Journal of the Metal Finishing Society of Japan
Online ISSN : 1884-3395
Print ISSN : 0026-0614
ISSN-L : 0026-0614
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Volume 17, Issue 9
Displaying 1-6 of 6 articles from this issue
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  • Bright Electrodeposition of Lead-Tin Alloys
    Nobuyasu DONI
    1966 Volume 17 Issue 9 Pages 339-342
    Published: September 20, 1966
    Released on J-STAGE: October 30, 2009
    DOIhttps://doi.org/10.4139/sfj1950.17.339
    JOURNAL FREE ACCESS
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    Mirror-bright electrodeposition of lead-tin alloys was obtained from the fluoborate bath containing reaction products of aldehydes and amines as main brighteners. An example of bath composition and operating conditions was as follows:
    Stannous tin 60g/l
    Lead 25g/l
    Free HBF4 100
    Free H3BO3 25g/l
    Brighteners (20% solution) 40ml/l
    Polyethylene glycol nonylphenyl ether (15H) 60g/l
    β-naphtol 1g/l
    Formaldehyde (37%) 20ml/l
    Temperature 20°C
    Cathode current density 3A/dm2
    Agitation mild
    Anode 60%tin-40% lead
    Formaldehyde and β-naphtol were effective for lowering the range of current density for obtaining bright deposit. When the concentrations of these compounds were lower in the bath, the range of current density for obtaining bright deposit was higher.
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  • Control of Lead-Tin Fluoborate Plating Bath and Analysis of the Deposit
    Saburo KONISHI, Nobuyasu DOHI
    1966 Volume 17 Issue 9 Pages 343-350
    Published: September 20, 1966
    Released on J-STAGE: October 30, 2009
    DOIhttps://doi.org/10.4139/sfj1950.17.343
    JOURNAL FREE ACCESS
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    Each component in the lead-tin fluoborate plating bath would be quantitatively analyzed by the following procedures simply and correctly.
    Pb: After the excess of EDTA being added to the bath, Sn++ was oxidized with H2O2. Then, the solution was masked with triethanolamine and back titrated with Zn++ at pH=10 using BT as indicator.
    Sn++: After Pb was precipitated with H2SO4, titrated by iodometry.
    Free HBF4 and Free H3BO3: After Pb was precipitated with Na2SO4, free HBF4 was determined by alkaline titration with pH-meter to pH=3.5 as the end point. Then, pH was made to 7.0, mannite was added to it, and free H3BO3 was determined by alkaline titration to pH=8.0 as the end point.
    Hydroquinone: Precipitate was filtered off from the solution after the determination of HBF4 and H3BO3 and titrated with Ce+4 using ferroin as indicator after made acidic with H2SO4.
    Lead and tin in the deposit could be determined by the following procedures.
    Pb: Lead-tin plated layer was dissolved by a remover such as Enstrip TL and the excess of EDTA was added to the solution. Then, tin was masked with triethonolamine and back titrated with Zn at pH=10.
    Sn: The above solution wa made acidic with HCl and back titrated with Zn at pH=5 in the warm state using PV as indicator to determine Sn+Pb. Then, Sn was calculated.
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  • Electrodeposition of Alkyl Phenol Resin Paints
    Shigeo TAMEHIRO, Yoshio HAYAFUNE, Seiji USHIAMA
    1966 Volume 17 Issue 9 Pages 351-354
    Published: September 20, 1966
    Released on J-STAGE: October 30, 2009
    DOIhttps://doi.org/10.4139/sfj1950.17.351
    JOURNAL FREE ACCESS
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    Paints for electrodeposition as components of forming films are limited to only several kinds of water soluble synthetic resins.
    This study was pursued for the coating by electrodeposition of our traditional urushiol solution, which is a kind of alkyl phenol resin paints.
    Urushiol was dispersed in polar solvents such as H2O and CH3OH.
    The urushiol polymer film formed by electrodeposition was dried at room temperature or by heating.
    In these experiments, the rate of electrophoresis was determined and the state of colloidal suspension of urushiol was observed under microscope; then, the relationship between the above two phenomena was discovered.
    Furthermore, conditions for the electrodeposition of urushiol were determined in these experiments, and it was recognized that the physical and chemical properties of the polymer film formed on steel could be applied to practical utilization.
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  • [title in Japanese]
    Willibalt Machu, [in Japanese]
    1966 Volume 17 Issue 9 Pages 355-361
    Published: September 20, 1966
    Released on J-STAGE: October 30, 2009
    DOIhttps://doi.org/10.4139/sfj1950.17.355
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1966 Volume 17 Issue 9 Pages 362-368
    Published: September 20, 1966
    Released on J-STAGE: October 30, 2009
    DOIhttps://doi.org/10.4139/sfj1950.17.362
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1966 Volume 17 Issue 9 Pages 369-376
    Published: September 20, 1966
    Released on J-STAGE: October 30, 2009
    DOIhttps://doi.org/10.4139/sfj1950.17.369
    JOURNAL FREE ACCESS
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