Abstract
A hard chromium solution has been considered the least efficient of all plating solutions. This is not exactly true if the correct plating conditions are used. The accepted efficiency is only 12% but that is only true for the parameters that were used long ago to make the determination. At 12% efficiency it would be impossible to plate Superconductor wire. The worlds chromium plating shops have been plating at a .001 (.025u) per hour rate since the turn of the century. Shops in the Cleveland, Ohio area have been limiting their plating rate to .006 (152u) since 1935. A few have used .012 (304u) to .030 (762u) per hour for specialized jobs. These figures would indicate the apparent efficiency of the old 100 to 1 chromium, sulfate solution can be higher than 60%.
The industry uses a 3 bus bar tank with wide spacing between anode and cathode. This results in high solution resistance and high heat generation and consequently slow plating rates. The Reversible Rack 2 Bus Bar System uses very close anode to cathode spacings. This results in the high plating rates with improved quality deposits. When first asked to chromium plate pure nickel wire reel to reel in long lengths, companies making reel to reel machines were asked if chromium plating was practical. In every case, the answer was it couldn’t be done. Gold, tin and zinc plating was being done reel to reel. Using the same parameters that were used to determine a chromium solution efficiency was only 12%, these other metal solutions check out close to 100%.
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References
M. A. Green, “Residual Fields in Superconducting Dipole and Quadrupole Magnets,” IEEE Trans, on Nucl.Sci., NS-18, No. 3, p.664 (1971).
E. W. Collings, “Stabilizer Design Considerations in Ultrafine Filament Cu/NbTi Composites,” Sixth NbTi Workshop, Madison, WI, Nov. 12-13, 1986
see also Adv. Cryo. Eng. (Materials) 34, pp.867-878 (1988).
M. A. Green, “Control of the Fields Due to Superconductor Magnetization in the SSC Magnets,” IEEE Trans. Magn. MAG-23, p.506–509 (1987).
M. A. Green, “Control of Higher Multipoles in SSC Dipole Magnets Due to Superconductor Magnetization using Ferromagnetic Material in the Dipole Wedge,” Lawrence Berkeley Laboratory Report LBID-1533, SSC-MAG-661 (1989).
E. W. Collings, K. R. Marken, Jr., and M. D. Sumption, “Design of Coupled or Uncoupled Multifilamentary SSC-Type Strands with Almost Zero Retained Magnetization at Fields Near 0.3 T,” Adv. Cryo. Eng. (Materials) 36, pp.247–254 (1990).
E. W. Collings, K. R. Marken, Jr., and M. D. Sumption, “Design of Multi-filamentary Strand for Superconducting Super Collider (SSC) Applications-Reduction of Magnetizations Due to Proximity-Effect and Persistent Current,” Supercollider 2, Plenum Press, New York, p.581 (1990).
E. W. Collings, K. R. Marken, Jr., and M. D. Sumption, “Interfilament and Intrafilament Magnetization in Fine Filamentary Composite Strands for Precision Dipole Magnet Application,”Cryogemcs 30, September 1990 Supplement, p.48 (1990).
E. W. Collings, K. R. Marken, Jr., M. D. Sumption, G. Iwaki, and S. Sakai, “Design, Fabrication, and Properties of Magnetically Compensated SSC Strands,”IEEE Trans, on Magnetics, MAG-27, No. 2, p.1787 (1991).
F. Brailsford, “Ferromagnetic Domains,” Chap. 7 in Physical Principles of Magnetism, Van Nostrand Company, Ltd., London, pp.173–174 (1966).
G. Iwaki, S. Sakai, Y. Suzuki, et al., “Current Developments of the Cu/Nb-Ti Superconducting Cables for SSC in Hitachi Cable, Ltd.,” Supercollider 2, Plenum Press, New York, p.621 (1990).
M. A. Green, “Control of Higher Multipoles in SSC Dipole Magnets Due to Superconductor Magnetization Using Ferromagnetic Material in the Superconductor Matrix,” Lawrence Berkeley Laboratory Report LBID-1532, SSC-MAG-660 (1989).
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Peger, C.H. (1991). Electroplated Superconducting Wire. In: Nonte, J. (eds) Supercollider 3. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-3746-5_36
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DOI: https://doi.org/10.1007/978-1-4615-3746-5_36
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