a wide range of expected service conditions.

4.2.1 Due to annual climate variability, the results of a single exposure test cannot be used to predict the absolute rate of material degradation. It takes several years of repeated exposure to obtain an “average” test result for a given location.

4.2.2 Solar radiation varies greatly with the time of year. This can lead to large differences in apparent degradation rates for many polymers. It is not recommended to compare results for materials exposed for a short period of time (less than one year) unless the materials were exposed at the same location at the same time.

4.3 Meaning and Use of G7 in practice addresses many of the variables that need to be considered in external exposure testing. Guide G141 provides more information on variability in aging tests.

ASTM D 1014-2018 “金属基材上の脅威となる塗料およびコーティングの屋外暴露試験”

の範囲
1.1 This practice covers the procedures to be followed when exposing external paints and coatings directly to metal surfaces. When the sponsor actual exposure of the aging test is carried out by a separate agency, the specific conditions for testing and controlling the exposure of the specimen should be clearly defined and mutually agreed upon by the parties.

1.2 Experience has shown that the metal used as a test substrate has a significant impact on weathering results. The aim of this practice is to define specific steel and other metal surfaces for testing in order to minimize this source of variability.

1.3 SI単位で表した値を基準とします。. 括弧内の値は参考値です。.

1.4 この規格は、すべての安全問題に対処することを目的としたものではありません, もしあれば, その使用に関連する. 適切な安全性を確立するのは、この規格の使用者の責任です。, 健康および環境慣行を確認し、使用前に規制制限の適用可能性を判断するため.

1.5 この国際規格は、国際規格開発の原則に関する決定で確立された国際的に認められた標準化原則に従って開発されました。, 世界貿易機関の貿易の技術的障壁に関する委員会が発行したガイドラインと勧告.