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 entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, 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 2012 SAE International All rights reserved. No part of this publication m
3、ay be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside U
4、SA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AMS3144 AEROSPACE MATERIAL SPECIFICATION AMS3144 Issued 2012-11 Primer, Anodic Electrodeposit
5、ion for Aircraft Applications RATIONALE This is a new document to cover the need for an electrodeposition primer specification. 1. SCOPE 1.1 Form This specification establishes the requirements for a waterborne, corrosion inhibiting, chemical and solvent resistant, anodic electrodeposition epoxy pri
6、mer capable of curing at 200 to 210 F (93 to 99 C). 1.2 Application The primers covered by this specification are typically applied as base primers on military, general aviation, and commercial aircraft aluminum surfaces to protect against corrosion. They are suitable for use in a service temperatur
7、e range from -65 to 250 F (-54 to 121 C). 1.3 Classification The coating materials covered by this specification shall be classified as follows: Type 1 Standard pigments Type 2 Low IR (Infrared) pigments Class C Chromated contains chromium based corrosion inhibitors Class N Chrome-Free contains no c
8、hromium based corrosion inhibitors 1.4 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 involved in such use. I
9、t is the sole responsibility of the user to ensure 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. SAE AMS3144 Page 2 of 17 2. APPLICABLE DOCUMENTS The issue of the following d
10、ocuments 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 docume
11、nt has been specified, the last published issue of that document shall apply. 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. AMS1640 Corrosion Removing Com
12、pound, for Aircraft Surfaces AMS2629 Fluid, Jet Reference AMS2825 Material Safety Data Sheets AMS3277 Sealing Compound, Polythioether Rubber, Fast Curing for Integral Fuel Tanks and General Purpose, Intermittent Use to 360 F (182 C) AMS-QQ-A-250/4 Aluminum Alloy 2024, Plate and Sheet AMS-QQ-A-250/5
13、Aluminum Alloy, Alclad 2024, Plate and Sheet AMS-S-8802 Sealing Compounds, Temperature Resistant, Integral Fuel Tanks and Fuel Cell Cavities, High Adhesion AS1241 Fire Resistant Phosphate Ester Hydraulic Fluid for Aircraft AS5127/1 Aerospace Standard Test Methods for Aerospace Sealants Two Component
14、 Synthetic Rubber Compounds 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM B 117 Operating Salt Spray (Fog) Apparatus ASTM D 329 Standard Specification for Acetone ASTM D 522 Mandr
15、el Bend Test of Attached Organic Coatings ASTM D 740 Standard Specification for Methyl Ethyl Ketone ASTM D 1974 Standard Practice for Methods of Closing, Sealing, and Reinforcing Fiberboard Boxes ASTM D 2247 Water Resistance of Coatings in 100% Relative Humidity ASTM D 2794 Resistance of Organic Coa
16、tings to the Effects of Rapid Deformation (Impact) ASTM D 3359 Measuring Adhesion by Tape Test ASTM D 3363 Film Hardness by Pencil Test SAE AMS3144 Page 3 of 17 ASTM D 3960 Standard Practice for Determining Volatile Organic Compound (VOC) Content of Paints and Related Coatings ASTM D 4399 Measuring
17、Electrical Conductivity of Electrocoat Baths ASTM D 5402 Standard Practice for Assessing the Solvent Resistance of Organic Coatings Using Solvent Rubs ASTM D 7091 Standard Practice for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to Ferrous Metals and Nonmagnetic,
18、 Nonconductive Coatings Applied to Non-Ferrous Metals ASTM G 85 Modified Salt Spray (Fog) Testing 2.3 U.S. Government Publications Available from the Document Automation and Production Service (DAPS), Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, Tel: 215-697-6257, https:/assist.dap
19、s.dla.mil/quicksearch/. 29 CFR 1910.1200 Occupational Safety and Health Hazards (Hazard Communication) FED-STD-141 Paints, Varnish, Lacquer and Related Materials, Methods of Inspection, Sampling and Testing FED-STD-313 Material Safety Data, Transportation Data, and Disposal Data, for Hazardous Mater
