ASTM E864-2008 455 Standard Practice for Surface Preparation of Aluminum Alloys to be Adhesively Bonded in Honeycomb Shelter Panels《蜂窝状保护板中要用粘合剂粘结的铝合金板面制备的标准实施规程》.pdf
《ASTM E864-2008 455 Standard Practice for Surface Preparation of Aluminum Alloys to be Adhesively Bonded in Honeycomb Shelter Panels《蜂窝状保护板中要用粘合剂粘结的铝合金板面制备的标准实施规程》.pdf》由会员分享,可在线阅读,更多相关《ASTM E864-2008 455 Standard Practice for Surface Preparation of Aluminum Alloys to be Adhesively Bonded in Honeycomb Shelter Panels《蜂窝状保护板中要用粘合剂粘结的铝合金板面制备的标准实施规程》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: E 864 08Standard Practice forSurface Preparation of Aluminum Alloys to Be AdhesivelyBonded in Honeycomb Shelter Panels1This standard is issued under the fixed designation E 864; the number immediately following the designation indicates the year oforiginal adoption or, in the case of re
2、vision, 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 practice cov
3、ers the preparation of clean uniformsurfaces of aluminum alloys suitable for formation of durableadhesive bonds to nonmetallic honeycomb materials in themanufacture of sandwich panels for tactical shelters.1.2 This standard does not purport to address all of thesafety concerns, if any, associated wi
4、th 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. For a specificwarning statement, see 5.2.1.2. Referenced Documents2.1 ASTM Standards:2D 2674 Methods of Anal
5、ysis of Sulfochromate Etch Solu-tion Used in Surface Preparation of AluminumD 3167 Test Method for Floating Roller Peel Resistance ofAdhesivesE 865 Specification for Structural Film Adhesives for Hon-eycomb Sandwich PanelsE 866 Specification for Corrosion-Inhibiting AdhesivePrimer for Aluminum Alloy
6、s to Be Adhesively Bonded inHoneycomb Shelter Panels2.2 APHA Standard:3APHA Standard Methods for the Examination of Water andWaste Water (15th Edition, 1980), Sections 402, 403, and4083. Significance and Use3.1 Durable adhesive bonds to aluminum alloys can beobtained reliably only through proper sel
7、ection and carefulcontrol of the materials used and the steps in the bondingprocess. The preparation of the aluminum alloys to obtainclean, uniform surfaces with appropriate characteristics is acritical step. This practice describes how such surfaces can beobtained.4. Apparatus4.1 General Processing
8、:4.1.1 All heated tanks shall be equipped with automatictemperature controls and shall have means for agitation toprevent local overheating of the solution. Solutions may beheated by any internal or external means that do not changetheir compositions. Steam shall not be introduced into anysolution.
9、Compressed air introduced into any solution orequipment shall have been filtered to remove oil and moisture.4.1.2 Tanks shall be made from, or lined with, materials thathave no adverse effects on the solutions used or the parts beingtreated. All tanks shall be of sufficient size to allow completeimm
10、ersion of the largest part or assembly to be treated.4.2 Rinse TanksImmersion rinse tanks shall be equippedwith a means for skimming or overflowing or both to removesurface contamination. The tanks shall be equipped with ameans for flushing hollow sections.4.3 RinsesRinses, other than final rinses,
11、shall be main-tained in such a manner to prevent carryover of materials thatwould adversely affect the next solution (for example, using afog water rinse as the aluminum part/assembly is beingwithdrawn from the rinse tank).5. Materials5.1 WaterWater used for makeup of processing solutionsand final r
12、insing shall be deionized water or shall meet therequirement of Table 1.Analyses shall be performed as often asnecessary to assure that the water meets the requirements.Samples for analysis shall be collected at the processing tanks.5.2 Etch Solution:5.2.1 Method I, Sulfo-Chromate Etch (FPL)The chem
13、icalanalysis of the etch solution shall be maintained at approxi-mately 30 parts by mass of water, ten parts by mass of sulfuricacid (sp gr 1.84), and one to four parts by mass of sodiumdichromate. Prior to use, a minimum of 0.06 part by mass of1This practice is under the jurisdiction of ASTM Commit
14、tee 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 Nov. 1, 2008. Published December 2008. Originallyapproved in 1982. Last previous edition approved in 2003 as E
15、864 03.2For 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 the American Public Health Association
16、 (APHA), 800 I Street,NW, Washington, DC 20001-3710, http:/www.apha.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.dissolved 2024 aluminum shall be added. (WarningIt isrecognized that chromates present a hazard to health. Use an
17、ddisposal procedures are governed by Federal and Local EPAand DER limitations.5.2.2 Method II, Sulfo-Ferric Etch (P2)The chemicalanalysis of the etch solution shall be maintained at approxi-mately 27 to 36 % by weight of sulfuric acid (sp gr 1.84) and2.9 to 4.7 oz/gal of ferric iron or 18 to 22 oz/g
18、al of ferricsulfate. This is the equivalent of 2 gal of concentrated sulfuricacid and 12.5 lb of ferric sulfate in every 10 gal of solution.Two gallons of a 50 % ferric sulfate solution may be used inplace of the 12.5 lb of the powdered ferric sulfate.NOTE 1Only virgin ferric sulfate solution shall
19、be used in thisprocess. Impurities in reclaimed ferric sulfate will cause unwantedreactions when the aluminum is treated.5.3 Alkaline Cleaning SolutionNonetch, alkaline cleaningsolution shall be prepared in accordance with the manufactur-ers recommendations, or as indicated in 7.1.2. When thealuminu
20、m being cleaned is immersed in the alkaline cleaner forthe time and at the temperature used for processing, there shallbe no evidence of gas evolution, etching, or metal removal. Thealkaline solution shall not contain silicates.5.4 QualityAssuranceAdhesiveThe adhesive system usedfor the quality assu
21、rance tests of 8.6 shall meet SpecificationE 865. The adhesive shall be changed only when a batch isalmost exhausted so the results of any particular days testingcan be directly compared to the results of previous tests. Whena change is made in the batch or lot of adhesive used, anadditional set of
22、tests shall be made to compare the old batchor lot with the new one to establish a basis for comparisonbetween the results obtained with each.6. Test Methods6.1 Chemical AnalysesPerform chemical analyses of thewater and solutions as indicated in 6.2 and 6.3. Analyze asoften as necessary to maintain
23、the required concentrations at aminimum of every day of operation. If a process is not in useduring the normal analysis period, note this on the analysisrecord and analyze the solution prior to further use.6.2 Water AnalysesAnalyze as described in APHA Stan-dard Methods for the Examination of Water
24、and Waste Water.6.3 Etch Solution Analysis:6.3.1 Sulfo-Chromate EtchPerform the analyses in accor-dance with Methods D 2674.6.3.2 Sulfo-Ferric EtchPerform the analyses in accor-dance with 6.3.2.1 and 6.3.2.2.6.3.2.1 Sulfuric AcidPipet a 1-mL (0.03-oz) sample into a250-mL (8.5-oz) Erlenmeyer flask co
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