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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 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 invites your written comments and suggestions. Copyright 2006 SAE International All rights reserved. No part of this publication may
3、 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: 724-776-4970 (outside USA) Fa
4、x: 724-776-0790 Email: custsvcsae.org SAE WEB ADDRESS:http:/www.sae.org Corrosion-Resistant Steel Parts: Sampling, Inspection and Testing for Surface Passivation NONCURRENT NOTICE This specification has been declared “NONCURRENT” by the Aerospace Materials Division, SAE, as of May, 2006. It is recom
5、mended, therefore, that this specification not be specified for new designs. “NONCURRENT” refers to those specifications which have previously been widely used and which may be required on some existing designs in the future. The Aerospace Materials Division, however, does not recommend these specif
6、ications for future use in new designs. “NONCURRENT” specifications are available from SAE upon request. A similar but not necessarily identical process is covered in the following specification. However, this listing is provided for information only and does not constitute authority to substitute t
7、his specification for the “NONCURRENT” specification. Annex A of AMS 2700, Passivation of Corrosion Resistant Steels AEROSPACE MATERIAL SPECIFICATION AMS-STD-753A IssuedJUL 1998 NoncurrentMAY 2006 Superseding AMS-STD-753 -,-,- AMS-STD-753ASAEAMS-STD-753A - 2 - NOTICE This document has been taken dir
8、ectly from U.S. Military Standard MIL-STD-753C and contains only minor editorial and format changes required to bring it into conformance with the publishing requirements of SAE technical standards. The initial release of this document is intended to replace MIL-STD-753C. Any part numbers establishe
9、d by the original specification remain unchanged. The original Military Standard was adopted as an SAE standard under the provisions of the SAE Technical Standards Board (TSB) Rules and Regulations (TSB 001) pertaining to accelerated adoption of government specifications and standards. TSB rules pro
10、vide for (a) the publication of portions of unrevised government specifications and standards without consensus voting at the SAE Committee level, and (b) the use of the existing government specification or standard format. Under Department of Defense policies and procedures, any qualification requi
11、rements and associated qualified products lists are mandatory for DOD contracts. Any requirement relating to qualified products lists (QPLs) has not been adopted by SAE and is not part of this technical report. CONTENTS ParagraphPage 1.SCOPE3 1.1Scope3 2.APPLICABLE DOCUMENTS3 2.1ASTM Publications3 2
12、.2U.S. Government Publications3 3.DEFINITIONS3 3.1Passivation3 3.2Corrosion-resistant steel3 4.GENERAL REQUIREMENTS4 4.1Sampling and testing4 4.1.1Sampling for tests4 4.1.2Test methods4 4.1.2.1Visual examination for surface contamination4 4.1.2.2Surface contaminant tests (free iron or other contamin
13、ants)4 4.1.2.2.1Test chemicals4 4.2Failure4 5.DETAILED REQUIREMENTS4 5.1Test methods4 6.NOTES5 6.1Intended use5 6.2Copper sulfate test5 6.3Potassium ferricyanide test5 6.4Subject term (keyword) listing5 AMS-STD-753ASAEAMS-STD-753A - 3 - TEST METHODS METHOD 100Water Immersion Test6 METHOD 101High Hum
14、idity Test7 METHOD 102Copper Sulfate Test8 METHOD 103Potassium Ferricyanide-Nitric Acid Solution Test9 METHOD 104Salt Spray Test11 1.SCOPE: 1.1Scope: This standard describes general and detailed methods of sampling and testing for surface passivity of corrosion-resistant steel parts. These tests may
15、 also be useful to determine if there is a need for passivation. 2.APPLICABLE DOCUMENTS: The following publications, of the issue in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein. 2.1ASTM Publications: Available from A
16、STM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. ASTM B 117Salt Spray (Fog) Testing 2.2U.S. Government Publications: Available from DODSSP, Subscription Services Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094. MIL-STD-105 Sampling Procedures and Tables for Inspection