20、ials Furnished to Government Activities MIL-A-8625 Anodic Coatings for Aluminum and Aluminum Alloys MIL-DTL-5541 Chemical Conversion Coatings on Aluminum and Aluminum Alloys MIL-PRF-7808 Lubricating Oil, Aircraft Turbine Engine, Synthetic Base MIL-PRF-23377 Primer Coatings: Epoxy, High Solids MIL-PR
21、F-23699 Lubricating Oil, Aircraft Turbine Engine, Synthetic Base, NATO Code Number 0-156 MIL-PRF-81733 Sealing and Coating Compound, Corrosion Inhibitive MIL-PRF-83282 Hydraulic Fluid, Fire Resistant, Synthetic Hydrocarbon Base, Aircraft, Metric, NATO Code Number H-537 MIL-PRF-85285 Coating: Polyure
22、thane, Aircraft and Support Equipment MIL-PRF-85582 Primer Coatings, Epoxy, Waterborne TT-R-2918 Remover, Paint, No Hazardous Air Pollutants (HAPS) 2.4 PRI Publications Available from Performance Review Institute, 161 Thorn Hill Road, Warrendale, PA 15086-7527, Tel: 724-772-1616, www.pri-network.org
23、. PD2000 Procedures for an Industry Qualified Product Management Process PRI QPL-AMS3144 Products Qualified Under AMS3144 SAE AMS3144 Page 4 of 17 2.5 ISO Publications Available from American National Standards Institute, 25 West 43rd Street, New York, NY 10036, Tel: 212-642-4900, www.ansi.org. ANSI
24、 Z400.1 Material Safety Data Sheets ISO/IEC 17025 General Requirements for the Competence of Testing and Calibration Laboratories ISO 11890-1 Determination of Volatile Organic Compound (VOC) Content 3. TECHNICAL REQUIREMENTS 3.1 Materials The primer shall be formulated in accordance with the manufac
25、turers material specification for anodic electrodeposition primer such that it meets the performance requirements set forth in this specification. 3.1.1 Composition 3.1.1.1 Resin feed component The resin feed component shall consist of epoxy or epoxy-urethane resin combined with flow control agents
26、and volatile solvents. 3.1.1.2 Pigment paste component The pigment paste component shall consist of a resin combined with pigments, extenders, and volatile solvents. 3.1.1.3 Characteristics The following characteristics (expressed as tolerance ranges) of the resin feed and pigment paste components s
27、hall be established by the manufacturer at the time of initial process approval. a. Total solids, percent by weight b. Weight per gallon c. pH range (resin dispersion only) d. Viscosity, centipoise-second e. Condition in container SAE AMS3144 Page 5 of 17 3.1.1.4 Mixed primer The following character
28、istics (expressed as tolerance ranges) of the mixed primer shall be established by the manufacturer at the time of initial process approval. a. Total solids, percent by weight b. Pigment/Binder content c. pH range d. Conductivity, micromhos e. Volatile organic compounds (VOC), lbs/gal (gm/L) f. Cure
29、 time and temperature g. Dry film thickness 3.1.2 Prohibited Materials The primer shall contain no lead or cadmium. Class N primer shall additionally contain no chromium compounds. 3.1.3 Toxicity The primer shall have no adverse effect on the health of personnel when used for its intended purpose in
30、 accordance with manufacturers instructions and with appropriate handling procedures and precautions per the material safety data sheet (See 4.8.2). 3.2 Odor The odor of the primer components and the mixed primer shall not be obnoxious nor cause discomfort to personnel during mixing or application.
31、3.3 VOC Content The volatile organic compound (VOC) content of the mixed primer shall be reported in lbs/gal (g/L) on the qualification test report when tested in accordance with ASTM D 3960 (calculate using Paragraph 10.2 and Appendices X2 and X3) and ISO 11890-1 (calculate using Method 3). 3.4 Sto
32、rage Stability The primer components (resin feed and pigment paste), in its original packaged and unopened condition, shall meet all the requirements in this specification for a period of twelve months from date of manufacture when stored in a temperature range of 60 F (15 C) to 90 F (32 C). 3.5 Pro
33、perties The primer, when prepared in accordance with the manufacturers instructions, shall conform to the requirements shown in Table 1, determined in accordance with the specified test methods. SAE AMS3144 Page 6 of 17 TABLE 1 - PROPERTIES Paragraph Property Test Requirement 3.5.1 Quality Visual 3.
