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ASTM G153-13

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

Automaticky přeložený název:

Standardní praktiky pro operační Uzavřené Carbon Arc Light Přístroj pro expozici nekovových materiálů

NORMA vydána dne 1.7.2013

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Dostupnost	SKLADEM
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Informace o normě:

Označení normy: ASTM G153-13
Poznámka: NEPLATNÁ
Datum vydání normy: 1.7.2013
Kód zboží: NS-57447
Počet stran: 9
Přibližná hmotnost: 27 g (0.06 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 G153-13 :

Keywords:

accelerated, accelerated weathering, carbon arc, durability, enclosed carbon arc, exposure, laboratory weathering, light, lightfastness, nonmetallic materials, 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. Therefore, no reference 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 enclosed 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 enclosed carbon arc light under controlled environmental conditions.

1.3 Specimen preparation and evaluation of the results are covered in various 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 ISO 4582.

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.

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 Secretary, U.S. National Committee, CIE, National Institute of Standards and Technology, Gaithersburg, MD 20899.
ISO 4892-4	Plastics--Methods of Exposure to Laboratory Light Sources, Part 4, Open-Flame Carbon Arc Lamp
ISO 4892-1	Plastics--Methods of Exposure to Laboratory Light Sources, Part 1, General Guidance
ISO 4582	Plastics--Determination of the Changes of Colour and Variations in Properties After Exposure to Daylight Under Glass, Natural Weathering or Artificial Light 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)
D3980-88	Practice for Interlaboratoy Testing of Paint and Related Materials (Withdrawn 1998)
E691-23	Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

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