1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 6158:2011Metallic and other inorganiccoatings Electrodepositedcoatings of chromium forengineering purposes (ISO6158:2011)BS EN ISO 6158:2011 BRITISH STANDARDNational fo
2、rewordThis British Standard is the UK implementation of EN ISO 6158:2011. It supersedes BS EN ISO 6158:2004 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee STI/33, Electrodeposited and related coatings.A list of organizations represented on this commit
3、tee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. BSI 2011 ISBN 978 0 580 74030 5 ICS Compliance with a British Standard cannot confer immunity from legal obligat
4、ions.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2011.Amendments issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 6158 July 2011 ICS 25.220.40 Supersedes EN ISO 6158:20
5、04English Version Metallic and other inorganic coatings - Electrodeposited coatings of chromium for engineering purposes (ISO 6158:2011) Revtements mtalliques et autres revtements inorganiques - Dpts lectrolytiques de chrome pour usages industriels (ISO 6158:2011) Metallische und andere anorganische
6、 berzge - Galvanische Chromberzge fr technische Zwecke (ISO 6158:2011) This European Standard was approved by CEN on 14 July 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national stand
7、ard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in an
8、y other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Repu
9、blic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE
10、 NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 6158:2011: EBS EN ISO 6158:2011EN ISO 6158:2011 (E) 3 Foreword This documen
11、t (EN ISO 6158:2011) has been prepared by Technical Committee ISO/TC 107 “Metallic and other inorganic coatings“ in collaboration with Technical Committee CEN/TC 262 “Metallic and other inorganic coatings” the secretariat of which is held by BSI. This European Standard shall be given the status of a
12、 national standard, either by publication of an identical text or by endorsement, at the latest by January 2012, and conflicting national standards shall be withdrawn at the latest by January 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of
13、 patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 6158:2004. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this Eu
14、ropean Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and
15、 the United Kingdom. Endorsement notice The text of ISO 6158:2011 has been approved by CEN as a EN ISO 6158:2011 without any modification. BS EN ISO 6158:2011ISO 6158:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definit
16、ions .2 4 Information to be supplied by the purchaser to the processor2 5 Designation 3 6 Requirements.6 7 Sampling.8 Annex A (informative) Typical thickness of chromium specified in engineering applications 9 Annex B (normative) Thickness test methods for electroplated chromium and other metallic c
17、oatings10 Annex C (normative) Determination of cracks and pores in chromium coatings11 Bibliography12 BS EN ISO 6158:2011ISO 6158:2011(E) iv ISO 2011 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO membe
18、r 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 committee has been established has the right to be represented on that committee. International organizations, governmenta
19、l 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 electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directi
20、ves, 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 member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies
21、 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 identifying any or all such patent rights. ISO 6158 was prepared by Technical Committee ISO/TC 107, Metallic and other inorgani
22、c coatings, Subcommittee SC 3, Electrodeposited coatings and related finishes. This third edition cancels and replaces the second edition (ISO 6158:2004), of which it constitutes a minor revision. BS EN ISO 6158:2011ISO 6158:2011(E) ISO 2011 All rights reserved vIntroduction Electrodeposited chromiu
23、m coatings are frequently deposited from hexavalent chromium solutions similar to those used for decorative electroplating. Engineering chromium coatings, however, are generally thicker than decorative ones. Regular or conventional chromium is the type most frequently specified, but porous, cracked
24、or specially profiled surfaces and duplex chromium are also applied to achieve oil-retaining or non-sticking surfaces, or to improve corrosion resistance. Electrodeposited chromium coatings for engineering applications are most often applied directly to the basis metal to increase wear and abrasion
25、resistance, to increase fretting resistance, to reduce static and kinetic friction, to reduce galling and seizing, to increase corrosion resistance, and to build up undersize or worn parts. For protection against severe corrosion, nickel or other metallic undercoats may be applied prior to the elect
26、rodeposition of chromium, or the corrosion resistance of the chromium coating may be increased by alloying, e.g. with molybdenum. BS EN ISO 6158:2011BS EN ISO 6158:2011INTERNATIONAL STANDARD ISO 6158:2011(E) ISO 2011 All rights reserved 1Metallic and other inorganic coatings Electrodeposited coating
27、s of chromium for engineering purposes WARNING This International Standard may not be compliant with some countries health and safety legislations and calls for the use of substances and/or procedures that may be injurious to health if adequate safety measures are not taken. This International Stand
28、ard does not address any health hazards, safety or environmental matters and legislations associated with its use. It is the responsibility of the user of this International Standard to establish appropriate health, safety and environmentally acceptable practices and take suitable actions to comply
29、with 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 requirements for electroplated coatings of hexavalent chromium, with or without undercoats, on ferrous
