Characteristics of Iron Electrodeposited from Baths Containing Urea and Ammonium Bifluoride

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Bibliographic Information

Other Title
  • 尿素および酸性フッ化アンモニウム添加浴の鉄電着特性
  • Electrodeposition of Iron from Sulfamic Acid Baths (Part 6)
  • スルファミン酸浴による鉄電着 (第6報)

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Description

Effects of some impurities as well as other additives intentionally added on the internal stress were investigated by means of a spiral contractometer. The increase of NO3- or PO23- amount increased the stress; whereas, the addition of PO43- or P2O74- reduced the stress.<br>Furthermore, characteristics of iron electrodeposited from baths containing urea and ammonium bifluoride were studied.<br>The following results were obtained.<br>1) The maximum internal stress was observed at the lowest values of pH and temperature. The stress was decreased with the increase of pH value and rise of temperature at thickness of 30μ.<br>2) The addition of boric acid and hydrazine reduced the stress, but hydroxylamine had little effects on the stress over the concentration range in these studies.<br>3) In the range of 5-15amp/dm2 of current density, the current efficiency was 60-80% and the surface roughness was 1.5-6S at 70°C of bath temperature.<br>4) In the range of 5-15amp/dm2 of current density, the structure of deposit became gradually finer with the increase of current density.<br>5) In the range of 1-2amp/dm2 of current density, the microphotographs of sections showed amellar figures. However, in its range of 5-15amp/dm2, they showed columnar figures.<br>6) In the range of 5-15amp/dm2 of current density, the hardness of deposits was increased with the increase of current density.

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Details 詳細情報について

  • CRID
    1390282679091080192
  • NII Article ID
    130003809507
  • DOI
    10.4139/sfj1950.23.252
  • ISSN
    18843395
    00260614
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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