ASTM D4587 PDF

ASTM D defines fluorescent UV and condensation exposures of paint and related coatings,equivalent to ISO 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 Standard Practice for Fluorescent UV-Condensation Exposures of Paint and Related Coatings CONTAINED IN VOL. , Outlines test.

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Refer to Practice G for more information about the construction and differences between uninsulated and insulated black panels.

ASTM D4587

A superscript epsilon e indicates an editorial change since the last revision or reapproval. Do not use this covered area of the specimen as part of the test area. The standardized time period needs to consider conditioning prior to testing. D Temperature is at equilibrium for either an uninsulated or insulated black panel, although the response of the insulated black panel might be slower than that for the uninsulated black panel.

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This cycle may not adequately simulate the d44587 of outdoor exposure. Consider product use requirements when selecting appropriate methods. F SAE J describes the test used in many automotive speci?

An exposure time that produces a signi? Reproducibility of test results between laboratories has been shown to be good when the stability of materials is evaluated in terms of performance ranking compared to other materials or to a control. Interlaboratory comparisons are valid only when all laboratories use the same design of fluorescent UV device, lamp, and exposure conditions.

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.

A The cycles described are not listed in any order indicating importance, and are not necessarily recommended for the applications listed. Where is it tested? The measurement data used to establish these set points was inaccurate, due to an error in calibration on the part of one manufacturer. Therefore, xstm reference to the use of this practice shall be made unless accompanied by a report prepared according to Section 10 that describes the speci?

G Historical convention has established aatm as a very commonly used test cycle. Water resistance of th The GRP laminate should not display any deterioration like chalking, flaking, wrinkling, blistering or cracking. Attach porous specimens to a solid backing such as aluminum that can act as a vapor barrier.

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Refer to Practice G for more information about the construction and differences between uninsulated and insulated black panels.

ASTM D _UV_resistance_百度文库

Table 1 describes commonly used test conditions. G Historical convention has established this as a very commonly used test cycle. The previous set points were 0. When specimens are removed from the exposure apparatus for 24 h or more, then returned for additional exposure, report the elapsed time as noted under Section NOTE 9—An example of a statistical analysis using multiple laboratory and exterior exposures to calculate an acceleration astk is described by J.

Table 1 describes commonly used test conditions. 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.

Seal any holes in specimens larger than 2 mm 0. If you feel that your comments have not received a fair hearing you should make d587 views asm to the ASTM Committee on Standards, at the address shown below.

It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results. 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.

ASTM D classification test for weather and UV resistance

Do not place the apparatus near a heat source such as an oven. Practice G 53 has been withdrawn and replaced by Practice Atsmwhich 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.

It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results. These cycles would be continued for extended periods of time – up to thousands of hours – simulating even longer periods of time in the real world.

Where retention of characteristic property is reported, calculate results according to Practice D Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Work Item s – proposed revisions of this standard. 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.

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Adherence to the standard is mandatory across the GCC region and globally. Therefore, no reference to the use astj this practice shall be made unless accompanied by a report prepared according to Section 10 that describes the specific operating conditions used.

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. 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 type and rate of degradation and the performance rankings produced in exposures to? B The irradiance set point given is typical for devices operated without irradiance control. Note 3—Additional information on sources of variability and on strategies for addressing variability in the design, execution and data analysis of laboratory accelerated exposure tests is found in Guide G The protective gelcoat serves as the first line of defense outdoors against weathering and UV exposures in extreme hot and cold climates.

If in doubt, users should consult the manufacturer of their device for clari? Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

Test results will depend astn the care that is taken to operate the equipment according to Practice G Control of ambient temperature is particularly critical when one apparatus is stacked above another, because the heat generated from the lower unit can interfere with the operation of the units above.

Standards can be obtained from appropriate standard authorities. F Typical UsesE Automotive coatingsF 2 Industrial maintenance coatingsG 3 Exterior wood coatings 4 General metal coatings A The cycles described are not listed in any order indicating importance, and are not necessarily recommended for the applications listed.

Formally xstm that your products and services meet all trusted external and internal standards. Select panel sizes suitable for use with the exposure apparatus.