BS-EN-12330-2000.pdf
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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12330:2000 The Euro
2、pean Standard EN 12330:2000 has the status of a British Standard ICS 25.220.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Corrosion protection of metals Electrodeposited coatings of cadmium on iron or steel Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 06:55:36 G
3、MT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Sector Committee for Materials and Chemicals, was published under the authority of the Standards Committee and comes into effect on 15 August 2000 BSI 08-2000 ISBN 0 580 34834 2 BS EN 123
4、30:2000 Amendments issued since publication Amd. No.DateComments National foreword This British Standard is the official English language version of EN 12330:2000. BS EN 12330:2000, together with BS EN 12329:2000 supersedes BS 1706:1990 which is withdrawn. CAUTION EN 12330 was approved as a European
5、 Standard as it received the requisite support amongst the 19 member bodies of the European Committee for Standardization (CEN). The UK therefore has an obligation to implement EN 12330 as its national standard and to withdraw BS 1706 with which it conflicts. However, your attention is drawn to the
6、fact that the UK did not support this standard on the basis of possible safety implications, these being related to the commencement of heat treatment as described in clause 6. The UK concern is that once a sub-microscopic crack forms in the coated article, at present there is no means for its detec
7、tion and it cannot be removed. Following the initiation of a sub-microscopic crack no subsequent heat treatment can repair the damage already sustained. It is essential therefore that the delay in applying heat treament is as short as practicable. The UK recommendation therefore was to amend the req
8、uirement in clause 6 to heat treatment shall commence as soon as possible, preferably within 1 h, but not later than 3 h after plating in accordance with those conditions given in ISO 9588. The recommendation was not accepted by the CEN Technical Committee responsible for the development of EN 12330
9、. The UK participation in its preparation was entrusted to Technical Committee STI/33, Electrodeposited and related coatings, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for cha
10、nge, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or E
11、uropean publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the neces
12、sary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pag
13、es 2 to 14, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 06:55:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI (8523($1?67$1$5 1250(?(8523e(11( (8523b,6 i.e
14、. as soon as the vigorous chemical reaction has ceased. WARNING The stripping solutions have hazards associated with them and the precautions given in D.1 should be carefully observed. Rinse the articles in running water, if necessary brushing to remove any loose dark deposit (of antimony when using
15、 solution A or solution B) from the surface, dry carefully and reweigh, noting the loss in mass. Calculate the thickness of the cadmium coating, G, in micrometres, from the following equation: r$ P G ? ? = where: Pis the loss in mass, in milligrams; $is the area of the surface under examination, in
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