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. Find the most up-to-date version of ASTM D at Engineering Purchase your copy of ASTM D – 13 as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards available.
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A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the V1499 of Defense.
This practice also covers the Light D149 for Exposure of Nonmetallic Materials preparation of test specimens, the test condition suited for G Practice for Operating Enclosed Carbon-Arc Light plastics, and the evaluation of test results.
Apparatus for Exposure of Nonmetallic Materials 1.
ASTM D 操纵塑料暴露用曝光和曝水装置(碳弧型).pdf全文-调研报告-在线文档
Terminology safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- 3. This practice is intended to induce property D Practice for Interlaboratory Testing of Paint and changes associated with end-use conditions, including the Related Materials effects of sunlight, moisture, and heat. The exposure used in D Practice for Calculating Property Retention Index this practice is not intended to simulate the deterioration caused of Plastics by localized weather phenomena, such as, atmospheric pollu- D Practice for Enclosed Carbon-Arc Exposures of tion, biological attack, and saltwater exposure.
Warning— Plastics Variation in results may be expected when operating conditions E Practice for Conducting an Interlaboratory Study d11499 are varied within the wstm limits of this practice. Refer to G Guide satm Addressing Variability in Exposure Testing Practice G for detailed information on the caveats appli- on Nonmetallic Materials cable to use of d14999 obtained in accordance with this G Practice for Conditioning and Handling of Nonme- practice.
NOTE 2—Additional information on sources of variability and on strategies for addressing variability in the design, execution, and data 1 This practice is under the jurisdiction of ASTM Committee D20 on Plastics and analysis of laboratory-accelerated exposure tests is found in Guide G Current edition approved July 1, Awtm previous edition approved in as D – It is recommended Instrumental measurements are recommended whenever possible.
Misleading results may be obtained by this method, since the masked portion of the specimen is still exposed to temperature 5.
Apparatus and humidity cycles that in many cases will affect results. If the irradiance at any position within the exposure 6. All con- holder shall be covered. This unexposed surface must not be cerned parties must agree on the control material used. When necessary, to provide 7. When the test specimens cate specimens of each test and control material.
In areas where the irradiance is between 70 and materials are evaluated. Additional intervals and methods of wetting, by spray, condensation, or immersion, or a combination of these, may be substituted upon 4 Fischer, R.
Ketola and Douglas Grossman, eds. If the ments described in 7.
ASTM D1499 – 13
When this type of test is required, omit the period the disagreement before continuing. The set point is the x1499 condition for the 8. Periods of Exposure and Evaluation of Test Results sensor used at the asrm control point as programmed by the user. Therefore, when a standard calls 8.
Continuous light with equilibrium uninsulated black 8. When a single exposure period is light with water sprayed on the test specimens. For light intervals less than 30 min, the maximum black 8. Do not use arbitrary acceleration factors asgm. The acceleration factor is material- important. Without proper treatment to remove cations, anions, dependent and is only valid if it is based on data from a organics, and particularly silica, exposed panels will develop sufficient number of separate exterior and laboratory- spots or stains that may not occur in exterior exposures.
On some described by Simms.
However, if ambient tempera- or as agreed upon between the interested parties. Conduct these lengths in which the measurements were made. Do not report irradiance or radiant exposure unless 8.
If light and dark measurement process. If light and dark periods are employed, conducted f1499 accordance with this practice has not been report the relative humidity set point for each period. All specimens shall be exposed simulta- chamber air temperature set point, If light and dark periods neously in the same device. Expose replicates of the test specimen silica level of water used for specimen spray, if above limits and the control specimen so that.