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 theref
2、rom, 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 2011 SAE International All rights reserved. No part of this publication ma
3、y 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 US
4、A) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AMS3175AAEROSPACEMATERIALSPECIFICATIONAMS3175 REV. A Issued 2008-06 Revised 2011-04 Superseding
5、 AMS3175 Non-Chromated Surface Pretreatment Prior to Painting RATIONALEThis revision intended to correct editorial and formatting errors from initial specification, and to clarify the paragraph numbering system. 1. SCOPE 1.1 Form This specification establishes the performance requirements for non-ch
6、romated materials used for surface preparation of metallic surfaces prior to applying organic coatings.1.2 Application Pretreatment materials qualified to this specification may be used on metallic surfaces that are subsequently painted. These include, but are not limited to, external and internal a
7、ircraft surfaces, off-aircraft part surfaces, and aircraft surfacesundergoing touch-up/repairs.1.3 Classification Pretreatment materials shall be qualified by Type, Class and Grade as defined below. The pretreatment material is to be tested and evaluated in conjunction with either MIL-PRF-23377 or M
8、IL-PRF-85582 industry qualified primers.Type 1: Suitable for spray application Type 2: Suitable for immersion application Type 3:* Suitable for manual or hand application (i.e., brush, wipe, or other touch up methods) *NOTE: If Product is already qualified to a Type 1 or Type 2 and there is no formu
9、la change for the Type 3, limited testing per Table 4 is permitted. Class C: Qualified for use with primers that contain hexavalent chromium Class N: Qualified for use with primers that are free from: barium, hexavalent chromium, cadmium, arsenic, copper, nickel, mercury, or lead Grade I: 0 to 250 g
10、/L (0 to 2.1 lb/gal) Volatile Organic Content (VOC) Grade II: 251 to 780 g/L (2.11 to 6.55 lb/gal) Volatile Organic Content (VOC) SAE AMS3175A Page 2 of 161.4 Safety-Hazardous Materials While the materials, methods, applications, and processes described or referenced in this specification may involv
11、e the use of hazardous materials, this specification does not address the hazards which may be involved in such use. It 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 heal
12、th and safety of all personnel involved. 2. APPLICABLE DOCUMENTS The issue of the following documents 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
13、 issue is specified. When the referenced document has been cancelled and no superseding document has been specified, the last published issue shall apply. 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canad
14、a) or 724-776-4970 (outside USA), www.sae.org.AMS2825 Material Safety Data Sheets AMS4035 Aluminum Alloy, Sheet and Plate, 4.4Cu - 1.5Mg - 0.60Mn (2024-0), Annealed AMS4037 Aluminum Alloy, Sheet and Plate, 4.4Cu - 1.5Mg - 0.60Mn (2024; -T3 Flat Sheet, -T351 Plate), Solution Heat Treated AMS4041 Alum
15、inum Alloy, Alclad Sheet and Plate, 4.4Cu - 1.5Mg - 0.60Mn, Alclad 2024 and 1-1/2% Alclad 2024, -T3 Flat Sheet; 1-1/2% Alclad 2024-T351 Plate AMS4045 Aluminum Alloy Sheet and Plate, 5.6Zn - 2.5Mg - 1.6Cu - 0.23Cr, 7075: (-T6 Sheet, -T651 Plate), Solution and Precipitation Heat Treated AMS4049 Alumin
16、um Alloy, Sheet and Plate, Alclad, 5.6Zn - 2.5Mg - 1.6Cu - 0.23Cr (Alclad 7075; -T6 Sheet -T651 Plate), Solution and Precipitation Heat Treated AMS4911 Titanium Alloy, Sheet, Strip, and Plate, 6Al - 4V, Annealed AS5505 Requirements for Accreditation of Testing Laboratories for Organic Coatings AS910
17、0 Quality Management Systems - Aerospace Requirements ARP1917 Clarification of Terms used in Aerospace Metals Specifications 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 Sta
18、ndard Practice for Operating Salt Spray Apparatus ASTM D 522 Standard Test Methods for Mandrel Bend Test of Attached Organic Coatings ASTM D 740 Standard Specification for Methyl Ethyl Ketone ASTM D 1200 Standard Test Method for Viscosity by Ford Viscosity Cup SAE AMS3175A Page 3 of 16ASTM D 1849 St
19、andard Test Method for Package Stability of Paint ASTM D 1974 Standard Practice for Methods of Closing, Sealing and Reinforcing Fiberboard Boxes ASTM D 3335 Standard Test Method for Low Concentrations of Lead, Cadmium, and Cobalt in Paint by Atomic Absorption Spectroscopy ASTM D 3359 Standard Test M
