ASTM G152 非金属材料曝光用明焰碳弧光仪器操作的标准实施规范

ASTM G152-2021发行信息

标准号ASTM G152-2021

中文名 非金属材料曝光用明焰碳弧光仪器操作的标准实施规范

英文名 Standard Practice for Operating Open Flame Carbon Arc Light Apparatus for Exposure of Nonmetallic Materials

发布日期2021

实施日期

废止日期无

国际标准分类号19.040 (Environmental testing)

发布单位US-ASTM

中国标准分类号H20

ASTM G152-2021适用范围

The use of this apparatus is intended to induce property changes associated with the end use conditions, including the effects of sunlight, moisture, and heat. These exposures may include a means to introduce moisture to the test specimen. Exposures are not intended to simulate the deterioration caused by localized weather phenomena, such as atmospheric pollution, biological attack, and saltwater exposure. Alternatively, the exposure may simulate the effects of sunlight through window glass. Typically, these exposures would include moisture in the form of humidity.

Cautions8212;Refer to Practice G 151 for full cautionary guidance applicable to all laboratory weathering devices. Variation in results may be expected when operating conditions are varied within the accepted limits of this practice. No reference, therefore, shall be made to results from the use of this practice unless accompanied by a report detailing the specific operating conditions in conformance with Section 10. It is recommended that a similar material of known performance, a control, be exposed simultaneously with the test specimen to provide a standard for comparative purposes. It is recommended that at least three replicates of each material evaluated be exposed in each test to allow for statistical evaluation of results.

1.1''This practice covers the basic principles and operating procedures for using open flame carbon-arc light and water apparatus intended to reproduce the weathering effects that occur when materials are exposed to sunlight (either direct or through window glass) and moisture as rain or dew in actual use. This practice is limited to the procedures for obtaining, measuring, and controlling conditions of exposure. A number of exposure procedures are listed in an appendix; however, this practice does not specify the exposure conditions best suited for the material to be tested.

NOTE 1:Practice G151 describes performance criteria for all exposure devices that use laboratory light sources. This practice replaces Practice G23, which describes very specific designs for devices used for carbon-arc exposures. The apparatus described in Practice G23 is covered by this practice.

1.2''Test specimens are exposed to filtered open flame carbon arc light under controlled environmental conditions. Different filters are described.

1.3''Specimen preparation and evaluation of the results are covered in methods or specifications for specific materials. General guidance is given in Practice G151 and ISO 4892-1. More specific information about methods for determining the change in properties after exposure and reporting these results is described in Practice D5870.

1.4''The values stated in SI units are to be regarded as the standard.

1.5''This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.5.1''Should any ozone be generated from the operation of the light source, it shall be carried away from the test specimens and operating personnel by an exhaust system.

1.6''This practice is technically similar to ISO 4892-4.

1.7''This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

1.1“本规程涵盖了使用明火碳弧灯和水设备的基本原理和操作程序，该设备旨在再现材料在实际使用中暴露于阳光（直接或通过窗户玻璃）和雨水或露水等水分时产生的风化效应。本规程仅限于获取、测量和控制暴露条件的程序。附录中列出了许多接触程序；然而，本规程并未规定最适合待测材料的暴露条件。

注1：规程G151描述了使用实验室光源的所有曝光装置的性能标准。本规程取代了规程G23，该规程描述了用于碳弧曝光的装置的非常具体的设计。规程G23中所述的装置包括在本规程中。

1.2“试样在受控环境条件下暴露于过滤明火碳弧光下。描述了不同的滤波器。

1.3“试样制备和结果评估”包含在特定材料的方法或规范中。一般指南见实施规程G151和ISO 4892-1。规程D5870中描述了关于确定暴露后性质变化和报告这些结果的方法的更多具体信息。

1.4“以国际单位制表示的数值应视为标准值。

1.5“本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。

1.5.1“如果光源运行产生任何臭氧，应通过排气系统将其从试样和操作人员处带走。

1.6“本规程在技术上与ISO 4892-4相似。

1.7“本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。