The Test Protocol that was followed is an adaptation of ASTM D where 1E 1E Buy ASTM D PRACTICE FOR FLUORESCENT UV EXPOSURE OF PLASTICS from SAI Global. ASTM D Standard Practice for Fluorescent UV Exposure of Plastics. This practice covers specific procedures and test conditions that are applicable.
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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.
Warning— Variation in results may be expected when operating conditions are varied within the accepted limits of this e4329-05. Whether your business is local or global, we can ensure your products meet quality, health, environmental, safety, and social accountability standards for virtually any market around the world. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Parts may be accommodated depending on size.
Accelerated Weathering (QUV) ASTM G154, ASTM D4329, ASTM D4587, ISO 4892
An exposure time that astn a astj change in one type of material cannot be assumed to be applicable to other types of materials. Unless supplied with a specic backing as an integral part of the test, specimens shall be mounted so that only the minimum specimen area required for support by the holder shall be covered.
This standard is also available to be included in Standards Subscriptions. All specimens shall be exposed simultaneously in the same device. Formally confirming that your products and services meet all trusted external and internal standards. Misleading results may be obtained by this method, since the masked portion of the specimen is still exposed to temperature and humidity cycles that in many cases will affect results.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM d439-05 the above address or at phonefaxor service astm.
You may delete a document from your Alert Profile at any time. Originally approved in Signicance and Use 4. Often several exposure times such as, and hours also will be compared to each other. Operate the device continuously. Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes.
Global Reach Intertek is the industry leader with over 42, people in 1, locations in over countries. Precision and Bias Signicant factors include regulation of line voltage, temperature of the room in which the device operates, temperature control, and condition and age of the lamp. Calculate retention of characteristic property in accordance with Practice D when it is reported.
Accelerated Weathering (QUV) ASTM G, ASTM D, ASTM D, ISO
asrm Certification Formally confirming that your products and services meet all trusted external and internal standards. Standards can be obtained from appropriate standard authorities. The standardized time period needs to consider conditioning prior to testing. Last previous edition approved in as D – NOTE 4—This is especially important when mechanical properties are being investigated.
Obtain mutual agreement d4329-005 all concerned parties for the specic exposure cycle used. 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. If four specimens are stacked vertically, then the specimens should be repositioned vertically three times during the test. A number in parentheses indicates the year of last reapproval. When a single exposure period is used, select a time or radiant exposure that will produce the largest performance differences between the test materials or between the test material and the control material.
All concerned parties must agree on the control material used.
For instance, if two specimens are stacked vertically in each holder, then the top and bottom specimens should switch places halfway through the test. No direct correlation can be made between accelerated weathering duration and actual outdoor exposure duration.
Current edition approved July 15, Please first log in with a verified email before subscribing to alerts. Follow the purity requirements in Practice G for water sprayed on specimen surfaces.
Ashm practical, it is recommended that specimens be sized to t specimen holders and racks supplied with the exposure apparatus. 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.
Need help or have a question? Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
Accelerated weathering aztm damaging effects of long term outdoor exposure of materials and coatings. 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.