20、ethod for Measuring Adhesion by Tape Test ASTM D 3960 Standard Practice for Determining Volatile Organic Compound (VOC) Content of Paints and Related Coatings ASTM D 6905 Standard Test Method for Impact Flexibility of Organic Coatings 2.3 U.S. Government Publications Available from the Document Auto
21、mation and Production Service (DAPS), Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, Tel: 215-697-6257, http:/assist.daps.dla.mil/quicksearch/.FED-STD-141D Federal Test Method Standards FED-STD-595/17925 Miscellaneous, Gloss (para 4.5.1 e) 29 CFR 1910-1200 Occupational Safety Epoxy,
22、Waterborne MIL-C-8507 Coating, Wash Primer (Pretreatment) for Metals, Applications of (for Aeronautical Use) MIL-C-8514 (ASG) Coating Compound, Metal Pretreatment, Resin-Acid 2.4 ISO Publications Available from American National Standards Institute, 25 West 43rd Street, New York, NY 10036-8002, Tel:
23、 212-642-4900, www.ansi.org and International Organization for Standardization, 1, rue de Varemb, Case postale 56, CH-1211 Genve 20, Switzerland, Tel: +41-22-749-01-11, www.iso.org.ISO 1513 1992 Paints and Varnishes - Examination and preparation of samples for testing ISO 17025 General Requirements
24、for the Competence of Testing and Calibration Laboratories 2.5 PRI Publications Available from Performance Review Institute, 161 Thorn Hill Road, Warrendale, PA 15086-7527, Tel: 724-772-1616, www.pri-network.org.PD 2000 Procedures for an Industry Qualified Product Management Process PRI-QPL-AMS3175
25、Products Qualified under AMS3175 SAE AMS3175A Page 4 of 163. TECHNICAL REQUIREMENTS 3.1 Materials Composition of the products is not specified, except for the following: 3.1.1 Composition When tested in accordance with ASTM D 3335, or equivalent, no component of the pretreatment material shall conta
26、in arsenic, cadmium, chromium, copper, nickel, lead or mercury metals or compounds in excess of 0.05% by weight. 3.1.2 Toxicity Manufacturers of components shall use best efforts to ensure that any materials supplied under this specification, when used for their intended purpose in accordance with t
27、he precautions as identified on instruction sheets, shipping containers and on the MSDS, shall have no adverse effect on health of personnel. An MSDS which meets the requirements of 29 CFR 1910.1200 shall be prepared and submitted in accordance with AMS2825. 3.2 Shelf Life Shelf life shall be a mini
28、mum of 12 months from the date of packaging when stored in the original unopened containers at a temperature between 40 F (4.4 C) and 95 F (35 C). Manufacturers repackaged material (i.e., touch-up and repair kits) must be labeled with original date of package where shelf life of original date of pac
29、kage is retained. 3.3 Pretreatment Material Property Requirements Pretreatment material and physical requirements are summarized in Table 1, with additional information in following paragraph.SAE AMS3175A Page 5 of 16TABLE 1 - PHYSICAL REQUIREMENTS Property Requirement Conditioning Test Method Quali
30、ty 3.3.1 As received in original container ISO 1513 Storage Stability 3.3.2 As received inoriginal container Accelerated Storage Stability 3.3.3 As received in original container 4.8.1Admixed Product Properties3.3.4 - - VOC content 3.3.4.1 (per Grade in 1.3) Mixed, preparedfor application 4.8.2Visco
31、sity 3.3.4.2 Mixed, prepared for application Pot Life * 3.3.4.3 Mixed, prepared for application 4.8.3Drying Time 3.3.4.4 Applied on test panels4.8.4Adhesion 3.3.5 - - Wet Tape 3.3.5.1 - No delamination or peel and a rating of 4A. 4.8.5 Cross-Hatch 3.3.5.2 - No delamination or peel and a rating of 4B
32、. 4.8.6 Aged Cross-Hatch 3.3.5.3 - No delamination or peel and a rating of 4B. 4.8.7 Flexibility 3.3.6 - No flexibility loss caused by the surface treatment 4.8.8 Corrosion Resistance 3.3.7 - - Neutral Salt Spray 3.3.7.1 - Class C and Class N; No blisters or undercutting from the scribe. Class C: no
33、 discoloration in the scribe and no pitting in the scribe Class N: discoloration and some corrosion products allowed in the scribe but no pitting Class C: 2000 hours Class N: 2000 hours 4.8.9.1Filiform Corrosion 3.3.7.2 - The top coated primer coatings shall not exhibit filiform corrosion extending
34、beyond 1/4 inch from the scribe, and the majority of the filaments shall be less than 1/8 inch in length Expose to HCI, 1000 hours 102 F and 80% RH 4.8.9.2* NOTE: Mixing and Pot Life references are only applicable to multi-component systems and powders. SAE AMS3175A Page 6 of 163.3.1 Quality Pretrea
