Wat is PDF Music ASTM D2247 PDF

ASTM D2247 PDF

This standard is issued under the fixed designation D ; the 1 This practice is under the jurisdiction of ASTM Committee D01 on Paint and. ASTM D Testing Water Resistance in % RH. Can be used to test the water resistance of coatings by exposing coated specimens to a high relative. ACCELERATED LIFE TESTING. Touchstone performs corrosion testing and accelerated life testing of virtually any material or device. Among the tests offered .

Author: Akinohn Nimuro
Country: Netherlands
Language: English (Spanish)
Genre: Marketing
Published (Last): 15 July 2018
Pages: 486
PDF File Size: 6.23 Mb
ePub File Size: 12.16 Mb
ISBN: 658-1-22809-592-9
Downloads: 3975
Price: Free* [*Free Regsitration Required]
Uploader: Dotaur

Short interruptions to inspect or remove specimens are permitted, but such zstm should occur no more than once each day. NOTE 3—Due to heat loss to the specimens and the walls of the chamber where a heated water tank is used, the temperature of the water in the tank will be above the temperature of the air and water vapor mixture. Rate specimens for changes in color, blistering, etc.

This r2247 this practice suitable for flat panels as well as large or 3D objects.

Water Resistance and Humidity (ASTM D 870, ASTM D 2247)

It does not specify specimen preparation, or evaluation of results. The d2427 given in parentheses are for information only. Report any instances of condensation non-uniformity if they occur during the exposure. Reverify the chamber if there are any changes to the setup of the equipment or if any of the components listed in Section 5 are repaired or replaced.

As the warmer saturated air passes the cooler specimens, water is asgm onto the specimens in the form of condensation. Last previous edition approved in as D — 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.

  FRITJOF CAPRA THE TURNING POINT PDF

ASTM D在%相对湿度下涂层的耐水性试验_百度文库

Active view current version of standard Translated Standard: Water permeates the coating at rates that are dependent upon the characteristics of the coating. Link to Active This link will always route to the current Active version of the standard.

It is difficult to produce condensation with small chambers because the temperature differential is too slight. The level of water in the heating jacket should be approximately 30 cm 12 in. Remove only as many adtm as can be rated within the speci? This standard has been approved for use by agencies of the U. Summary of Practice 3.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Arrange specimens so that condensate from one specimen cannot drip on other specimens. The values given in parentheses are for information only. Primary limit control for immersion heater 6 5—Heated water tank for supplying heat and humidity to room 6—Immersion heater 7—Water temperature limit control 8—Constant level water tank unheated with over?

As the warmer saturated air passes the cooler specimens, water is deposited onto the specimens in the form of condensation. Corrosion tests can be conducted, as the condensate dripping off the test articles in not recirculated.

Approved December 1, Polyvinyl chloride pipe and? Users of this practice alone may use the known performance of the controls to set test end points. This practice is therefore useful for evaluating coatings alone or complete coating systems.

Another option is to continue the test until all specimens have failed, and use the time to reach failure as a way to differentiate performance.

As the warmer saturated air passes the cooler specimens, water is deposited onto the specimens in the form of condensation. Specimens used for chamber veri? A coating system is considered to pass if there is no evidence of water-related failure after a period of time.

  CRESTRON C2ENET 1 PDF

Air pressure to the humidifying tower should be approximately 7 to 14 kPa 1 to 2 psi.

Some tests are used for a pass or fail determination at an arbitrary time. This saturates the air in the lower portion of the test aatm with water vapor. A number in parentheses indicates the year of last reapproval. One type uses a water tank with an electric immersion heater, another uses a water vapor generator, and the third type uses a submerged air distribution pipe.

After the specimens have been in an unopened chamber for at least 12 h, open the chamber and check for the presence of uniform condensation on each specimen. Your comments are invited either for revision of this standard or for additional standards and should be addressed to Asfm International Headquarters.

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. The substrate composition and surface preparation, specimen preparation, and the number of specimens should be agreed upon prior to testing. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

Any effects such as color change, blistering, loss of adhesion, softening, or embrittlement are observed and reported. If you feel that your comments have not received a fair hearing you should make your views known to the E2247 Committee on Standards, at the address shown below.