This standard is issued under the fixed designation D; the number 1 This practice is under the jurisdiction of ASTM Committee D01 on Paint and. Related. ASTM D defines fluorescent UV and condensation exposures of paint and related coatings,equivalent to ISO 31 Aug ASTM D _UV_resistance – Designation: D – 05 Standard Practice for Fluorescent UV-Cond.
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The standard sample holders can hold one sample 3 x 12 inches 75 x mm or two samples 3 x 6 inches 75 x mm. Note 1—Previous versions of this practice referenced fluorescent UV devices described by Practicewhich described very specific equipment designs. The type and rate of degradation and the performance rankings produced in exposures to fluorescent UV lamps can be much different from those produced by exposures to other types of laboratory light sources.
A The cycles described are not listed in any order indicating importance, and are not necessarily recommended for the applications listed. Our laminate is type tested at the renowned international testing laboratory Exova to certify our products to be weather resistant.
Work Item s – proposed revisions of this standard. A QUV test chamber uses fluorescent lamps to provide a radiation spectrum centered in the ultraviolet wavelengths. 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.
Up to 20 test samples are mounted in the QUV and subjected to a cycle of exposure to intense ultraviolet radiation followed by moisture exposure by condensation. Due to copyright restrictions, we are not able to provide copies of standards. The set points shown in this edition of D do not change the actual irradiances that have been historically used by these users. Referenced Documents purchase separately The documents c4587 below are referenced within the subject standard but are not provided as part of the standard.
Refer to Practice G for detailed information on the caveats applicable to use of results obtained according to this practice. G Historical convention has established this as a very commonly used test cycle. Refer to Practice G for more information about the construction and differences between uninsulated and insulated black panels.
Therefore, no reference to the use of this practice shall be made unless accompanied by a report prepared according to Section 10 that describes the specific operating conditions used.
ASTM International is an international standards organization that develops and publishes voluntary consensus technical standards for a wide range of materials, products, systems, and services. Reproducibility of test results between laboratories has been shown to be good when the stability of materials is evaluated in terms of astn ranking compared to other qstm or to a control. E Typical uses do not imply that results from exposures of these materials according to the cycle described will correlate to those from actual use conditions.
The ability of a paint or coating to resist deterioration of its physical and optical properties caused by exposure to light, heat, and water can be very significant for many applications. However, performance comparisons under the controlled conditions of accelerated weathering can be compared to documented r4587 of materials and coatings that have experienced extended periods of end use exposure.
However, for users of equipment made by another manufacturer, the irradiance control system did not have the measurement inaccuracies described above, so running at the new set points will represent a change in the actual irradiance of the test. Note 3—Additional information on sources of variability and on strategies for addressing variability in the design, d458 and data analysis of laboratory accelerated exposure tests is found in Guide G Cautions Variation in results may be expected when different operating conditions are used.
Standards can be aastm from appropriate standards authorities. If in doubt, users should consult the manufacturer of their device for clarification.
C Previous editions of Practice D contained non-mandatory irradiance set points in Table 1 that were commonly used in the industry. Often several exposure times such as, and hours also will be compared to each other. Adherence to the standard is mandatory across the GCC region and globally. B The irradiance set point given is typical for devices operated without irradiance control.
Where is it tested? Note Previous versions of this practice referenced fluorescent UV devices described by Practice G 53, which described very specific equipment designs.
ASTM D _UV_resistance_百度文库
atm Practice G 53 has been withdrawn and replaced by Practice Gwhich describes performance criteria for all exposure devices that use laboratory light sources, and by Practice Gwhich gives requirements for exposing nonmetallic materials in fluorescent UV devices.
Accelerated Weathering by QUV. The protective gelcoat serves as the first line of defense outdoors against weathering and UV exposures in extreme hot and cold climates.