34、5.2 Color Visual 3.5.3 Thickness 4.7.5.1 3.5.4 Hardness 4.7.5.2 3.5.5.1 Flexibility Impact Resistance 4.7.5.3.1 3.5.5.2 Flexibility Low Temperature 4.7.5.3.2 3.5.5.3 Flexibility Elongation 4.7.5.3.3 3.5.6.1 Adhesion Wet Tape Test 4.7.5.4.1 3.5.6.2 Adhesion Dry Tape Test 4.7.5.4.2 3.5.7.1 Compatibili
35、ty Topcoats 4.7.5.5.1 3.5.7.2 Compatibility Repair Primer 4.7.5.5.2 3.5.7.3 Compatibility Sealant Adhesion 4.7.5.5.3 3.5.8 Fluid Resistance 4.7.5.6 3.5.9 Humidity Resistance 4.7.5.7 3.5.10 Solvent Resistance 4.7.5.8 3.5.11.1 Corrosion Resistance Neutral Salt Spray 4.7.5.9.1 3.5.11.2 Corrosion Resist
36、ance - Filiform 4.7.5.9.2 3.5.11.3 Corrosion Resistance Sulfur Dioxide Salt Spray 4.7.5.9.3 3.5.12 Infrared Reflectance (Type 2 only) 4.7.5.10 3.5.13 Rain Erosion Resistance 4.7.5.11 3.5.14 Strippability 4.7.5.12 3.5.1 Quality The primer components (resin feed and pigment paste) shall be uniform in
37、quality and condition, free of grit, seeds, lumps, abnormal thickening or livering. The components shall not show pigment flotation nor excessive settling, and shall mix to a smooth, homogeneous, and pourable condition. 3.5.2 Color The mixed primer shall exhibit the colors per Type as follows: 3.5.2
38、.1 Type 1 shall be the natural color of the corrosion inhibiting pigments used in the formulation unless otherwise agreed upon by the purchaser and the primer manufacturer. 3.5.2.2 Type 2 shall be dark green, dark grey or black in color determined by the low infrared pigments used. 3.5.3 Thickness T
39、he dry film thickness of the thermally cured primer (as defined in 4.7.4.2) shall be in the range of 0.7 to 1.2 mil when tested in accordance with 4.7.5.1. The topcoat (when needed) shall be applied to a dry film thickness of 1.7 to 2.3 mils. 3.5.4 Hardness The scratch hardness shall be a minimum pe
40、ncil hardness of F when tested in accordance with 4.7.5.2. 3.5.5 Flexibility 3.5.5.1 Impact Resistance The primer shall exhibit no cracking or loss of adhesion at 50 inch-pounds forward and 40 inch-pounds reverse when tested in accordance with 4.7.5.3.1. SAE AMS3144 Page 7 of 17 3.5.5.2 Low Temperat
41、ure Flexibility The primer shall exhibit no cracking or delamination under visual examination when bent over a mandrel in accordance with 4.7.5.3.2. 3.5.5.3 Elongation The primer shall exhibit an elongation of not less than 10 percent when tested in accordance with 4.7.5.3.3. 3.5.6 Adhesion 3.5.6.1
42、Wet Tape Test The primer must have a rating of no less than 4B when tested in accordance with 4.7.5.4.1. 3.5.6.2 Dry Tape Test The primer must have a rating of no less than 4B when tested in accordance with 4.7.5.4.2. 3.5.7 Compatibility 3.5.7.1 Topcoats The topcoated primer shall pass the adhesion
43、requirements of 3.5.6 when tested in accordance with 4.7.5.5.1, using MIL-PRF-85285, Type I Class H polyurethane topcoat. 3.5.7.2 Repair Primer The repair primer shall pass the adhesion requirements of 3.5.6 when tested in accordance with 4.7.5.5.2, using MIL-PRF-23377, Type I, Class C2 or MIL-PRF-8
44、5582, Type I, Class C2 primer. 3.5.7.3 Sealant Adhesion The sealant shall have an average peel strength of at least 20 lbs per inch of width with no value lower than 15 lbs per inch of width. The separation during peel shall be at least 95 percent cohesive in sealant. Tests shall be in accordance wi
45、th 4.7.5.5.3 using AMS-S-8802 sealant, MIL-PRF-81733 Type II sealant, and AMS3277 sealant. 3.5.8 Fluid Resistance When tested in accordance with 4.7.5.6, the primer shall withstand immersion in the fluids and conditions listed below with a pencil hardness no softer than HB and without any failures s
46、uch as blistering, cracking, or peeling. 1. Hydraulic Fluids, MIL-PRF-83282: 30 days 75 F 5 (24 C 3) 2. Lubricating Oil MIL-PRF-7808 14 days at 75 F 5 (24 C 3) 3. Lubricating Oil MIL-PRF-23699 Grade 3: 14 days at 75 F 5 (24 C 3) 4. Hydraulic Fluid MIL-H-5606: 14 days at 75 F 5 (24 C 3) 5. Fluid, Jet
47、 Reference, AMS 2629 Type I: 14 days at 75 F 5 (24 C 3) 6. Fire resistant phosphate ester hydraulic fluid, SAE AS1241: 14 days at 75 F 5 (24 C 3) SAE AMS3144 Page 8 of 17 3.5.9 Humidity Resistance The primer shall not blister, soften, or peel after exposure for 30 days in a humidity chamber at 95% 5
48、 relative humidity and 120 F 5 (49 C 3) when tested in accordance with 4.7.5.7. 3.5.10 Solvent Resistance (cure) The primer shall withstand 200 passes (100 back and forth rubs) by a cloth rag soaked in ASTM D 740 methyl ethyl ketone (MEK) or ASTM D 329 acetone when tested in accordance with 4.7.5.8.
49、 Rubbing through to bare substrate constitutes failure of the primer. 3.5.11 Corrosion Resistance 3.5.11.1 Neutral Salt Spray The primer, with and without a topcoat, shall exhibit no blistering or loss of adhesion beyond 0.125 inch from scribe line after exposure to a 5 percent salt spray for 3000 hours when tested in accordance with