17、 by Attributes 3.DEFINITIONS: 3.1Passivation: Passivation is a final treatment/cleaning process used to remove free iron or other anodic contaminants from the surfaces of corrosion resistant steel parts such that uniform formation of a passive surface is obtained. This treatment induces a more noble
18、 (cathodic) potential onto the part thus enhancing corrosion resistance. -,-,- AMS-STD-753ASAEAMS-STD-753A - 4 - 3.2Corrosion-resistant steel: The term “corrosion-resistant steel” as used herein refers to those alloyed steels containing chromium in excess of 10.5%. 4.GENERAL REQUIREMENTS: 4.1Samplin
19、g and testing: 4.1.1Sampling for tests: Unless otherwise specified, samples used for the tests specified in 4.1.2 shall be chosen in accordance with MIL-STD-105, Inspection Level S-4 with an Acceptable Quality Level (AQL) of 1.0 percent defective. 4.1.2Test methods: 4.1.2.1Visual examination for sur
20、face contamination: Samples chosen in accordance with 4.1.1 shall be visually inspected to determine that none of the surfaces show evidence of contamination such as the presence of metal particles, paint, oil, grease, flux and other contaminants. 4.1.2.2Surface contaminant tests (free iron or other
21、 contaminants): Unless a particular test is specified, samples chosen in accordance with 4.1.1 shall be subjected to one of the test methods specified in 5.1 to determine the presence of free iron or other anodic surface contaminants. 4.1.2.2.1Test chemicals: All required test chemicals shall be Ame
22、rican Chemical Society reagent grade purity. 4.2Failure: Any lot failing to comply with the requirements specified shall be rejected. A lot having failed the specified requirements may be resubmitted for inspection provided that the contractor has removed all defective material or has reworked the l
23、ot. Resubmitted lots shall be subjected to tightened inspection in accordance with MIL-STD-105. AMS-STD-753ASAEAMS-STD-753A - 5 - 5.DETAILED REQUIREMENTS: 5.1Test methods: All detailed test requirements for the determination of free iron or other anodic surface contaminants shall be as specified in
24、the following test methods: 6.NOTES: (This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.) 6.1Intended use: This standard is intended to provide methods for testing the effectiveness of passivation. This standard can also be used to determi
25、ne if there is a need for passivation. 6.2Copper sulfate test: The purpose of the copper sulfate test is to determine the presence of free iron which is usually induced onto the surface of a part during fabrication with steel components. The principle of the test is based on an oxidation-reduction r
26、eaction which causes the aqueous copper ions to deposit or plate out onto the free iron particles. This method is not recommended for use on martensitic 400 series alloys or lower chromium grades (less than 16%) of ferritic 400 series alloys because the copper may plate out onto the parts even thoug
27、h all the free iron has been removed from the surface during passivation. This is due to the higher amount of iron used in the composition of these alloys which makes it difficult to differentiate between a copper deposit that is the result of free iron and one that is the result of the nature of th
28、e alloy. 6.3Potassium ferricyanide test: This test is more sensitive to the presence of metallic iron than the copper sulfate test, see 6.2. Because of its sensitivity, it is recommended for use only on austenitic AISI 200 and 300 series alloys and only when the determination of trace amounts of fre
29、e iron is required. Due to the higher amounts of iron used in the composition of the martensitic and ferritic 400 series alloys, this test may show a positive reaction on these alloys even though all the free iron has been removed from the surface during passivation. Test MethodTitle 100Water Immers
30、ion Test 101High Humidity Test 102Copper Sulfate Test 103Potassium Ferricyanide-Nitric Acid Solution Test 104Salt Spray Test -,-,- AMS-STD-753ASAEAMS-STD-753A - 6 - 6.4Subject term (keyword) listing: Corrosion Resistant Steel Passivation Stainless Steel PREPARED UNDER THE JURISDICTION OF AMS COMMITTEE “F” AMS-STD-753ASAEAMS-STD-753A - 7 - -,-,- AMS-STD-753ASAEAMS-STD-753A - 8 - AMS-STD-753ASAEAMS-STD-753A - 9 - -,-,- AMS-STD-753ASAEAMS-STD-753A - 10 -