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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This condition requires that axtm procedures described in 8. This practice is intended to induce property changes associated with end-use conditions, including the effects of sunlight, moisture, and heat.
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. NOTE 6—Since the stability of the? Assurance Testing Inspection Certification.
Baked coatings Radiation-cured coatings All other coatings 24 h 24 h 7 days 5. Periods of Exposure and Evaluation of Results 9. Work Item s – proposed revisions of this c4587.
ASTM D _UV_resistance_百度文库
The set points shown in this edition of D do not change the actual irradiances that have been historically used by these users. Select panel sizes suitable for use with the exposure apparatus. Historical Version s – view previous versions of standard. C Previous editions of Practice D contained non-mandatory irradiance set points in Table 1 that were commonly used in the industry.
Therefore, no reference to the use of this practice shall be made unless accompanied by a report prepared according to Section 10 that describes the speci? Significant factors include regulation of line voltage, temperature of the room in which the device operates, temperature control, and condition and age of the lamps. If in doubt, users should consult the manufacturer of their device for clari? It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results.
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 references to exposures in accordance with this practice must include a complete description of the test cycle used.
Do not place the apparatus near a heat source such as an oven. The standard is primarily based on the external integrity and appearance of our GRP enclosures when exposed to outdoor conditions over an extended period. The standardized time period needs to consider conditioning prior to testing.
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. Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes.
G Historical convention has established this as a very commonly used test cycle. Additional exposure cycles are described in Practice G Turn the device off before removing panels for inspection.
This practice also covers the preparation of test specimens, and the evaluation of test results. Nondestructive instrumental measurements are recommended whenever possible. Where is it tested?
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. Industrial maintenance coatings G.
However, for users of equipment made by another manufacturer, the irradiance control system did not have the measurement inaccuracies described ast, so running at the new set points will represent a change in the actual irradiance of the test. This method is preferred over evaluating materials after an arbitrary exposure time or radiant exposure.
Validating the specifications, value and safety of your raw e4587, products and assets. The acceleration factor is material dependent and is only valid if it is based on data from a sufficient number of separate exterior and laboratory accelerated exposures so that results used to relate times to failure in each exposure can be analyzed using statistical methods. Obtain agreement between all concerned parties for the speci?
The type and rate of degradation and the performance rankings produced in exposures to? Other irradiance levels may be used, but must be described in the report.
Need help or have a question? 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. G Historical convention has established this as a very commonly used test cycle. Cautions Variation in results may be expected when different axtm conditions are used. Refer to Practice G for more information about the construction and differences between uninsulated and insulated black panels.
NOTE 9—An example of a statistical analysis using multiple laboratory and exterior exposures to calculate an acceleration factor is described by J. Parts may be accommodated depending on size.
The previous set points were 0.