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1、BS ISO 17334:2008 ICS 25.220.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Metallic and other inorganic coatings Autocatalytic nickel over autocatalytic copper for electromagnetic shielding Licensed Copy: London South Bank University, South Bank Universit
2、y, 02/02/2009 05:38, Uncontrolled Copy, (c) BSI This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2009 BSI 2009 ISBN 978 0 580 54075 2 Amendments/corrigenda issued since publication DateComments BS ISO 17334:2008 National foreword Th
3、is British Standard is the UK implementation of ISO 17334:2008. 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 publicat
4、ion does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Licensed Copy: London South Bank University, South Bank University, 02/02/2009 05:38, Uncon
5、trolled Copy, (c) BSI BS ISO 17334:2008 Reference number ISO 17334:2008(E) ISO 2008 INTERNATIONAL STANDARD ISO 17334 First edition 2008-12-15 Metallic and other inorganic coatings Autocatalytic nickel over autocatalytic copper for electromagnetic shielding Revtements mtalliques et autres revtements
6、inorganiques Dpts autocatalytiques de nickel sur dpts autocatalytiques de cuivre pour protection contre les interfrences lectromagntiques Licensed Copy: London South Bank University, South Bank University, 02/02/2009 05:38, Uncontrolled Copy, (c) BSI BS ISO 17334:2008 ISO 17334:2008(E) PDF disclaime
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10、 DOCUMENT ISO 2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member
11、 body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reserved Licensed Copy: London South Bank University, South Bank Universi
12、ty, 02/02/2009 05:38, Uncontrolled Copy, (c) BSI BS ISO 17334:2008 ISO 17334:2008(E) ISO 2008 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope 1 2 Normative references1 3 Terms and definitions .2 4 Essential information to be supplied by the purchaser.2 5 Designation 3 5.1 Ge
13、neral3 5.2 Coating type.3 5.3 Coating grades.4 5.4 Examples of designations 4 6 Requirements.5 6.1 Substrate 5 6.2 Appearance 5 6.3 Storage5 6.4 Coating composition.5 6.5 Local coating thickness6 6.6 Adhesion.6 6.7 Electrical continuity and integrity6 6.8 Thermal cycling6 6.9 Shielding effectiveness
14、.6 6.10 Special test specimens .7 7 Sampling.7 Annex A (normative) Thickness test methods.8 Bibliography9 Licensed Copy: London South Bank University, South Bank University, 02/02/2009 05:38, Uncontrolled Copy, (c) BSI BS ISO 17334:2008 ISO 17334:2008(E) iv ISO 2008 All rights reserved Foreword ISO
15、(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 out through ISO technical committees. Each member body interested in a subject for which a technical comm
16、ittee 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 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrote
17、chnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the memb
18、er bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifyi
19、ng any or all such patent rights. ISO 17334 was prepared by Technical Committee ISO/TC 107, Metallic and other inorganic coatings, Subcommittee SC 3, Electrodeposited coatings and related finishes. Licensed Copy: London South Bank University, South Bank University, 02/02/2009 05:38, Uncontrolled Cop
20、y, (c) BSI BS ISO 17334:2008 ISO 17334:2008(E) ISO 2008 All rights reserved v Introduction The proliferation of electronic equipment has created a need for methods for shielding components from the hazards of electromagnetic radiation, hazards that can result in the malfunctioning of computers, as w
21、ell as medical, navigational, detonation, telecommunication and other devices. Electromagnetic shielding requirements have been established by government regulations and directives in many parts of the world. The capability of an enclosure, housing or cabinet to prevent electromagnetic radiation fro
22、m being emitted or absorbed is related to its conductivity; hence, metal enclosures are highly effective for electromagnetic shielding purposes. The cost/weight advantages of plastics, however, have led to their widespread use in computer cabinets and other enclosures. Plastics are non-conductive an
23、d as a result, metallic coating methods have been developed to shield components from the interference caused by electromagnetic radiation. An effective method of protecting computer housings from electromagnetic interference involves the autocatalytic deposition of a layer of copper on the plastic
24、housing. To provide durability and corrosion protection, a thin layer of autocatalytic nickel is applied over the autocatalytic copper. Although this method was first utilized in computer housings made of plastics, it is applicable to other substrates and applications. The need for effective shieldi
25、ng will likely intensify and the use of autocatalytic nickel over autocatalytic copper for electromagnetic shielding purposes is expected to increase. This International Standard is intended for use by purchasers in specifying requirements to the electroplater, supplier or processor and is to be ind
26、icated on the part drawing or purchase order. Licensed Copy: London South Bank University, South Bank University, 02/02/2009 05:38, Uncontrolled Copy, (c) BSI BS ISO 17334:2008 Licensed Copy: London South Bank University, South Bank University, 02/02/2009 05:38, Uncontrolled Copy, (c) BSI BS ISO 173
27、34:2008 INTERNATIONAL STANDARD ISO 17334:2008(E) ISO 2008 All rights reserved 1 Metallic and other inorganic coatings Autocatalytic nickel over autocatalytic copper for electromagnetic shielding WARNING This International Standard calls for the use of substances and/or procedures that may be injurio
28、us to health if adequate safety measures are not taken. This International Standard does not address any health hazards, safety or environmental matters associated with its use. It is the responsibility of the user of this International Standard to establish appropriate health, safety and environmen
