1、BRITISH STANDARD BS 2657:1974 Specification for Fluoroboric acid and metal fluoroborates for electroplating UDC 621.357.7.035.4:661.659:546.273BS2657:1974 This British Standard, having been approved by the Surface Coatings (other than paints) Industry Standards Committee, was published under the aut
2、horityof the ExecutiveBoardon 29November1974 BSI 01-2000 First published January 1956 First revision November 1974 The following BSI reference relateto the work on this standard: Committee reference SRE/8 Draft for comment 72/41520 DC ISBN 0 580 08048 X Co-operating organizations The Surface Coating
3、s (other than paints) Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: Aluminium Federation Greater London Council Assay Offices Committee of Gr
4、eat Britain Institute of Metal Finishing* Association of Metal Sprayers Institute of Sheet Metal Engineers British Bolt, Nut, Screw and Rivet Federation Institute of Vitreous Enamellers British Jewellers Association Metal Finishing Association* British Metal Finishing Suppliers Association* Ministry
5、 of Defence, Army Department British Non-Ferrous Metals Research Ministry of Defence, Navy Department Association* Ministry of Defence, Procurement Executive British Steel Corporation Motor Cycle Association Ltd. of Great Britain British Steel Industry Society of Motor Manufacturers and Traders Chem
6、ical Industries Association* Ltd.* Electricity Supply Industry in England and Tin Research Institute* Wales* Vitreous Enamel Development Council Electronic Engineering Association* Zinc Development Association* Engineering Equipment Users Association The scientific and industrial organizations marke
7、d with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Institution of Chemical Engineers Society of Chemical Industry Scientific Instruments Manufacturers United Kingdom Cutlery and Silver
8、ware Association Manufacturers Association Amendments issued since publication Amd. No. Date of issue CommentsBS2657:1974 BSI 01-2000 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 Scope 1 2 Reference 1 3 Fluoroboric acid 1 4 Lead fluoroborate solution 1 5 Tin fluorobora
9、te solution 1 6 Copper fluoroborate solution 2 7 Zinc fluoroborate solution 2 Appendix A Apparatus and reagents for use in analytical methods 4 Appendix B Determination of fluoroboric acid in fluoroboric acid 4 Appendix C Determination of free boric acid in fluoroboric acid 4 Appendix D Determinatio
10、n of free fluoroboric acid in copper, lead and zinc fluoroborate solutions 5 Appendix E Determination of free boric acid in metal fluoroborate solutions 5 Appendix F Determination of silica in fluoroboric acid and metal fluoroborate solutions 6 Appendix G Determination of sulphate in fluoroboric aci
11、d and metal fluoroborate solutions 7 Appendix H Determination of iron in fluoroboric acid and metal fluoroborate solutions 7 Appendix J Limit test for heavy metals, other than iron, in fluoroboric acid 9 Appendix K Determination of chloride in fluoroboric acid and stannous fluoroborate solution 9 Ap
12、pendix L Determination of lead in lead fluoroborate solution 9 Appendix M Determination of tin (II) in stannous fluoroborate solution 10 Appendix N Determination of copper in stannous fluoroborate solution and zinc fluoroborate solution 10 Appendix P Determination of copper in copper fluoroborate so
13、lution 11 Appendix Q Determination of zinc in zinc fluoroborate solution 12 Appendix R Determination of lead in zinc fluoroborate solution 13 Publication referred to Inside back coverBS2657:1974 ii BSI 01-2000 Foreword This British Standard is one of a series of standards that has been prepared to meet the requirements of electroplaters, others in the series being: BS 558 A is the total volume of 1N sodium hydroxide solution (ml).
