《BS-ISO-16253-2007.pdf》由会员分享，可在线阅读，更多相关《BS-ISO-16253-2007.pdf（20页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS ISO 16253:2007 Watch-cases and accessories Vapour phase deposited coatings ICS 39.040.10 ? Licensed Copy: London South Bank University, London South Bank University, Thu Dec 20 03:33:14 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS ISO 16253:2007 This British Standard was publish
2、ed under the authority of the Standards Policy and Strategy Committee on 30 November 2007 BSI 2007 ISBN 978 0 580 55071 3 National foreword This British Standard is the UK implementation of ISO 16253:2007. The UK participation in its preparation was entrusted to Technical Committee STI/53, Jewellery
3、. 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 contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity f
4、rom legal obligations. Amendments issued since publication Amd. No. DateComments Licensed Copy: London South Bank University, London South Bank University, Thu Dec 20 03:33:14 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Reference number ISO 16253:2007(E) INTERNATIONAL STANDARD ISO 16253 First edition
5、 2007-10-15 Watch-cases and accessories Vapour phase deposited coatings Botes de montres et leurs accessoires Revtements dposs en phase vapeur BS ISO 16253:2007 Licensed Copy: London South Bank University, London South Bank University, Thu Dec 20 03:33:14 GMT+00:00 2007, Uncontrolled Copy, (c) BSI i
6、i Licensed Copy: London South Bank University, London South Bank University, Thu Dec 20 03:33:14 GMT+00:00 2007, Uncontrolled Copy, (c) BSI iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references. 1 3 Terms and definitions. 2 4 Requirements 2 4.1 Coating. 2 4.2 Base material,
7、 processes and coatings . 3 4.3 Underlayer . 3 5 Test methods. 3 5.1 Test samples . 3 5.2 Visual inspection 3 5.3 Thickness measurement 3 5.4 Adhesion test 4 5.5 Corrosion resistance test 4 5.6 Hardness test 4 5.7 Wear resistance tests. 4 5.8 Measurement of colour 4 6 Identification and marking on t
8、he product. 5 6.1 Identification 5 6.2 Marking on the product 6 Annex A (normative) Visual inspection of vapour phase deposited coatings 7 Annex B (informative) Base material, process and coatings. 8 Annex C (normative) Evaluation of adhesion strength using the scratch test 9 Bibliography. 11 BS ISO
9、 16253:2007 Licensed Copy: London South Bank University, London South Bank University, Thu Dec 20 03:33:14 GMT+00:00 2007, Uncontrolled Copy, (c) BSI iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The w
10、ork 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, governmental and non-govern
11、mental, 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 Directives, Part 2. The
12、 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 casting a vote.
13、 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 16253 was prepared by Technical Committee ISO/TC 114, Horology, Subcommittee SC 6, Precious meta
14、l coverings. BS ISO 16253:2007 Licensed Copy: London South Bank University, London South Bank University, Thu Dec 20 03:33:14 GMT+00:00 2007, Uncontrolled Copy, (c) BSI v Introduction This International Standard has been developed in order to meet the global need for a definition of the requirements
15、 and tests that enable characterization of coatings applied by vapour phase deposition to watch- cases and their accessories. It defines the terms used in connection with the main vapour phase deposition processes, and presents the requirements relating to the appearance and strength of the deposite
16、d coatings, as well as their resistance to physical and chemical attack. On the conclusion of an agreement between the customer and the supplier, some latitude is left as to the choice of standard test methods and determination of acceptable limit values. This International Standard defines a simple
17、 structure, which facilitates identification of the base material, the deposited coatings and their thickness, in order to give information to consumers. It advises manufacturers to provide these indications in the documents supplied with the watch. To protect the consumer, this International Standa
18、rd stipulates the conditions for marking watch-cases and their accessories, as well as the required compliance with ISO 3160-1, which specifies the thickness and minimum gold content for gold alloy coatings. BS ISO 16253:2007 Licensed Copy: London South Bank University, London South Bank University,
