ASTM G152-2021

ASTM G152 非金屬材料曝光用明焰碳弧光儀器操作的標準實施規范

ASTM G152-2021發行信息

標準號ASTM G152-2021

中文名 非金屬材料曝光用明焰碳弧光儀器操作的標準實施規范

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

發布日期2021

實施日期

廢止日期無

國際標準分類號19.040 (Environmental testing)

發布單位US-ASTM

中國標準分類號H20

ASTM G152-2021適用范圍

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“本規程涵蓋了使用明火碳弧燈和水設備的基本原理和操作程序，該設備旨在再現材料在實際使用中暴露于陽光（直接或通過窗戶玻璃）和雨水或露水等水分時產生的風化效應。本規程僅限于獲取、測量和控制暴露條件的程序。附錄中列出了許多接觸程序；然而，本規程并未規定最適合待測材料的暴露條件。

注1：規程G151描述了使用實驗室光源的所有曝光裝置的性能標準。本規程取代了規程G23，該規程描述了用于碳弧曝光的裝置的非常具體的設計。規程G23中所述的裝置包括在本規程中。

1.2“試樣在受控環境條件下暴露于過濾明火碳弧光下。描述了不同的濾波器。

1.3“試樣制備和結果評估”包含在特定材料的方法或規范中。一般指南見實施規程G151和ISO 4892-1。規程D5870中描述了關于確定暴露后性質變化和報告這些結果的方法的更多具體信息。

1.4“以國際單位制表示的數值應視為標準值。

1.5“本標準并非旨在解決與其使用相關的所有安全問題（如有）。本標準的使用者有責任在使用前建立適當的安全、健康和環境實踐，并確定監管限制的適用性。

1.5.1“如果光源運行產生任何臭氧，應通過排氣系統將其從試樣和操作人員處帶走。

1.6“本規程在技術上與ISO 4892-4相似。

1.7“本國際標準是根據世界貿易組織技術性貿易壁壘（TBT）委員會發布的《關于制定國際標準、指南和建議的原則的決定》中確立的國際公認標準化原則制定的。