1、Designation: E 1793 05Standard Practice forPreparation of Aluminum Alloy for Bonding in Foam andBeam Type Transportable Shelters1This standard is issued under the fixed designation E 1793; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revi
2、sion, 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.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This practice cove
3、rs the preparation of clean, uniformsurfaces of aluminum alloy suitable for formation of durableadhesive bonds in “foam and beam” panels used for themanufacture of tactical shelters.1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informati
4、ononly.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. Refer
5、enced Documents2.1 ASTM Standards:2E 864 Practice for Surface Preparation of Aluminum Alloysto Be Adhesively Bonded in Honeycomb Shelter PanelsE 1749 Terminology of Rigid Wall Relocatable SheltersE 1794 Specification forAdhesive for Bonding Foam CoredSandwich Panels (200F Elevated Humidity Service),
6、 TypeII PanelsE 1800 Specification forAdhesive for Bonding Foam CoredSandwich Panels (160F Elevated Humidity Service), TypeI Panels3. Terminology3.1 DefinitionsSee Terminology E 1749 for definitions ofother terms used in this practice.3.2 Definitions of Terms Specific to This Standard:3.2.1 Type 1 p
7、anelspanels 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
8、 of internal 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 mat
9、erials used and 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 E 864, paragraph 5.1 ap-pli
10、es.6. Materials6.1 WaterPractice E 864, 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.
11、2 Type 2 PanelsTreat aluminum using either Method1 or Method 2 of Practice E 864.7. Test Methods7.1 GeneralThe test methods of Practice E 864 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 Mod
12、elH-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 apparatus1This practice is under the jurisdiction of ASTM Committee E06 on Perfor-mance of Buildings and is the direct responsibility of Subcommittee E06.53 onMaterials and Processes f
13、or Durable Rigidwall Relocatable Structures.Current edition approved Oct. 1, 2005. Published October 2005. Originallyapproved in 1996. Last previous edition approved in 2000 as E 1793 00.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at servicea
14、stm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from J. W. Dice Co., Englewood, NJ, or equivalent.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United State
15、s.shall be calibrated per the manufacturers recommendations,and at least once every week 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 speci
16、men testingperformed in Specification E 1794 or E 1800.7.2.3 VisualAfter being cleaned and 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. Pro
17、cedure8.1 Surface Preparation, Type 1 Panels Perform 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 V.8.1.2 Spot CleaningLocalized
18、 contamination shall be re-moved from parts immediately prior to bonding.8.1.2.1 Dust shavings, loose particles, etc. shall be removedusing a vacuum cleaning device or wiping with a clean drycloth, or both.8.1.2.2 Other organic contaminates shall be removed bywiping with isopropyl alcohol applied on
19、 a clean cloth. Areasno larger than 0.84 m2(9 ft2) shall be wiped at a time. Care shallbe taken to avoid getting the solvent in cavities or betweenfaying surfaces. A clean, dry cloth shall be used to remove thesolvent and contaminant. The solvent shall not be allowed todry on the parts.8.2 Surface P
20、reparation, Type 2 Panels Perform thecleaning of aluminum panels in accordance with PracticeE 864, Section 7.9. Quality Assurance9.1 Process InspectionConcentration of the cleaning so-lutions and their temperatures during use shall be in accordancewith the manufacturers recommendations or in accorda
21、ncewith the requirements of Practice E 864. Daily titration andtemperature readings shall be taken to determine compliancewith the requirements.9.2 HandlingParts that have been processed shall behandled with white cotton gloves only. Gloves shall be cleanand free of dirt, silicones, oils, grease, li
22、nt, etc.9.3 StorageCleaned parts shall be stored and protected topreclude contamination with dust, dirt, oils, moisture, etc.Adhesive shall be applied for bonding within 72 h after partsare cleaned. Parts not bonded within 72 h shall be recleaned.9.4 Marking of Type 2 PanelsImmediately after process
23、-ing by this specification, parts shall be date stamped. Theinformation shall be placed on a piece of masking tape 12.5mm (12 in.) wide by approximately 75 mm (3 in.) long. Thetape shall be applied to the clean part. The date and piecenumber shall be stamped on the tape. The inspection stampshall be
24、 applied as a seal, half on the tape and half on the partsurface. The masking tape shall not be placed on a surfacewhich will subsequently be adhesively bonded. Any skin orassembly that does not have the date stamp and inspectorsstamp applied in this manner shall be recleaned.9.5 Quality Assurance T
25、estFive test strips of 6061-T6aluminum 23 by 25 by 100 mm (0.090 by 1 by 4 in.) shall besubjected to the production cleaning process for the purpose oftaking surface resistance readings. The strips shall be includedwith the normal production cleaning batch. Handling andstorage after cleaning shall b
26、e the same as employed on thecleaned production parts.10. Keywords10.1 clean uniform surface; dip cleaned; durable adhesivebonds; foam and beam panels; tactical shelters; titrationASTM International takes no position respecting the validity of any patent rights asserted in connection with any item m
27、entionedin this standard. Users of this standard are expressly advised 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 committ
28、ee 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 should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meet
29、ing of theresponsible technical committee, which you may attend. 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, P
30、O 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).E1793052
