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.
|Published (Last):||15 February 2011|
|PDF File Size:||18.36 Mb|
|ePub File Size:||14.17 Mb|
|Price:||Free* [*Free Regsitration Required]|
Historical Version s – view previous versions of standard. Accelerated weathering simulates damaging effects of long term outdoor exposure of materials and coatings.
Accelerated Weathering (QUV) ASTM G154, ASTM D4329, ASTM D4587, ISO 4892
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. When a single exposure period is used, select a time asmt radiant exposure that will produce the largest performance differences between the test materials or between the test material and the control material.
This practice is intended to induce property changes associated with end-use conditions, including the effects of sunlight, moisture, and heat. The previous set points were 0. This practice also covers the preparation of test specimens, and the evaluation of test results.
Measure ambient temperature at a maximum distance of mm 6 in. 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.
Expose replicates of the test specimen and the control specimen so that statistically signi? Water resistance of th Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. ASTM D classification defines the standard practice for fluorescent UV and condensation exposures of paint and related coatings. The standardized time period needs to consider conditioning prior to testing. Refer to Practice G for more information about the construction and differences between uninsulated and asrm black panels.
Work Item s – proposed revisions of this standard. Reproducibility of test results between dd4587 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. It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results.
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 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. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations ast to use.
NOTE 10—For some materials, changes may continue after the speci- 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.
NOTE 6—Since the stability of the? A QUV test chamber uses fluorescent lamps to provide a radiation spectrum centered in the ultraviolet wavelengths. Additional intervals aatm periods of condensation may be substituted upon agreement among the concerned parties. C Previous editions of Practice D contained non-mandatory irradiance set points in Table 1 that were commonly used in the industry. In devices that do not have a planar exposure area, reposition specimens using a procedure agreed upon by all interested parties.
Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. 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.
Table 1 describes commonly used test conditions. Nondestructive methods are preferred because panels so measured need not be repaired.
ASTM D _UV_resistance_百度文库
Precision and Bias The values given in parentheses are for information only. Interlaboratory comparisons are valid only when all laboratories use the same design of fluorescent UV device, lamp, and exposure conditions. 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.