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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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 Whether your business is local or global, astk can ensure your products meet quality, health, environmental, safety, and social ast, standards for virtually any market around the world.
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. ASTM D classification defines the standard practice for fluorescent UV and condensation exposures of paint and related coatings.
This cycle may not adequately simulate the effects of outdoor exposure. Nondestructive instrumental measurements are recommended whenever possible. Other irradiance levels may be used, but must be described in the report. Link to Active This link will always route to the current Active version of the standard. The standard is primarily based on the external integrity and appearance of our GRP enclosures when exposed to outdoor conditions over an extended period.
Measure ambient temperature at a maximum distance ast, mm 6 in. Individual reprints single or multiple copies of this standard may be obtained wstm contacting ASTM at the above address or at phonefaxor service astm. No direct correlation can be made between axtm weathering duration and actual outdoor exposure duration. Typically, flat plaques or disks are used for accelerated weathering studies. A QUV test chamber uses fluorescent lamps to provide a d458 spectrum centered in the ultraviolet wavelengths.
Measurements visual or instrumental should be made within a standardized time period or as agreed upon between interested parties.
A The cycles described are not listed in any order indicating importance, and are not necessarily recommended for the applications listed. 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 qstm the control material. F SAE J describes the test used in many automotive speci?
Practice has 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.
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 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 for many applications.
Do not use arbitrary acceleration factors relating time in an exposure conducted according to this practice and time in an outdoor environment because they can give erroneous information. Table 1 describes commonly used test conditions.
In devices that do not have a planar exposure area, reposition specimens using a procedure agreed upon by all interested parties. 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.
It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results. Send us a request Need help or have a question? NOTE 6—Since the stability of the?
Assurance Testing Inspection Certification. Standards can be obtained from appropriate standard authorities.
ASTM D classification test for weather and UV resistance
Expose replicates of the test specimen and the control specimen so that statistically signi? How is it tested? Parts may be accommodated depending on size. Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes.
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Where is it tested? Aastm practice is intended to induce property changes associated with end-use d44587, including the effects of sunlight, moisture, and heat. G Historical convention dd4587 established this as a very commonly used awtm cycle.
Refer to Practice G for more information about the construction and differences between uninsulated and insulated black panels.
The measurement data used to establish these set points was inaccurate, due to an error in calibration on the part of one manufacturer. Auditing Consulting Sourcing Training. Thereafter the simulation, the GRP laminate is physically inspected and compared to a control specimen. This practice is intended to induce property changes associated with end-use conditions, including the effects of sunlight, moisture, and heat. Industrial maintenance coatings G.
If in doubt, users should consult the manufacturer of their device asfm clarification. The type and rate of degradation and the performance rankings produced in exposures to? Often several exposure times such as, and hours also will be compared to each other. The GRP laminate should not display any deterioration like chalking, flaking, wrinkling, blistering or cracking.
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 number in parentheses indicates the year of last reapproval.
Seal any holes in specimens larger than 2 mm 0.