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ASTM G152-13

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

Automaticky přeložený název:

Standardní praktiky pro operační otevřeného ohně Carbon Arc Light Přístroj pro expozici nekovových materiálů

NORMA vydána dne 1.7.2013

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Dostupnost	SKLADEM
Cena	2 020.00 Kč bez DPH
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Informace o normě:

Označení normy: ASTM G152-13
Poznámka: NEPLATNÁ
Datum vydání normy: 1.7.2013
Kód zboží: NS-57441
Počet stran: 10
Přibližná hmotnost: 30 g (0.07 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM

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Kategorie - podobné normy:

Zkoušení vnějších vlivů a zkoušení ve vnějším prostředí

Anotace textu normy ASTM G152-13 :

Keywords:

accelerated, accelerated weathering, carbon arc, durability, exposure, laboratory weathering, light, lightfastness, nonmetallic materials, open flame carbon arc, sunshine carbon arc, temperature, ultraviolet, weathering, ICS Number Code 19.040 (Environmental testing)

Doplňující informace

Significance and Use

5.1 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.

5.2 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 5.2.1 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 best practice to use control materials known to have relatively poor and good durability. 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. Scope

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.

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 and health 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.

2. Referenced Documents

CIE-Publ. No. 85:	Recommendations for the Integrated Irradiance and the Spectral Distribution of Simulated Solar Radiation for Testing Purposes Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
G151-19	Standard Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light Sources
G113-22	Standard Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials
G23-96	Practice for Operating Light-Exposure Apparatus (Carbon-Arc Type) With and Without Water for Exposure of Nonmetallic Materials (Withdrawn 2000)
E691-23	Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
D3980-88	Practice for Interlaboratoy Testing of Paint and Related Materials (Withdrawn 1998)
D5870-22	Standard Practice for Calculating Property Retention Index of Plastics