1、Designation: D 6665 01Standard 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 (e) 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 cr
3、acking 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 purpo
4、rt 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:D 279
5、4 Standard Test Method for Resistance of OrganicCoatings to the Effects of Rapid Deformation (Impact)2D 4145 Standard Test Method for Coating Flexibility ofPrepainted Sheet3E 643 Standard Test Method for Ball Punch Deformation ofMetallic Sheet Material43. Apparatus3.1 Boiling water bath big enough t
6、o hold formed testspecimens.3.2 103 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 vender. Thes
7、e should beprepared according to Test Methods D 2794, D 4145, andE 643, unless such methods do not existat which time thedeformed samples should be prepared in a manner agreed uponby customer and vendor.6. Procedure6.1 Examine the test specimens for cracking and tapepick-off (adhesion loss), and rec
8、ord the results.6.2 Place the formed test specimens in the boiling waterbath for one (1) min. 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 and adhesionl
9、oss, or both, then repeat the tape adhesion test.7. Report7.1 Report the observations regarding cracking and adhe-sion loss, or both.7.2 The degree of cracking and tape pick-off allowed shouldbe agreed upon by customer and vendor. Report substrate,coating system, production or preparation date, crac
10、king andtape pick-off noted before boiling water aging, and crackingand tape pick-off noted after boiling water aging.8. Keywords8.1 aging; bend; boiling water; coil; cracking; deformation;drawn metal; fabrication; flexibility; impact; pick-off; prepaint;stressesThe American Society for Testing and
11、Materials takes no position respecting the validity of any patent rights asserted in connectionwith any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any suchpatent rights, and the risk of infringement of such rights, are entirely
12、 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, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand sho
13、uld be addressed to ASTM Headquarters. Your comments will receive careful consideration at a meeting of the responsibletechnical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make yourviews known to the ASTM Committee on Standards, at the
14、 address shown below.1This 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 Aug. 10, 2001. Published October 2001.2Annual Book of AST
15、M Standards, Vol 06.01.3Annual Book of ASTM Standards, Vol 06.02.4Annual Book of ASTM Standards, Vol 03.01.1Copyright ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.This standard is copyrighted by ASTM, 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 above address or at610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website (www.astm.org).D 66652