35、tment components taken from original or laboratory containers as received shall be free from extraneous matter and show no skinning, gelling, hard settlement or other objectionable properties which will prevent satisfactory application to produce a defect free film. Clear Components: Clear system co
36、mponents shall be homogenous and either clear, or translucent.Pretreatment Powders: Pretreatment components supplied in powder form shall be free flowing and free of any agglomerates that cannot be readily broken up and dissolved under normal agitation in preparation for use. Pretreatment powders sh
37、all be readily soluble when mixed according to the manufacturers instructions. 3.3.2 Storage Stability (Not Applicable for Repackaged Material) After storing for the required shelf life (3.2), and after mixing and waiting the 8 hour pot life as in 3.3.4.3, the requirements of 3.3.4.1, 3.3.4.2, 3.3.4
38、.3, 3.3.4.4, 3.3.5.1, 3.3.5.2 and 3.3.6 shall be met. Data shall be submitted within one year of initial QPL approval in order to maintain qualification status. 3.3.3 Accelerated Storage Stability (Not Applicable for Repackaged Material) NOTE: Mixing and Pot Life references are only applicable to mu
39、lti-component systems and powder. After storing in accordance with 4.8.1, and after mixing and waiting the 8 hour pot life as in 3.3.4.3, the requirements of 3.3.4.1, 3.3.4.2, 3.3.4.3, 3.3.4.4, 3.3.5.1, 3.3.5.2 and 3.3.6 shall be met. Passing of the accelerated storage stability requirements along w
40、ith the balance of the testing (except 3.3.2) shall be acceptable for initial QPL approval.3.3.4 Admixed Product Properties 3.3.4.1 Volatile Organic Compound (VOC) Content The VOC content of the pretreatment shall be according to Grade per 1.3 when tested in accordance with 4.8.2 and ASTM D 3960, or
41、 as certified by the suppliers MSDS when performed in accordance with 4.8.2. 3.3.4.2 Viscosity The viscosity/consistency of pretreatment materials under Type 1 shall be suitable for application to surfaces by spraying. Type 2 shall be suitable for immersion and Type 3 for manual or hand application
42、as described by the manufacturer. 3.3.4.3 Pot-life NOTE: Mixing and Pot Life references are only applicable to multi-component systems and powders. After mixing per manufacturers instructions, the pretreatment material shall have a minimum pot-life of 8 hours when stored at standard conditions as no
43、ted in 4.6.1 in a closed container. At 8 hours the material shall meet the performance and application requirements of this specification. 3.3.4.4 Drying Time Pretreatment shall be ready to prime within 4 hours after application at standard conditions. When tested in accordance to 4.8.4 and 4.8.6, t
44、he adhesion of the panels primed 4 hours after pretreatment application shall be no less than a rating of 4B. SAE AMS3175A Page 7 of 163.3.5 Adhesion 3.3.5.1 Wet Tape The pretreatment and primer shall have no less than a 4A rating and no component of the coating system shall peel or delaminate from
45、the substrate or any other component of the system when tested in accordance with 4.8.5 and ASTM D 3359 Method A. 3.3.5.2 Cross-Hatch The pretreatment and primer shall have no less than a 4B rating when tested in accordance with 4.8.6 and ASTM D 3359 Method B. 3.3.5.3 Aged Cross Hatch After 2000 hou
46、rs of neutral salt spray, pretreatment and primer coated test panels (ASTM B 117) shall have no less than a 4B rating and no component shall peel or delaminate from the substrate or any other component of the system when tested in accordance with 4.8.7. 3.3.6 Flexibility The pretreatment process sha
47、ll not adversely affect the flexibility of the applied primer. A Gardco GE Universal Impact Tester, Model #172 should be used as specified in 4.8.8, and tested in accordance with ASTM D 6905. 3.3.7 Corrosion Resistance 3.3.7.1 Neutral Salt Spray Corrosion Resistance The pretreatment and primer coate
48、d test panels shall exhibit no discoloration in the scribe, no blisters or undercutting from the scribe and no substrate pitting in the scribe when tested in accordance with 4.8.9.1 and ASTM B 117. Discoloration and some corrosion products in the scribe are acceptable for Class N materials. 3.3.7.2
49、Filiform Corrosion Resistance The panels using the pretreatment to Class C of this specification shall use MIL-PRF-23377 (Class C1 or C2) or MIL-PRF-85582 (Class C1 or C2) primer and MIL-PRF-85285 topcoat when preparing panels for the filiform corrosion test. Panels using the pretreatment to Class N of this specification shall use MIL-PRF-23377 (Class N) or MIL-PRF-85582 (Class N) primer and MIL-PRF-85285 topcoat wh
