1、BS ISO 19487:2016Metallic and other inorganiccoatings Electrodepositednickel-ceramics compositecoatingsBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS ISO 19487:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 19487:2016.
2、The UK participation in its preparation was entrusted to Technical Committee STI/33, Electrodeposited and related coatings.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a
3、contract. Users are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 85844 4 ICS 25.220.40 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under t
4、he authority of the Standards Policy and Strategy Committee on 31 December 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 19487:2016 ISO 2016Metallic and other inorganic coatings Electrodeposited nickel-ceramics composite coatingsRevtements mtalliques et autres
5、 revtements inorganiques Dpts lectrolytiques composites de nickel-cramiqueINTERNATIONAL STANDARDISO19487First edition2016-12-01Reference numberISO 19487:2016(E)BS ISO 19487:2016ISO 19487:2016(E)ii ISO 2016 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in SwitzerlandAll rights r
6、eserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either
7、 ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 19487:2016ISO 19487:2016(E)Foreword ivIntroduction v1 Scope . 12
8、Normative references 13 Terms and definitions . 24 Designation 25 Requirements 25.1 Special test specimens 25.2 Appearance and surface roughness 25.3 Thickness . 35.4 Hardness . 35.5 Adhesion . 35.6 Porosity . 35.7 Stress relief heat treatments . 35.8 Hydrogen embrittlement relief . 45.9 Peening 45.
9、10 Internal stress 45.11 Ductility . 46 Sampling 5Annex A (normative) Test methods for determining thickness . 6Annex B (informative) Typical composition and operating conditions of Watts and nickel sulphamate solutions, and mechanical properties of nickel electrodeposited from those solutions . 7Bi
10、bliography 8 ISO 2016 All rights reserved iiiContents PageBS ISO 19487:2016ISO 19487:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried o
11、ut through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO c
12、ollaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different app
13、roval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the
14、subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any t
15、rade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organizati
16、on (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.The committee responsible for this document is ISO/TC 107, Metallic and other inorganic coatings, Subcommittee SC 3, Electrodeposited coatings and related finishes.iv ISO 2016 All rights
17、 reservedBS ISO 19487:2016ISO 19487:2016(E)IntroductionElectrolytic codeposition of ceramic particles into the metal matrix is a low-cost and low-temperature method suitable for producing composite coating. Ceramics particles can be hard oxide or carbides like Al2O3, SiC, Si3N4, TiO2, WC or diamond.
18、 Also, it may include solid lubricants like PTFE, graphite, h-BN or MoS2. Incorporation of such particles can improve mechanical, tribological and anti-corrosion properties of electrodeposited coatings. Nickel being an engineering material, nickel-ceramics composite coating can find wide application
19、 such as cutting tools for semiconductors, heat exchangers, automobile shackle pin, glass moulds. The applications cover machine elements, tools, electronics, micro-system technology, electrochemistry, acoustics, decoration and many more. In addition, electrodeposited nickel-ceramics composite coati
20、ng can be applied in automotive parts including cylinder bores, piston and piston rings to increase engine performance. Nickel-based composites exist as many different types depending upon kind of ceramic particles incorporated, which can differ significantly in their properties. To increase hardnes
21、s and corrosion resistance, hard ceramic particles such as SiC, Si3N4and Al2O3can be used, whereas to increase wear resistance property, mainly self-lubricating solid particles such as h-BN, PTFE or MoS2can be used. It is therefore important to choose the right ceramic particles for a given applicat
22、ion. Typical solution compositions, operating conditions and mechanical properties of electrodeposits from Watts and nickel sulphamate solutions are given in Annex B.The objective of this document is to provide processing and requirements that cover all nickel-based composite system. This enables bo
23、th providers as well as users to easily fabricate the composite system. ISO 2016 All rights reserved vBS ISO 19487:2016BS ISO 19487:2016Metallic and other inorganic coatings Electrodeposited nickel-ceramics composite coatings1 ScopeThis document specifies the requirements for electrodeposited nickel
24、-ceramics composite coatings applied to ferrous and non-ferrous basis metals for engineering purposes. In addition, it enables both providers and users to offer a consistent methodology to fabricate electrodeposited nickel-ceramics composite system.Nickel alloys or composites in which nickel content
25、 is less than 40 vol.% are outside the scope of this document.The designation provides a means of specifying the type of nickel composite coatings appropriate for engineering applications.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of thei
26、r content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 1463, Metal and oxide coatings Measurement of coating thickness Microscopical method
27、ISO 2177, Metallic coatings Measurement of coating thickness Coulometric measurement by anodic dissolutionISO 2361, Electrodeposited nickel coatings on magnetic and non-magnetic substrates Measurement of coating thickness Magnetic methodISO 2819, Metallic coatings on metallic substrates Electrodepos
28、ited and chemically deposited coatings Review of methods available for testing adhesionISO 3497, Metallic coatings Measurement of coating thickness X-ray spectrometric methodsISO 3543, Metallic and non-metallic coatings Measurement of thickness Beta backscatter methodISO 3882, Metallic and inorganic
