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 revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2017 SAE International All rights reserved. No part of this p
3、ublication may 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: +1 724-776-497
4、0 (outside USA) 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:/standards.sae.org/AMS2451/5B AEROSPACE MATERIAL SPECIFICATION AMS2451 /5 REV. B Issued 1998-07 Reaffirmed 2011-04
5、 Revised 2017-04 Superseding AMS2451/5A Plating, Brush, Chromium Hard Deposit, Trivalent RATIONALE AMS2451/5B is a Five-Year Review and update of this specification with a change to 3.3. 1. SCOPE 1.1 Purpose This specification covers the requirements for brush plating of hard chromium by electrodepo
6、sition. 1.2 Application This process has been used typically to improve corrosion and wear resistance, to cosmetically repair chromium deposits and to repair damaged, worn, or mismachined parts, but usage is not limited to such applications. 1.3 Safety - Hazardous Materials Shall be in accordance wi
7、th AMS2451. 2. APPLICABLE DOCUMENTS Shall be in accordance with AMS2451. 3. TECHNICAL REQUIREMENTS Shall be in accordance with AMS2451 and as follows. 3.1 Procedure 3.1.1 Chromium shall be electrodeposited from a trivalent chromium solution in accordance with processing instructions from the solutio
8、n manufacturer. SAE INTERNATIONAL AMS2451 /5B Page 2 of 2 3.2 Properties 3.2.1 Hardness The hardness of the deposit shall be not less than 900 HK, or equivalent, except that this requirement does not apply to deposits specified as cosmetic. 3.3 Hydrogen Embrittlement Shall be in accordance with AMS2
9、451. 4. QUALITY ASSURANCE PROVISIONS Shall be in accordance with AMS2451. 5. PREPARATION FOR DELIVERY Shall be in accordance with AMS2451. 6. ACKNOWLEDGMENT Shall be in accordance with AMS2451. 7. REJECTIONS Shall be in accordance with AMS2451. 8. NOTES Shall be in accordance with AMS2451. 8.1 Revis
10、ion Indicator A change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY AMS COMMITTEE “B”