30、 and non-ferrous metals for engineering purposes. The coating designation provides a means of specifying the thickness of chromium appropriate for typical engineering applications. 2 Normative references The following referenced documents are indispensable for the application of this document. For d
31、ated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1463, Metallic and oxide coatings Measurement of coating thickness Microscopical method ISO 2064, Metallic and other inorganic coatings Defin
32、itions 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 Coulometric method by anodic dissolution ISO 2178, Non-magne
33、tic coatings on magnetic substrates Measurement of coating thickness Magnetic method ISO 2819, Metallic coatings on metallic substrates Electrodeposited and chemically deposited coatings Review of methods available for testing adhesion ISO 3497, Metallic coatings Measurement of coating thickness X-r
34、ay spectrometric method ISO 3543, Metallic and non-metallic coatings Measurement of thickness Beta backscatter method ISO 3882, Metallic and other inorganic coatings Review of methods of measurement of thickness ISO 4516, Metallic and other inorganic coatings Vickers and Knoop microhardness tests BS
35、 EN ISO 6158:2011ISO 6158:2011(E) 2 ISO 2011 All rights reservedISO 4519, Electrodeposited metallic coatings and related finishes Sampling procedures for inspection by attributes ISO 4526, Metallic coatings Electroplated coatings of nickel for engineering purposes ISO 9220, Metallic coatings Measure
36、ment of coating thickness Scanning electron microscope method ISO 9587, Metallic and other inorganic coatings Pretreatment of iron or steel to reduce the risk of hydrogen embrittlement ISO 9588, Metallic and other inorganic coatings Post-coating treatments of iron or steel to reduce the risk of hydr
37、ogen embrittlement ISO 10309, Metallic coatings Porosity tests Ferroxyl test ISO 10587, Metallic and other inorganic coatings Test for residual embrittlement in both metallic-coated and uncoated externally-threaded articles and rods Inclined wedge method ISO 12686, Metallic and other inorganic coati
38、ngs Automated controlled shot-peening of metallic articles prior to nickel, autocatalytic nickel or chromium plating, or as a final finish ISO 15724, Metallic and other inorganic coatings Electrochemical measurement of diffusible hydrogen in steels Barnacle electrode method 3 Terms and definitions F
39、or the purposes of this document, the terms and definitions given in ISO 2064, ISO 2080, ISO 3882, ISO 9587, ISO 9588 and ISO 12686 apply. 4 Information to be supplied by the purchaser to the processor When ordering articles to be processed in accordance with this International Standard, the purchas
40、er shall provide the following essential information in writing, for example, in the contract or purchase order, or on the engineering drawings: a) the designation (see Clause 5); b) the nominal composition or specification, and metallurgical condition of the basis metal including hardness (see 5.3)
41、; in the case of reclaimed articles, it may not be possible to supply this information, and it may, therefore, be difficult to guarantee the quality of the coating; c) the nature, condition and finish of the basis metal if they are likely to affect the serviceability and/or appearance of the coating
42、 (see 6.3); d) the significant surface, indicated by drawings of the articles or by suitably marked samples (see 6.2); e) the requirements for special test specimens (see 6.1); f) the appearance and surface finish of the chromium coating, e.g. as-plated, ground or machined (see 6.2 and 6.3); alterna
43、tively, samples showing the appearance and required finish shall be supplied or approved by the purchaser, and used for comparison purposes (see 6.2); g) the necessity for any treatment to induce compressive stress, e.g. peening before or after electroplating (see 6.10); BS EN ISO 6158:2011ISO 6158:
44、2011(E) ISO 2011 All rights reserved 3h) any special requirements for, or restrictions on, pretreatment, e.g. vapour blasting instead of acid pretreatment; i) positions, where unavoidable, contact marks and the type, size and number of other defects that are acceptable (see 6.2); j) requirements for
45、 undercoats (see 5.5 and 6.11) and stripping (see 6.12); k) the test method to be used to measure thickness (see 6.4) and additional segment of the surface where minimum thickness requirements apply; l) the adhesion and porosity requirements, and test methods (see 6.6 and 6.7, respectively); m) the
46、tensile strength of parts and the requirement for stress-relief heat treatment before electroplating (see 6.8); n) requirements for any embrittlement-relief heat treatment after electroplating, and for hydrogen embrittlement testing (see 6.9); o) the sampling plan and acceptance levels (see Clause 7
47、); p) any additional information, e.g. any special requirements for adhesion (see 6.6). 5 Designation 5.1 General The designation shall appear on engineering drawings, in the purchase order, the contract or in the detailed product specification. The designation specifies, in the order given, the bas
48、is metal, the specific alloy (optional), stress relief requirements, the type and thickness of undercoats, the type and thickness of the electroplated chromium coating, and post-treatments such as heat treatment to reduce susceptibility to hydrogen embrittlement. 5.2 Designation specification The de
49、signation shall comprise the following: a) the term “Electrodeposited coating”; b) the number of this International Standard, i.e. ISO 6158; c) a hyphen; d) the chemical symbol of the basis metal (see 5.3), e.g. Fe (iron or steel); e) a solidus (/); f) stress relief (SR) designation, (see 5.4); g) a solidus (/); h) chemical symbols for the chromium coating, as well as coatings applied prior to chromium electroplating, separated by solidi for each stage in the coating sequence in the
