クロム酸イオンと酸化物粉体添加によるアルミニウム交流電解皮膜の硬質化 Combined effects of chromic acid ion and oxide powders on the hard coatings of aluminum oxide film by AC process

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Physical properties and compositions of hard coatings formed by AC process were investigated in comparison with those by DC process. Electrolysis was carried out at current density 3 A/dm<sup>2</sup> and at bath temperature 10-20°C, using a sulfuric acid solution containing chromic acid ion (potassium dichromate, chrome (VI) oxides and oxide powders (aluminum oxide, glass beads). Addition of both potassium dichromate and glass beads provided the best properties in hardness for the AC process films by their combined effects, while the hardness and abrasion properties were improved by the addition of chromic acid ion and oxide powders. These characteristic features are thought to result from an increase in aluminum content in the film by the addition of chromic acid, and also from the levelling of the film surface caused by the addition of oxide powders. But AC process films generally showed lower hardness than DC process films. It is considered, on the basis of AAS, EPMA and SIMS analyses, that this lower hardness is attributable to a smaller amount of aluminum oxide contained in AC process films.

収録刊行物

  • 軽金属

    軽金属 46(8), 389-394, 1996-08-30

    The Japan Institute of Light Metals

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各種コード

  • NII論文ID(NAID)
    10003794347
  • NII書誌ID(NCID)
    AN00069773
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    04515994
  • NDL 記事登録ID
    4021309
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-284
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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