29、tally acceptable practices and take suitable actions for any national and international regulations. Compliance with this International Standard does not in itself confer immunity from legal obligations. 1 Scope This International Standard specifies the requirements for autocatalytic nickel-phosphor
30、us alloy coatings applied over autocatalytic copper coatings to provide electromagnetic interference (EMI) or electrostatic discharge (ESD) protection for parts fabricated from either plastics or metallic materials. This International Standard does not apply to high-strength steels that are suscepti
31、ble to hydrogen embrittlement. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) appl
32、ies. ISO 2064, Metallic and other inorganic coatings Definitions and conventions concerning the measurement of thickness ISO 2080, Metallic and other inorganic coatings Surface treatment, metallic and other inorganic coatings Vocabulary ISO 2177, Metallic coatings Measurement of coating thickness Co
33、ulometric method by anodic dissolution ISO 2819, Metallic coatings on metallic substrates Electrodeposited and chemically deposited coatings Review of methods available for testing adhesion ISO 2859 (all parts), Sampling procedures for inspection by attributes ISO 3543, Metallic and non-metallic coa
34、tings Measurement of thickness Beta backscatter method ISO 3497, Metallic coatings Measurement of coating thickness X-ray spectrometric methods ISO 3882, Metallic and other inorganic coatings Review of methods of measurement of thickness ISO 4519, Electrodeposited metallic coatings and related finis
35、hes Sampling procedures for inspection by attributes Licensed Copy: London South Bank University, South Bank University, 02/02/2009 05:38, Uncontrolled Copy, (c) BSI BS ISO 17334:2008 ISO 17334:2008(E) 2 ISO 2008 All rights reserved ISO 4525, Metallic coatings Electroplated coatings of nickel plus c
36、hromium on plastics materials ISO 4527, Metallic coatings Autocatalytic (electroless) nickel-phosphorus alloy coatings Specification and test methods ISO 16348, Metallic and other inorganic coatings Definitions and conventions concerning appearance IEC 60454-2, Pressure-sensitive adhesive tapes for
37、electrical purposes Part 2: Methods of test IEC 61587-3, Mechanical structures for electronic equipment Tests for IEC 60917 and IEC 60297 Part 3: Electromagnetic shielding performance tests for cabinets, racks and subracks ASTM D4935, Standard Test Method for Measuring the Electromagnetic Shielding
38、Effectiveness of Planar Materials1) 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 2064, ISO 2080, ISO 16348 and the following apply. 3.1 shielding effectiveness ratio of power received with and without a material present for the same incident power
39、, by the following equation: = 10 (lg P1/P2) where is the shielding effectiveness; P1 is the received power without the material present; P2 is the received power with the material present (see ASTM D4935 or IEC 61587-3). NOTE Shielding effectiveness is usually expressed in decibels (dB). 4 Essentia
40、l information to be supplied by the purchaser When ordering articles to be coated in accordance with this International Standard, the following information shall be provided in writing by the purchaser to the processor or supplier providing the coating services as part of the contract or purchase or
41、der, or on engineering drawings: a) the number of this International Standard and the designation, including the deposit type and grade (see Clause 5); b) the specification and metallurgical condition of metallic substrate and surface condition of polymeric substrate; identifications of assemblies o
42、f dissimilar substrates; polymeric substrates shall be of a plating grade; c) the appearance required (see 6.2); alternatively, samples showing the required finish or range of finish to be supplied; 1) This ASTM standard has been withdrawn. However, copies are still publicly available for purchase o
43、n the ASTM website. Licensed Copy: London South Bank University, South Bank University, 02/02/2009 05:38, Uncontrolled Copy, (c) BSI BS ISO 17334:2008 ISO 17334:2008(E) ISO 2008 All rights reserved 3 d) the significant surfaces, non-significant surfaces, and surfaces that shall be free of any coatin
44、g, as indicated on the engineering drawings or by the provision of suitably marked samples (see Clause 6); e) the requirements for thickness test, and minimum thickness, the adhesion test and the specific test methods for thickness to be used (see 6.5, 6.6 and 6.10); f) the minimum requirements for
45、electrical continuity, the thermal cycle resistance, the specific test method for shielding effectiveness to be used and the minimum requirement for shielding effectiveness (see 6.7, 6.8 and 6.9); g) the sampling methods, acceptance levels or any other inspection requirements (see Clause 7); h) any
46、special requirements, e.g. mechanical roughening of polymeric surfaces to promote adhesion or requirements of any test coupons or test specimens, a porosity test, and the use of any special test specimens or coupons. 5 Designation 5.1 General The designation is a means of specifying the coatings app
47、ropriate for various conditions of service (see Bibliography) and is comprised of the following: a) the term “Autocatalytic coating”; b) the number of this International Standard (ISO 17334) followed by a hyphen; c) the symbol of the substrate or the chemical symbol of the basis metal (or for the pr
48、incipal metal if an alloy) followed by a solidus (/) as follows: PL for a plateable plastic substrate; Fe for iron or steel; Zn for zinc alloys; Al for aluminium or aluminium alloys; Mg for magnesium and magnesium alloys; d) the chemical symbol for autocatalytic copper (Cu); e) a number indicating t
49、he minimum local thickness, in micrometres, of the autocatalytic copper coating; f) the chemical symbol for a nickel-phosphorus alloy coating (NiP) followed by a number in parenthesis giving the percent mass fraction of phosphorus in the coating; g) a number indicating the minimum local thickness, in micrometres, of the autocatalytic nickel coating. See 5.4 for examples of designations. 5.2 Coating type The coating type designates the minimum local thickness of the autocatalytic copper and