1、Designation:E179311Standard Practice forPreparation of Aluminum Alloy for Bonding in Foam andBeam Type Transportable Shelters1This standard is issued under the fixed designation E1793;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,t
2、he 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 practice covers the prepar
3、ation of clean,uniformsurfaces of aluminum alloy suitable for formation of durableadhesive bonds in“foam and beam”panels used for themanufacture of tactical rigid wall shelters.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly
4、.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 Docu
5、ments2.1 ASTM Standards:2E864 Practice for Surface Preparation of Aluminum Alloysto Be Adhesively Bonded in Honeycomb Shelter PanelsE1749 Terminology Relating to Rigid Wall RelocatableSheltersE1794 Specification for Adhesive for Bonding Foam CoredSandwich Panels(200F Elevated Humidity Service),Type
6、II PanelsE1800 Specification for Adhesive for Bonding Foam CoredSandwich Panels(160F Elevated Humidity Service),Type I Panels3.Terminology3.1 DefinitionsSee Terminology E1749 for definitions ofother terms used in this practice.3.2 Definitions of Terms Specific to This Standard:3.2.1 Type 1 panelspan
7、els used in the construction offoam and beam shelters designed for 71.1C(160F)elevatedhumidity service.3.2.2 Type 2 panelspanels used in the construction offoam and beam shelters designed for 93.3C(200F)elevatedhumidity service.3.2.3 foam and beam panela sandwich construction con-sisting of internal
8、 rigid foam core placed between structuralbeams(at specific distance(s)apart)and bonded to face sheetson both sides.4.Significance and Use4.1 Reproducible and durable adhesive bonds to aluminumalloys can be obtained reliably only through proper selectionand careful control of the materials used and
9、the steps in thebonding process.The preparation of the aluminum alloys toobtain clean,uniform surfaces with appropriate characteristicsis a critical step.This practice describes how such surfaces canbe obtained.5.Apparatus5.1 General ProcessingPractice E864,paragraph 4.1,ap-plies.6.Materials6.1 Wate
10、rPractice E864,paragraph 5.1,applies.6.2 Cleaning Solutions:6.2.1 Type 1 PanelsParts shall be dip cleaned in a solutionwhich is made up in accordance with the manufacturersrecommendations.The only requirement for acceptability be-ing that the conditions of 7.2.1 be met.6.2.2 Type 2 PanelsTreat alumi
11、num using either Method 1or Method 2 of Practice E864.7.Test Methods7.1 GeneralThe test methods of Practice E864 apply,except as otherwise listed.7.2 Exceptions:7.2.1 Surface ResistanceSurface resistance measurementsshall be made using a Model 152 Microhm meter and a Model1This practice is under the
12、 jurisdiction of ASTM Committee E06 on Perfor-mance of Buildings and is the direct responsibility of Subcommittee E06.53 onMaterials and Processes for Durable Rigidwall Relocatable Structures.Current edition approved Sept.1,2011.Published October 2011.Originallyapproved in 1996.Last previous edition
13、 approved in 2005 as E1793 05.DOI:10.1520/E1793-11.2For 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.Copyright ASTM
14、International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 H-2000 test jig.3Current shall be 10.0 6 0.2 A.The electrodeforce shall be 267 6 11 kg(600 6 25 lb).The entire apparatusshall be calibrated per the manufacturers recommendations,and at least once every wee
15、k inspect the electrode tips fordeterioration and wear.7.2.2 Physical Strength TestThe adequacy for preparingaluminum surfaces for bonding shall be determined by moni-toring daily the results of the adhesive specimen testingperformed in Specification E1794 or E1800.7.2.3 VisualAfter being cleaned an
16、d immediately prior tobonding,parts shall be visually inspected and shall be entirelyfree of contaminants,such as grease,oil,water,dirt,dust,looseparticles,paint,ink markings,cleaning agent,etc.8.Procedure8.1 Surface Preparation,Type 1 PanelsPerform the stepsin the procedure in accordance with 8.1.1 through 8.1.2.8.1.1 CleaningAll parts shall be subjected to a solutiondip cleaning process such that their surface resistance aftercleaning shall be no more than 100.8.1.2 Spot CleaningLocalized cont