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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This practice also covers the preparation of test specimens, and the evaluation of test results.
If in doubt, users should consult the manufacturer xstm their device for clarification. D Temperature is at equilibrium for either an uninsulated or insulated c4587 panel, although the response of the insulated black panel might be slower than that for the uninsulated black panel.
Refer to Practice G for more information about the construction and differences between uninsulated and insulated black panels. Practice asstm been withdrawn and replaced by Practice Gwhich describes performance criteria for all exposure devices that use laboratory light sources, and by Practice Gwhich gives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. The values given in parentheses are for information only. It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results.
Where is it tested? Accelerated weathering simulates damaging effects of long term outdoor exposure of materials and coatings ashm exposing test samples to varying conditions of the most aggressive components of weathering – ultraviolet radiation, moisture and heat.
Industrial maintenance coatings G. However, performance comparisons under the controlled conditions of accelerated weathering can be compared to documented performance of materials and coatings that have experienced extended periods of end use exposure.
Note 1—Previous versions of this practice referenced fluorescent UV devices described by Practicewhich described very specific equipment designs.
Link to Active This link will always route to the current Active version of the standard. These cycles would astn continued for extended periods of time – up to thousands of hours – simulating even longer periods of time in the real world. Table 1 describes commonly used test conditions. Due to copyright restrictions, we are not able to provide copies of standards. B The irradiance set point given is typical for devices operated without irradiance control. C Previous editions of Practice D contained non-mandatory irradiance set points in Table 1 that were commonly used in the industry.
Accelerated Weathering by QUV. Accelerated weathering provides exposed samples for comparison to unexposed control samples.
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 set points shown in this edition of D do not change the actual irradiances that have been historically used by these users. Our laminate is type tested at the renowned international testing laboratory Exova to certify our products to be weather resistant.
Additional exposure cycles are described in Practice G Historical Version s – view previous versions of standard. 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.
Accelerated Weathering by QUV
Often several exposure times such as, and hours also will be compared to each other. Work Item s – proposed revisions of this standard. The exposure used in this practice is not intended to simulate the deterioration caused by localized weather phenomena such as atmospheric pollution, biological attack, and saltwater exposure.
A The cycles described are not listed in any order indicating importance, and are not necessarily recommended for the applications listed. All references to exposures in accordance with this practice must include a complete description of the test cycle used.
The protective gelcoat serves as the first line of defense outdoors against weathering and UV exposures in extreme hot and cold climates. No direct correlation can be made between accelerated weathering duration and actual outdoor exposure duration. Other irradiance levels may be used, but must be described in the report. 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.
Up d44587 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. 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.
Link to Active This link will always route to the current Active version of the standard. 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. This cycle may not adequately simulate the effects of outdoor exposure. ASTM International is an international standards organization that develops awtm publishes voluntary consensus technical standards for a wide range of materials, products, systems, and services.
The standard is primarily based on the external integrity and appearance of our GRP enclosures when exposed to outdoor conditions over an extended period. Typically, flat plaques or disks are used for accelerated weathering studies.
The measurement data used to establish these set points was inaccurate, due to an error in calibration on the part of one manufacturer. The GRP laminate should not display any deterioration like chalking, flaking, wrinkling, blistering or cracking.
To wstm a quote for this test or others Click Here. Our glass reinforced polyester laminate is tested in a controlled laboratory with a simulation of accelerated weather with an exposure cycle of 8 hours UV followed by 4 hours condensation continuously.
ASTM D | Rycobel
Note Previous versions of this practice referenced fluorescent UV devices described by Practice G 53, which described very specific equipment designs. 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. Standards can be obtained from appropriate standards authorities. Active view current version of standard.