29、 coatings Review of methods of measurement of thicknessISO 4519, Electrodeposited metallic coatings and related finishes Sampling procedures for inspection by attributesISO 9220, Metallic coatings Measurement of coating thickness Scanning electron microscope methodISO 9587, Metallic and other inorga
30、nic coatings Pretreatment of iron or steel to reduce the risk of hydrogen embrittlementISO 9588, Metallic and other inorganic coatings Post-coating treatments of iron or steel to reduce the risk of hydrogen embrittlementISO 10289, Methods for corrosion testing of metallic and other inorganic coating
31、s on metallic substrates Rating of test specimens and manufactured articles subjected to corrosion testsISO 12686, Metallic and other inorganic coatings Automated, controlled shot-peening of metallic articles prior to nickel, autocatalytic nickel or chromium electroplating, or as a final finishINTER
32、NATIONAL STANDARD ISO 19487:2016(E) ISO 2016 All rights reserved 1BS ISO 19487:2016ISO 19487:2016(E)ISO 14577 (all parts), Metallic materials Instrumented indentation test for hardness and materials parameters3 Terms and definitionsFor the purposes of this document, the terms and definitions given i
33、n ISO 2064, ISO 2080, ISO 4287 and ISO 4526 apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp4 DesignationThe designati
34、on shall comprise the following:a) the term, electrodeposited composite coating;b) the number of this document, ISO 19487;c) a hyphen;d) a solidus (/);e) symbols for the nickel as well as coatings applied prior to and after electroplating, separated by solidi (/) for each stage in the coating sequen
35、ce in the order of application. The coating designation shall include the thickness of the coatings in m.For example, electrodeposited composite coating ISO 19487-Ni30/SiC(25) designates nickel silicon carbide composite 30 m thick which contains 25 vol.% of SiC.5 Requirements5.1 Special test specime
36、nsSpecial test specimens may be used to measure adhesion, thickness, porosity, corrosion, hardness and other properties when the coated articles are of a size or shape that is not suitable for the test, or if it is not practical to submit the coated article to destructive tests because the parts are
37、 few in number or expensive. Special test specimens shall be of the same material, the same metallurgical condition, shall have the same surface condition as the coated articles and shall be processed along with the coated articles that they represent.The use of special or representative test specim
38、ens to determine that the requirements of this document have been met, the number of test specimens to be used, the material from which they shall be made, and their shape and size shall be specified by the purchaser.5.2 Appearance and surface roughnessThe coating on the significant surface shall be
39、 smooth and free from visible defects, such as pits, cracks, blisters, exfoliation, flaking, burned deposits and non-coated areas. The boundaries of electroplating that cover only a portion of the surface, after being machined or otherwise finished as specified by the purchaser, shall be free of bea
40、ds, nodules, growths, jagged edges and other defects.Imperfections in the coating that arise from surface conditions of the basis metal and that persist despite the observance of good electroplating practice shall not be cause for rejection. The acceptance limits for defects of the basis metal shall
41、 be specified by the purchaser.2 ISO 2016 All rights reservedBS ISO 19487:2016ISO 19487:2016(E)Coatings that are to be finished by machining may have slight surface blemishes in the as-deposited condition, provided that these will be eliminated by the machining operation. For articles that are elect
42、roplated and subsequently ground to size, the grinding operation shall be performed with a sulphur-free liquid coolant, and with a sufficiently light cut to prevent cracking. Blisters or cracks, visible to the naked eye, produced by heating or grinding operations performed by the electroplater, shal
43、l be cause for rejection.For ground finishes, 0,4 m Rais termed a commercial finish, and 0,2 m Rais termed a good commercial finish.5.3 ThicknessThe coating thickness specified in the designation shall be the minimum local thickness. The minimum local thickness of an electrodeposited coating shall b
44、e measured at any point of the significant surface that can be touched by a ball 20 mm in diameter, unless otherwise specified.The minimum local thickness of coating shall be measured by one of the methods given in Annex A. The minimum local thickness is typically 5 m to 200 m, depending on the spec
45、ific engineering application.Although there is no technical limitation to the thickness of coating that can be electroplated, there are practical limitations caused by the size and geometry of the articles that make it difficult to achieve smooth surfaces and uniformity of coating thickness, especia
46、lly as nickel thickness is increased. The electroplating operation may have to be interrupted at intermediate stages of processing to machine the coated surface so as to meet appearance and surface roughness requirements. If the electroplating operation is interrupted for this purpose, the machined
47、nickel surface must be re-activated to ensure adhesion of subsequent nickel deposits. Auxiliary anodes may have to be employed to achieve uniformity of deposit thickness.5.4 HardnessWhen hardness is specified, it shall be measured by the method given in ISO 14577 (all parts).5.5 AdhesionThe coated a
48、rticle or a special test specimen shall pass the bend, file or thermal shock tests described in ISO 2819. The specific test or tests to be used shall be specified by the purchaser.It is the responsibility of the electroplater to determine that the method for surface preparation prior to electroplati
49、ng results in a surface capable of meeting the requirements of this subclause.5.6 PorosityElectroplated ferrous articles or special representative test specimens shall be subjected to the hot water porosity test, or the modified ferroxyl test. After testing, the articles shall be rated in accordance with ISO 10289. The part is considered to have failed if the number of pores per part or per unit area exceeds that specified by or agreed between the purchaser and the electroplater.5.7 Stress relief
