1、Designation:D737610a(Reapproved 2022)Standard Practice forOutdoor Evaluation of Wet Stack Storage Conditions onCoil-Coated Metals1This standard is issued under the fixed designation D7376;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revisi
2、on,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 is used to determine the resistance tocorrosion and blistering of coil-coated metal products r
3、elativeto one another when stacked outdoors under direct weatheringconditions in which they are wetted by rain and dew.1.2 The coil-coated product variables evaluated mayinclude,but are not limited to,substrates,pretreatments,primers,topcoats,and backers.1.3 This test simulates a stacked building pa
4、nel bundlestored at a job site in wet outdoor conditions.The results frompanels tested during the same time period at the same physicallocation may be used to compare products as an indicator ofrelative field performance.Environments with higher tempera-ture and moisture levels accelerate corrosion
5、and blistering.1.4 This standard does not endorse the storage of level(thatis,0 from horizontal)building panels stacks in wet outdoorconditions.Level storage of building panels is not recom-mended and is used in this standard for evaluation only.1.5 The values stated in SI units are to be regarded a
6、s thestandard.The values given in parentheses are for informationonly.1.6 This standard does not purport 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,health,and environmental practices and de
7、ter-mine the applicability of regulatory limitations prior to use.1.7 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-menda
8、tions issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D610 Practice for Evaluating Degree of Rusting on PaintedSteel SurfacesD714 Test Method for Evaluating Degree of Blistering ofPaintsD1654 Test Method for Evaluation of Pain
9、ted or CoatedSpecimens Subjected to Corrosive EnvironmentsG7 Practice for Natural Weathering of Materials3.Summary of Practice3.1 This practice is for the evaluation of relative resistanceto wet stack corrosion and blistering of coil-coated metal.Thetest is to be conducted in an outdoor environment
10、withcoil-coated panels placed on a flat surface while allowingexposure to direct weather conditions including rain,dew,andsolar radiation.3.2 It is necessary to expose negative controls in each testrun,that is,products with known resistance to corrosion andblistering in this location,at the same tim
11、e as the test productto determine its resistance relative to controls.3.3 Panels are evaluated periodically for corrosion andblistering as specified in 6.7.4.Significance and Use4.1 This practice provides for periodic testing for resistanceto wet conditions during storage to compare the relativeperf
12、ormance of specific combinations of coatings,substrates,and/or pretreatments used on coil-coated metal.The resultsmust be considered relative and do not indicate absoluteperformance.4.2 When stored improperly,coil-coated building panelstacks can be exposed to rainwater,which flows into gapsbetween p
13、anels by capillary action or gravity,and remains inthe gaps because of poor drainage conditions.Such a conditionis known as a“wet stack”and may cause blistering and1This practice is under the jurisdiction of ASTM Committee D01 on Paint andRelated Coatings,Materials,and Applications and is the direct
14、 responsibility ofSubcommittee D01.53 on Coil Coated Metal.Current edition approved June 1,2022.Published July 2022.Originally approvedin 2007.Last previous edition approved in 2016 as D7376 10a(2016).DOI:10.1520/D7376-10AR22.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orconta
15、ct ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was
16、developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1corrosion of the painted surfaces.This practice simulates suchimproper storage conditions.4.3 Because the outdoor environment shows year-to-yearseasonal and geographic climate variation,the absolute amountof degradati
