1、Designation: D 6665 09Standard Practice forEvaluation of Aging Resistance of Pre-stressed PrepaintedMetal in a Boiling Water Test1This standard is issued under the fixed designation D 6665; the number immediately following the designation indicates the year oforiginal adoption or, in the case of rev
2、ision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice can be used to evaluate the resistance of apre-stressed prepainted metal panel to cra
3、cking and loss ofadhesion, or both, after accelerated aging by boiling water.Most coil coated products are formed and bent into specificshapes to produce a final product. These operations introducestresses, which may be relieved by cracking of the coating afteraging.1.2 This standard does not purpor
4、t to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 279
5、4 Test Method for Resistance of Organic Coatings tothe Effects of Rapid Deformation (Impact)D 4145 Test Method for Coating Flexibility of PrepaintedSheetE 643 Test Method for Ball Punch Deformation of MetallicSheet Material3. Apparatus3.1 Boiling water bath big enough to hold formed testspecimens.3.
6、2 103 magnifier (optional).3.3 Scotch #610 adhesive tape or equivalent.4. Reagents4.1 Deionized or other water, as agreed upon by customerand vendor.5. Test Specimen5.1 Bumped, bent, drawn or otherwise deformed samples, tobe agreed upon between customer and vendor. These should beprepared according
7、to Test Methods D 2794, D 4145, E 643,and/or prepared in a manner agreed upon by customer andvendor.6. Procedure6.1 Examine the test specimens for cracking, flowering andtape pick-off (adhesion loss), and record the results.6.2 Place the formed test specimens in the boiling waterbath for one (1) min
8、. Different times may be used if agreedupon by customer and vendor.6.3 Remove the test specimens and allow them to air dryand cool to room temperature.6.4 Inspect the test specimens for cracking, flowering andadhesion loss, then repeat the tape adhesion test.7. Report7.1 Report the observations rega
9、rding cracking, floweringand adhesion loss.7.2 The degree of cracking, flowering and tape pick-offallowed should be agreed upon by customer and vendor.Report cracking, flowering and tape pick-off noted beforeboiling water aging, and cracking and tape pick-off noted afterboiling water aging. When kno
10、wn, report substrate, pretreat-ment, coating system, production or preparation date and anyother information request agreed upon between vendor andcustomer.8. Keywords8.1 aging; bend; boiling water; coil; cracking; deformation;drawn metal; fabrication; flexibility; flowering; impact; pick-off; prepa
11、int; stresses; tape-off1This practice is under the jurisdiction of ASTM Committee D01 on Paint andRelated Coatings, Materials, and Applications and is the direct responsibility ofSubcommittee D01.53 on Coil Coated Metal.Current edition approved June 1, 2009 Published July 2009. Originally approvedin
12、 2001. Last previous edition approved in 2001 as D 6665 - 01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.
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14、vised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, eithe
15、r reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend.
16、If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D6665092
