1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.Copyright 2001 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.
3、A.QUESTIONS REGARDING THIS DOCUMENT: (724) 772-7161 FAX: (724) 776-0243TO PLACE A DOCUMENT ORDER: (724) 776-4970 FAX: (724) 776-0790SAE WEB ADDRESS: http:/www.sae.org400 Commonwealth Drive, Warrendale, PA 15096-0001AEROSPACE MATERIAL SPECIFICATIONAMS 3168Issued NOV 2001Aqueous Cleanersfor Cleaning P
4、rior to Application of Sealing Compounds1. SCOPE:1.1 Form: This specification covers liquid aqueous cleaners.1.2 Application: These aqueous cleaners have been used typically for cleaning aircraft primary and secondary structural surfaces prior to application of adhesion promoters and/or sealing mate
5、rials, but usage is not limited to such applications.1.3 Safety - Hazardous Materials: While the materials, methods, applications and processes described or referenced in this specification may involve the use of hazardous materials, this specification does not address the hazards which may be invol
6、ved in such use. It is the sole responsibility of the user to insure familiarity with the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved.2. APPLICABLE DOCUMENTS: The issue of the following document
7、s in effect on the date of the purchase order forms a part of this specification to the extent specified herein. The supplier may work to a subsequent revision of a document unless a specific document issue is specified. When the referenced document has been canceled and no superseding document has
8、been specified, the last published issue of that document shall apply.AMS 3168 SAE AMS 3168- 2 -2.1 SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001 or www.sae.org.AMS 2473 Chemical Treatment for Aluminum Alloys, General Purpose CoatingAMS 2629 Fluid, Jet Refer
9、enceAMS 2825 Material Safety Data SheetsAMS 3276 Sealing Compound, Integral Fuel Tanks and General Purpose, Intermittent Use to 360 F (182 C)AMS 3375 Adhesive/Sealant, Fluorosilicone, Aromatic Fuel Resistant, One-Part, Room Temperature VulcanizingAMS 3819 Cloths, Cleaning, for Aircraft Primary and S
10、econdary Structural SurfacesAMS 4045 Aluminum Alloy Sheet and Plate 5.6Zn 2.5Mg 1.6Cu 0.23Cr 7075: (-T6 Sheet, -T651 Plate) Solution and Precipitation Heat TreatedAMS 4101 Aluminum Alloy Plate, 4.4Cu 1.5Mg 0.60Mn, (2124 - T851) Solution Heat Treated, Stretched, and Precipitation Heat Treated AMS 420
11、2 Aluminum Alloy Plate, 5.7Zn 2.2Mg 1.6Cu 0.22Cr, (7075-T7351) Solution Heat Treated, Stress Relieved by Stretching, and Precipitation Heat Treated AMS 4911 Titanium Alloy, Sheet, Strip, and Plate 6Al - 4V, AnnealedMAM 4911 Titanium Alloy, Sheet, Strip, and Plate 6Al - 4V, AnnealedAMS 5046 Sheet, St
12、rip, and Plate, Carbon Steel (SAE 1020 and 1025) AnnealedAMS 6419 Steel Bars, Forgings, and Tubing, 1.6Si 0.82Cr 1.8Ni 0.40Mo 0.08V (0.40-0.45C), Consumable Electrode Vacuum RemeltedAMS-C-27725 Coating, Corrosion Preventive, for Aircraft Integral Fuel TanksAMS-QQ-A-250/4 Aluminum Alloy, 2024, Plate
13、and SheetAS5127/1 Test Methods for Aerospace Sealants, Two-Component Synthetic Rubber CompoundsPD2000 Procedures For an Industry Qualified Product Management Process2.2 ASTM Publications: Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 or www.astm.org.ASTM D 512 Chloride
14、 Ion in WaterASTM D 1179 Fluoride Ion in WaterASTM D 1193 Reagent WaterASTM D 1475 Density of Paint, Varnish, Lacquer, and Related ProductsASTM D 3278 Flash Point of Liquids by Setaflash-Closed-Cup ApparatusASTM E 70 pH of Aqueous Solutions with the Glass ElectrodeASTM E 1252 General Techniques for
