1、Designation:E179305 Designation: E1793 11Standard 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, i
2、n 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 T
3、his practice covers the preparation of clean, uniform surfaces of aluminum alloy suitable for formation of durable adhesivebonds in “foam and beam” panels used for the manufacture of tactical rigid wall shelters.1.2 The values stated in SI units are to be regarded as the standard. The values given i
4、n parentheses are for information only.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylim
5、itations prior to use.2. Referenced Documents2.1 ASTM Standards:2E864 Practice for Surface Preparation of Aluminum Alloys to Be Adhesively Bonded in Honeycomb Shelter PanelsE1749 Terminology Relating to Rigid Wall Relocatable SheltersE1794 Specification forAdhesive for Bonding Foam Cored Sandwich Pa
6、nels (200F Elevated Humidity Service), Type II PanelsE1800 Specification for Adhesive for Bonding Foam Cored Sandwich Panels (160F Elevated Humidity Service), Type I Panels3. Terminology3.1 DefinitionsSee Terminology E1749 for definitions of other terms used in this practice.3.2 Definitions of Terms
7、 Specific to This Standard:3.2.1 Type 1 panelspanels used in the construction of foam and beam shelters designed for 71.1C (160F) elevated humidityservice.3.2.2 Type 2 panelspanels used in the construction of foam and beam shelters designed for 93.3C (200F) elevated humidityservice.3.2.3 foam and be
8、am panela sandwich construction consisting of internal rigid foam core placed between structural beams(at specific distance(s) apart) and bonded to face sheets on both sides.4. Significance and Use4.1 Reproducible and durable adhesive bonds to aluminum alloys can be obtained reliably only through pr
9、oper selection andcareful control of the materials used and the steps in the bonding process. The preparation of the aluminum alloys to obtain clean,uniform surfaces with appropriate characteristics is a critical step. This practice describes how such surfaces can be obtained.5. Apparatus5.1 General
10、 ProcessingPractice E864, paragraph 5.14.1, applies.6. Materials6.1 WaterPractice E864, paragraph 5.15.1, applies.6.2 Cleaning Solutions:6.2.1 Type 1 PanelsParts shall be dip cleaned in a solution which is made up in accordance with the manufacturers1This practice is under the jurisdiction of ASTM C
11、ommittee E06 on Performance of Buildings and is the direct responsibility of Subcommittee E06.53 on Materials andProcesses for Durable Rigidwall Relocatable Structures.Current edition approved Oct.Sept. 1, 2005.2011. Published October 2005.2011. Originally approved in 1996. Last previous edition app
12、roved in 20002005 as E1793 005.DOI: 10.1520/E1793-05.10.1520/E1793-11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the AS
13、TM website.1This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consu
14、lt prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.recommendations. The only requiremen
15、t for acceptability being that the conditions of 7.2.1 be met.6.2.2 Type 2 PanelsTreat aluminum using either Method 1 or Method 2 of Practice E864.7. Test Methods7.1 GeneralThe test methods of Practice E864 apply, except as otherwise listed.E1793 1127.2 Exceptions:7.2.1 Surface ResistanceSurface res
16、istance measurements shall be made using a Model 152 Microhm meter and a ModelH-2000 test jig.3Current shall be 10.0 6 0.2 A. The electrode force shall be 267 6 11 kg (600 6 25 lb). The entire apparatus shallbe calibrated per the manufacturers recommendations, and at least once every week inspect th
17、e electrode tips for deterioration andwear.7.2.2 Physical Strength TestThe adequacy for preparing aluminum surfaces for bonding shall be determined by monitoringdaily the results of the adhesive specimen testing performed in Specification E1794 or E1800.7.2.3 VisualAfter being cleaned and immediatel
18、y prior to bonding, parts shall be visually inspected and shall be entirely freeof contaminants, such as grease, oil, water, dirt, dust, loose particles, paint, ink markings, cleaning agent, etc.8. Procedure8.1 Surface Preparation, Type 1 PanelsPerform the steps in the procedure in accordance with 8
19、.1.1 through 8.1.2.8.1.1 CleaningAll parts shall be subjected to a solution dip cleaning process such that their surface resistance after cleaningshall be no more than 100 V.8.1.2 Spot CleaningLocalized contamination shall be removed from parts immediately prior to bonding.8.1.2.1 Dust shavings, loo
20、se particles, etc. shall be removed using a vacuum cleaning device or wiping with a clean dry cloth,or both.8.1.2.2 Other organic contaminates shall be removed by wiping with isopropyl alcohol applied on a clean cloth. Areas no largerthan 0.84 m2(9 ft2) shall be wiped at a time. Care shall be taken
21、to avoid getting the solvent in cavities or between faying surfaces.A clean, dry cloth shall be used to remove the solvent and contaminant. The solvent shall not be allowed to dry on the parts.8.2 Surface Preparation, Type 2 PanelsPerform the cleaning of aluminum panels in accordance with Practice E
22、864, Section7. , Section 7.9. Quality Assurance9.1 Process InspectionConcentration of the cleaning solutions and their temperatures during use shall be in accordance withthe manufacturers recommendations or in accordance with the requirements of Practice E864. Daily titration and temperaturereadings
23、 shall be taken to determine compliance with the requirements.9.2 HandlingParts that have been processed shall be handled with white cotton gloves only. Gloves shall be clean and freeof dirt, silicones, oils, grease, lint, etc.9.3 StorageCleaned parts shall be stored and protected to preclude contam
24、ination with dust, dirt, oils, moisture, etc. Adhesiveshall be applied for bonding within 72 h after parts are cleaned. Parts not bonded within 72 h shall be recleaned.9.4 Marking of Type 2 PanelsImmediately after processing by this specification, parts shall be date stamped. The informationshall be
25、 placed on a piece of masking tape 12.5 mm (12 in.) wide by approximately 75 mm (3 in.) long. The tape shall be appliedto the clean part. The date and piece number shall be stamped on the tape. The inspection stamp shall be applied as a seal, halfon the tape and half on the part surface. The masking
26、 tape shall not be placed on a surface which will subsequently be adhesivelybonded. Any skin or assembly that does not have the date stamp and inspectors stamp applied in this manner shall be recleaned.9.5 Quality Assurance TestFive test strips of 6061-T6 aluminum 23 by 25 by 100 mm (0.090 by 1 by 4
27、 in.) shall be subjectedto the production cleaning process for the purpose of taking surface resistance readings. The strips shall be included with thenormal production cleaning batch. Handling and storage after cleaning shall be the same as employed on the cleaned productionparts.10. Keywords10.1 c
28、lean uniform surface; dip cleaned; durable adhesive bonds; foam and beam panels; tactical shelters; titrationASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised
29、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 committee and must be reviewed every five years andif not revised, either reap
30、proved 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 meeting of theresponsible technical committee, which you may attend. If you
31、 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, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual
32、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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).3Available from J. W. Dice Co., Englewood, NJ, or equivalent.E1793 113