19、 Thu Dec 20 03:33:14 GMT+00:00 2007, Uncontrolled Copy, (c) BSI blank Licensed Copy: London South Bank University, London South Bank University, Thu Dec 20 03:33:14 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 1 Watch-cases and accessories Vapour phase deposited coatings 1 Scope This International Sta
20、ndard specifies the general requirements and test methods for hard coatings obtained by vapour phase deposition processes intended to improve mainly the surface aspect and wear and corrosion resistance, and/or to offer protection against contact-allergy. It is applicable to watch-cases and accessori
21、es. 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) applies. ISO 3160-1, Watch-case
22、s and accessories Gold alloy coverings Part 1: General requirements ISO 3160-2, Watch-cases and accessories Gold alloy coverings Part 2: Determination of fineness, thickness, corrosion resistance and adhesion ISO 3160-31), Watch cases and accessories Gold alloy coverings Part 3: Abrasion resistance
23、tests of a type of coating on standard gauges ISO 4524-5, Metallic coatings Test methods for electrodeposited gold and gold alloy coatings Part 5: Adhesion tests ISO 8654, Colours of gold alloys Definition, range of colours and designation ISO 9227, Corrosion test in artificial atmospheres Salt spra
24、y tests EN 12472, Method for the simulation of wear and corrosion for the detection of nickel release from coated items CR 12471, Screening test for nickel release from alloys and coatings in items that come into direct and prolonged contact with the skin 1) Standard cancelled and replaced by ISO 23
25、160 (in preparation). BS ISO 16253:2007 Licensed Copy: London South Bank University, London South Bank University, Thu Dec 20 03:33:14 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 2 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 vapour phase d
26、eposited coating coating that is deposited by the transfer of atoms from a source to the substrate through vapour phase NOTE The transfer can be purely physical (PVD: physical vapour deposition) or can be done through chemical reaction (CVD: chemical vapour deposition). The gas phase transfer can be
27、 used to form chemical compounds like ceramics, by injecting a reactive gas. 3.2 ion plating coating process in which the substrate and the growing layer are continuously receiving impacts of energetic particles, usually ions from the plasma of a glow discharge, accelerated toward the biased substra
28、te 3.3 sputtering coating process in which atoms ejected from a target (cathode) surface by the impacts of gaseous ions from the plasma of a glow discharge, are deposited on to the substrate 3.4 hard coating coating with a hard material such as titanium nitride (TiN) or titanium carbide (TiC) having
29、 a hardness value of more than 1 000 HV (Vickers hardness) 4 Requirements 4.1 Coating 4.1.1 Appearance of coating The appearance of the coating shall be tested according to the method and conditions specified in Annex A. The coating on the significant surface of the coated item shall be free from ha
30、rmful defects or from any sign of a defect which is detrimental to usage, such as coating peel-off, irregular colour tone, roughness, cracks, pits, exposure of base material and any permanent stain. 4.1.2 Thickness of coating The thickness of the coating is specified according to agreement between t
31、he customer and the supplier. The thickness of the coating shall be tested according to one of the methods given in 5.3 and the coating thickness at the significant surface shall comply with the specified thickness. 4.1.3 Adhesion of coating The adhesion of the coating shall be tested according to o
32、ne of the methods given in 5.4 and the coating shall be free from such signs of defective adhesion as peeling or blister. 4.1.4 Corrosion resistance of coating The corrosion resistance of the coating shall be tested according to one of the methods given in 5.5 and shall comply with the specified cri
33、teria, when the corrosion resistance is specified. BS ISO 16253:2007 Licensed Copy: London South Bank University, London South Bank University, Thu Dec 20 03:33:14 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 3 4.1.5 Hardness of coating The hardness of the coating shall be tested according to one of t
34、he methods given in 5.6 and shall comply with the specified value, when the hardness of coating is specified. 4.1.6 Wear resistance of coating The wear resistance of the coating shall be tested according to one of the methods given in 5.7.1 and shall comply with the specified criteria, when the wear