15、Qualitative Infrared AnalysisASTM F 483 Total Immersion Corrosion Test for Aircraft Maintenance ChemicalsASTM F 519 Mechanical Hydrogen Embrittlement Evaluation of Plating Processes and Service EnvironmentsASTM F 1110 Sandwich Corrosion TestASTM G 38 Making and Using C-Ring Stress-Corrosion Test Spe
16、cimensAMS 3168 SAE AMS 3168- 3 -2.3 U. S. Government Publications: Available from DODSSP Subscription Service Desk, Building 4D, 700 Robins Avenue, Philadelphia, PA 19111-5094.A-A-58054 Abrasive Mats, Non-Woven, Non-MetallicA-A-59281 Cleaning Compound Solvent MixturesMIL-PRF-23377 Primer Coatings, E
17、poxy, High SolidsMIL-PRF-85582 Primer Coatings, Epoxy, VOC Compliant, Chemical and Solvent Resistant3. TECHNICAL REQUIREMENTS: 3.1 Material: The cleaning compound shall be an aqueous based liquid, formulated to meet the requirements of this specification. The cleaning compound shall not contain halo
18、genated solvents, ozone depleting chemicals, or excessive hazardous air pollutants as defined and regulated by the United States Environmental Protection Agency or volatile organic compound (VOC) materials as defined or listed by the Clean Air Act.3.1.1 Qualification: All products sold to this speci
19、fication shall be listed, or approved for listing, on the qualified products list, PRI QPL AMS 3168. The qualified products list shall be in accordance with PD2000.3.2 Properties: The cleaning compound shall conform to the requirements of Table 1.AMS 3168 SAE AMS 3168- 4 -3.3 Quality: The cleaning c
20、ompound, as received by purchaser, shall be uniform in quality and condition, and free from foreign materials and other contaminants detrimental to usage of the product4. QUALITY ASSURANCE PROVISIONS: 4.1 Responsibility for Inspection: The manufacturer of the cleaning compound shall supply all sampl
21、es for suppliers tests and shall be responsible for performing all required tests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the product conforms to the requirements of this specification.TABLE 1 - PropertiesParagraph Property Requ
22、irement Test Method3.2.1 Composition, Infrared AnalysisSame as data determined on qualification test sampleSee 4.5.63.2.2 Density 2% of preproduction test value ASTM D 14753.2.3 pH 7 to 12ASTM E 703.2.4 Flash Point 100 F (38 C) minimum ASTM D 32783.2.5 Free Chlorides None ASTM D 512, Method C3.2.6 F
23、ree Fluorides None ASTM D 1179, Method B3.2.7 Visible Dry ResidueNo more residual contamination and/or streaking than the control solvent4.5.73.2.8 Sandwich CorrosionShall not cause a corrosion rating greater than one on any test panelASTM F 11103.2.9 Total Immersion CorrosionWeight change no more t
24、han 0.03 mg/sq cm/24 hours, no pitting, corrosion or heavy stain4.5.83.2.10 Hydrogen EmbrittlementNo rupture of specimens ASTM F 519, Type 1a notched bars3.2.11 Stress Corrosion No corrosion 4.5.93.2.12 Cleaning Efficiency 20 lbf/inch width (3580 N/m), 100% cohesive failure for AMS 3276 sealant8 lbf
25、/inch width (1401 N/m), 100% cohesive failure for AMS3375 sealant4.5.103.2.13 Appearance All components shall be miscible See 4.5.11AMS 3168 SAE AMS 3168- 5 -4.2 Classification of Tests: 4.2.1 Acceptance Tests: Tests for the requirements in Table 2 are acceptance tests and shall be performed on each
26、 lot.4.2.2 Qualification Tests: All technical requirements are qualification tests (see 8.3) and shall be performed prior to or on the initial shipment of cleaning compound to a purchaser, when a change in ingredients and/or processing requires reapproval as in 4.4.2, and when purchaser deems confir
