1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and enginee ring sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefr
2、om, 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 invit es your written comments and suggestions.Copyright 1997 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.
3、S.A.QUESTIONS REGARDING THIS DOCUMENT: (412) 772-7154 FAX: (412) 776-0243TO PLACE A DOCUMENT ORDER: (412) 776-4970 FAX: (412) 776-0790400 Commonwealth Drive, Warrendale, PA 15096-0001AEROS PACE STANDARDSubmitted for recognition as an American National StandardAS5255Issued 1997-06E xfoliation T estin
4、g of A luminum1. SCOPE: To provide the aerospace industry with guidance standards for aluminum alloy samples which have been exposed to corrosion conditions which promote exfoliation so as to evaluate susceptibility of products to exfoliation corrosion.2. APPLICABLE DOCUMENTS: The following publicat
5、ions form a part of this document to the extent specified herein. The latest issue of SAE publications shall apply. The applicable issue of other publications shall be the issue in effect on the date of the purchase order. In the event of conflict between the text of this document and references cit
6、ed herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.2.1 ASTM Publications: Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.ASTM G 34 Exfoliation
7、 Corrosion Susceptibility in 2XXX and 7XXX Series Aluminum Alloys (EXCO Test)3. TECHNICAL REQUIREMENTS: 3.1 Test Procedure: Shall be in accordance with ASTM G 34.SAE AS5255 - 2 -3.2 Acceptance Guidance Criterion: Visual appearance of exfoliation shall not be more severe than the specified photo in F
8、igure 1. When this document is called out on a drawing or specification, and no photograph is specified, exfoliation shall not be more severe than Photo B.3.3 A typical microstructure of exfoliation corrosion is presented in Figure 2.PREPARED UNDER THE JURISDICTION OF AMS COMMITTEE “D“SAE AS5255 - 3 -FIGURE 1 - Illustration of Exfoliation Corrosion(Four Degrees of Severity)FIGURE 2 - Typical Microstructure of Exfoliation Corrosion
