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 2006 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: 724-776-4970 (outside USA)
4、Fax: 724-776-0790 Email: custsvcsae.org SAE WEB ADDRESS: http:/www.sae.org AMS 2451/5A AEROSPACE MATERIAL SPECIFICATION Issued JUL 1998 Revised MAY 2006 Superseding AMS 2451/5 Plating, Brush, Chromium Hard Deposit, Trivalent RATIONALE AMS 2451/5A is a Five Year Review and update of this specificatio
5、n. 1. SCOPE 1.1 Purpose This specification covers the requirements for brush plating of hard chromium by electrodeposition. 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 mismachi
6、ned parts but usage is not limited to such applications. 1.3 Safety - Hazardous Materials See AMS 2451. 2. APPLICABLE DOCUMENTS See AMS 2451. 3. TECHNICAL REQUIREMENTS See AMS 2451. 3.1 Procedure 3.1.1 Chromium shall be electrodeposited from a trivalent chromium solution in accordance with processin
7、g instructions from the solution manufacturer. 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. Copyright SAE International Provided by IHS under license with SAENot
8、for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS 2451/5A - 2 - 4. QUALITY ASSURANCE PROVISIONS See AMS 2451. 5. PREPARATION FOR DELIVERY See AMS 2451. 6. ACKNOWLEDGMENT See AMS 2451. 7. REJECTIONS See AMS 2451. 8. NOTES See AMS 2451. 8.1 Hardness conversion tabl
9、es for metals are presented in ASTM E 140. 8.2 Key Words Hard chromium, brush plating, selective plating, repair, wear, worn parts, mismachined parts, touch up, color match PREPARED BY AMS COMMITTEE “B” Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