27、matory testing to be required.4.3 Sampling and Testing: 4.3.1 For Acceptance Tests: Sufficient cleaning compound shall be taken at random from each lot to permit performing all required tests. The number of determinations for each requirement shall be as specified in the applicable test procedure or
28、, if not specified therein, not less than three.4.3.1.1 A lot shall be all cleaning compound produced in a single production run from the same batch of raw materials under the same fixed conditions and presented for vendors inspection at one time. A lot of cleaning compound shall not exceed 10,000 g
29、allons (37,850 L).4.3.1.2 When a statistical sampling plan has been agreed upon by purchaser and supplier, sampling shall be in accordance with such plan in lieu of sampling as in 4.3.1 and the report of 4.6 shall state that such plan was used.4.3.2 For Qualification Tests: As agreed upon by purchas
30、er and supplier.4.4 Approval: 4.4.1 Cleaning compound supplied to this specification shall be listed, or approved for listing, on the qualified products list PRI QPL AMS 3168.TABLE 2 - Acceptance TestsRequirement Test MethodComposition 3.2.1Density 3.2.2pH 3.2.3Flash Point 3.2.4Free Chlorides 3.2.5F
31、ree Fluorides 3.2.6Visible Dry Residue 3.2.7Appearance 3.2.13AMS 3168 SAE AMS 3168- 6 -4.4.2 Manufacturer shall use ingredients, manufacturing procedures, processes, and methods of inspection on production cleaning compound which are essentially the same as those used on the approved preproduction s
32、ample. If necessary to make any change in ingredients, in type of equipment for processing, or in manufacturing procedures, manufacturer shall submit for reapproval a statement of the proposed changes in ingredients and/or processing and, when requested, a sample of cleaning compound. Production cle
33、aning compound made by the revised procedure shall not be shipped prior to receipt of reapproval.4.5 Test Methods: 4.5.1 Standard Conditions: Standard laboratory conditions are 77 F 2 (25 C 1) and 50% 5 relative humidity. All test specimens shall be prepared and cured under these conditions. In addi
34、tion, all uncured property tests shall be conducted under these conditions. Other tests may be conducted at 77 F 5 (25 C 3) with no control on humidity.4.5.2 Standard Cure: Except as otherwise specified, all reference in this specification to a standard cure shall be a 14-day period under the standa
35、rd conditions specified in 4.5.1.4.5.3 Control Cleaning Solvent: The control solvent shall be in accordance with A-A-59281 Type 1.4.5.4 Standard Contaminant: Standard contaminant shall be formulated as in Table 3.4.5.5 Test Substrates: Test substrates as required shall be as specified below. Test pa
36、nel sizes shall be nominally 0.040 x 2.75 x 6.00 inches (1.02 x 69.8 x 152 mm). Aluminum alloy panels shall conform to AMS-QQ-A-250/4 temper -T81 or -T3 with chemical film applied in accordance with AMS 2473.TABLE 3 - Standard ContaminantIngredient Parts By WeightGlycerol Monostearate 3.0Glycerol Tr
37、ioleate 9.0Caprylic Acid 3.0Lauryl Alcohol 1.3Cholesterol 1.2Mineral Oil 2.7Petrolatum 3.0Lecithin 0.3Water 70.0Heat and blend and add 0.5% by weight lamp black.Do not heat above 200 F (93 C).AMS 3168 SAE AMS 3168- 7 -4.5.5.1 AMS-C-27725 Coating: Aluminum alloy panels as in 4.5.5 shall be coated wit
38、h AMS-C-27725 corrosion preventive coating, in accordance with manufacturers instructions, to produce a dry film thickness of 0.0008 to 0.0015 inch (20 to 38 m) and cured for not less than 14 days at standard conditions.4.5.5.2 MIL-PRF-23377 Primer: Aluminum alloy panels as in 4.5.5 shall be coated
