ASTM_E_1826_-_12.pdf

Designation:E182612Standard Specification forLow Volatile Organic Compound(VOC)Corrosion-InhibitingAdhesive Primer for Aluminum Alloys to Be AdhesivelyBonded1This standard is issued under the fixed designation E1826;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,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.This standard has been approved for use by agencies of the Department of Defense.1.Scope1.1 This specification covers pigmented,sprayable,lowvolatile organic compound(VOC)corrosion-inhibiting adhe-sive primers for use on aluminum alloys that are to beadhesively bonded in the fabrication of panels for tacticalshelters.When applied to a properly prepared surface ofaluminum alloy,the primer imparts corrosion resistance andforms a surface suitable for structural bonding and for coatingwith shelter paint finishes.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses are mathematicalconversions to inch-pound units that are provided for informa-tion only and are not considered standard.1.3 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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2B117 Practice for Operating Salt Spray(Fog)ApparatusB209 Specification for Aluminum and Aluminum-AlloySheet and PlateD1002 Test Method for Apparent Shear Strength of Single-Lap-Joint Adhesively Bonded Metal Specimens by Ten-sion Loading(Metal-to-Metal)D3167 Test Method for Floating Roller Peel Resistance ofAdhesivesE631 Terminology of Building ConstructionsE864 Practice for Surface Preparation of Aluminum Alloysto Be Adhesively Bonded in Honeycomb Shelter PanelsE865 Specification for Structural Film Adhesives for Hon-eycomb Sandwich PanelsE874 Practice for Adhesive Bonding of Aluminum Facingsto Nonmetallic Honeycomb Core for Shelter PanelsE1749 Terminology Relating to Rigid Wall RelocatableShelters2.2 Federal Specifications:3QQ-A-250/8d Aluminum Alloy 5052 H34 Plate and SheetQQ-A-250/11d Aluminum Alloy 6061 T6 Plate and Sheet2.3 Government Document:4Rule 1124 Aerospace Assembly and Component Manufac-turing Operations,South Coast Air Quality ManagementDistrict3.Terminology3.1 DefinitionsSee Terminologies E631 and E1749 fordefinitions of general terms used in this specification.4.Materials and Manufacturer4.1 The primer shall be a pigmented liquid composed of amodified epoxy phenolic or other resin system compounded tobe spray-applied to produce a continuous,uniform coatingwithout dilution.5.Physical Properties5.1 The uncured primer shall be tested as specified in 6.1and meet the requirement of Table 1.5.2 Properties of Cured FilmWhen applied and cured inaccordance with 6.1.8,the cured film shall meet the require-ments of Tables 2 and 3 when tested as specified in 6.2 and 6.3.1This specification is under the jurisdiction of ASTM Committee E06 onPerformance of Buildings and is the direct responsibility of Subcommittee E06.53on Materials and Processes for Durable Rigidwall Relocatable Structures.Current edition approved Nov.1,2012.Published December 2012.Originallyapproved in 1996.Last previous edition approved in 2011 as E1826 11.DOI:10.1520/E1826-2.2For 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.3Available from Standardization Documents Order Desk,DODSSP,Bldg.4,SectionD,700RobbinsAve.,Philadelphia,PA19111-5098,http:/dodssp.daps.dla.mil.4Available from South Coast Air Quality Management District,21865 CopleyDr.Diamond Bar,CA 91765,http:/www.aqmd.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.3 Storage StabilityPrimer stored in accordance with6.1.3 shall meet the requirements for normal-and low-temperature floating roller peel in Table 3 when cured inaccordance with 6.1.8 and tested as specified in 6.3.7 and 6.3.8.5.4 Shelf LifeThe shelf life of the primer at 25 6 7C(776 12F)shall be at least four days.After four days,when testedaccording to 6.1.4,the primer shall meet the requirements fornormal-and low-temperature floating roller peel in Table 3when cured in accordance with 6.1.8 and tested as specified in6.3.7 and 6.3.8.5.5 Film ThicknessThe average,minimum,and maximumfilm thicknesses shall be between 0.0025 and 0.010 mm(0.0001 and 0.0004 in.)615%coefficient of variation.At leastfive thickness readings shall be made with no more than one inany 645 mm2(1 in.2)area.5.6 VOC ContentThe volatile organic compound(VOC)is any volatile