35、 resistance is specified. Considering the very small thickness of the coating, a certain degree of wear of the edges can be considered as acceptable; whereas wear, change of colour or of appearance of the flat or rounded sides (with a large radius), is not acceptable. Where parts are coated with a t
36、hin layer of gold, the wear resistance test can reveal a change in colour, whose criteria for acceptance should be defined between customer and supplier. 4.1.7 Nickel release Where the base material of the coated parts is likely to release nickel, it is recommended to apply to them the method of sim
37、ulation of wear and corrosion, according to 5.7.2. The measured values shall comply with the legislation in force in the country where the product is to be sold. 4.1.8 Colour of coating The colour of the coating shall be measured before and after the wear resistance test, according to the method giv
38、en in 5.8, and shall comply with the specified value, when the colour is specified. 4.2 Base material, processes and coatings It is recommended to customers and suppliers to indicate the base material, the processes and the coatings, using Annex B. 4.3 Underlayer If the substrate requires the deposi
39、t of an underlayer or barrier, its characteristics shall be verified before applying a vapour phase deposited coating, according to the existing standards. 5 Test methods 5.1 Test samples Samples for testing shall be issued from the regular production batch. If it is not possible, a representative s
40、ample shall be prepared from the same base material as the product and treated in the same production batch. 5.2 Visual inspection The visual inspection shall comply with the test method and test conditions specified in Annex A. 5.3 Thickness measurement The measurement of the coating thickness can
41、be made using one of the methods specified in ISO 3160-2. In case of dispute, the measurement of a metallographic section examined by means of a scanning electron microscope shall be the reference. BS ISO 16253:2007 Licensed Copy: London South Bank University, London South Bank University, Thu Dec 2
42、0 03:33:14 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 4 5.4 Adhesion test The adhesion of the coating shall be tested using either one of the test methods specified in ISO 3160-2 (or ISO 4524-5), or the scratch test specified in Annex C. The method and the test conditions shall be agreed upon betwee
43、n the customer and the supplier. NOTE As the scratch test can be influenced by the nature of the base material, the thickness and the stresses in the coating, this test is more appropriate for carrying out comparisons of the adhesion between layers made under the same conditions. 5.5 Corrosion resis
44、tance test The corrosion resistance shall be tested using one or several of the corrosion resistance test methods described in ISO 9227 for the neutral salt spray test and in ISO 3160-2 for the synthetic perspiration test and the porosity test. The choice of test method and test conditions shall be
45、agreed upon between the customer and the supplier. 5.6 Hardness test The hardness test shall be carried out on the surface coating using the Vickers or Knoop method. The load applied to the indenter shall be set so as to produce a depth of indentation in the coating of approximately 10 % of the coat
46、ing thickness, to avoid any influence of the substrate. As an alternative, the nanoindentation method (i.e. Berkovitch indenter) can be used. The choice of test method and of test conditions shall be made by agreement between the customer and the supplier. 5.7 Wear resistance tests 5.7.1 Wear resist
47、ance test in relation with the decorative aspect of the coating The wear resistance shall be tested, applying the method specified in ISO 3160-3, or a method that both parties, the customer and the supplier, can recognize as significant. The choice of test conditions shall be agreed upon between the
48、 customer and the supplier. 5.7.2 Tests for the simulation of wear and corrosion If the measurement of nickel release is necessary or required, the coated items shall be submitted to the tests specified in EN 12472 for the simulation of two years wear and corrosion, followed by the measurement of ni
49、ckel release. A laboratory approved by the customer and the supplier shall carry out the tests according to EN 12472. For the supervision of current production of coated items, the test described in the report CR 12471 can be applied after the tests specified in EN 12472. 5.8 Measurement of colour If a measurement is required, a spectrocolorimeter shall be used to measure the colour of the hard coating and of the decorative gold alloy coating on top of it. It is recommended that the colour