39、with MIL-PRF-23377 epoxy primer, in accordance with manufacturers instructions, to produce a dry film thickness of 0.0006 to 0.0009 inch (15 to 23 m) and cured for not less than 14 days at standard conditions.4.5.5.3 MIL-PRF-85582 Primer: Aluminum alloy panels as in 4.5.5 shall be coated with MIL-PR
40、F-85582 epoxy primer, in accordance with manufacturers instructions, to produce a dry film thickness of 0.0006 to 0.0009 inch (15 to 23 m) and cured for not less than 14 days at standard conditions.4.5.5.4 Graphite Epoxy: Graphite epoxy panels shall be fabricated using eight plies of AS 4/3501-6 uni
41、directional tape laid (0,45,90,135) symmetrical. Cure shall be as follows:Install peel ply to plate surface of laminate. Nylon peel ply is acceptable. Install peel ply to bag surface of laminate. Apply vacuum (28 inches Hg, minimum) and 85 psig 5 (586 kPa 34) pressure. Heat to 225 F 5 (107 C 3) at 1
42、 to 4 F (0.6 to 2 C) per minute. Hold at 225 F 5 (107 C 3) for 60 minutes 5. Heat to 350 F 10 (177 C 6) at 1 to 4 F (0.6 to 2 C) per minute. Hold at 350 F 10 (177 C 6) for 120 minutes 5. Cool to 150 F 5 (66 C 3) while maintaining vacuum. Remove vacuum and allow to cool to room temperature.4.5.5.5 AM
43、S 3276 Sealant Coating: Aluminum alloy panels as in 4.5.5.1 shall be cleaned by scrubbing and rinsing with the control solvent (4.5.3) using AMS 3819, Grade A cleaning cloths. After cleaning with the control solvent, surfaces shall be wiped dry with clean AMS 3819, Grade A cleaning cloth and allowed
44、 to dry for a minimum of 30 minutes at standard conditions. The panel shall then be coated with AMS 3276 manganese dioxide curing sealant to an approximate thickness of 0.125 inch (3.18 mm) and cured for not less than 14 days at standard conditions.4.5.5.6 AMS 3375 Fluorosilicone Sealant Coating: Al
45、uminum alloy panels as in 4.5.5.1 shall be cleaned by scrubbing and rinsing with the control solvent (4.5.3) using AMS 3819, Grade A cleaning cloths. After cleaning with the control solvent, surfaces shall be wiped dry with clean AMS 3819, Grade A cleaning cloth and allowed to dry for a minimum of 3
46、0 minutes at standard conditions. The panel shall be primed with a AMS 3375 primer and then be coated with AMS 3375 fluorosilicone sealant to an approximate thickness of 0.125 inch (3.18 mm) and cured for not less than 14 days at standard conditions.4.5.6 Composition: An infrared spectrophotometric
47、graph of the cleaning compound shall be prepared using methods described in ASTM E 1252. The detailed method of sample preparation and preparation of the spectra shall be provided with each graph.AMS 3168 SAE AMS 3168- 8 -4.5.7 Visible Dry Residue: Clean two AMS-QQ-A-250/4 -T81 or -T3 aluminum alloy
48、 panels with the control solvent (4.5.3) using AMS 3819, Grade A cloth. Apply 5 mL of the solvent cleaner under test to a pad 2 x 2 inches (51 x 51 mm) made with eight layers of AMS 3819, Grade A cloth. Immediately clean one of the precleaned panels using gentle finger pressure and vigorous wiping s
49、peed for 15 seconds. Clean the second precleaned panel, using a new pad, and the control solvent (4.5.3). Examine both panels visually for residual contamination and/or streaking.4.5.8 Total Immersion Corrosion: Total immersion corrosion tests shall be conducted according to ASTM F 483 on AMS-QQ-A-250/4 temper -T81 aluminum alloy, AMS 4045 aluminum alloy, AMS 4911 or MAM 4911 titanium alloy, and AMS 5046 steel.4.5.9 Stress Corrosion: C-Ring stress corrosion test shall be conducted as specified in ASTM G 38 using AMS 4101
