電気Znめっき鋼板の外観明度に及ぼす電析結晶構造の影響(表面処理・腐食) Effect of Crystal Structure on the Lightness of Zinc Electroplated Steel Sheet(Surface Treatment and Corrosion)

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The lightness of Zn surface electrodeposited with different supporting electrolytes was investigated from the viewpoint of crystal structure and surface morphology using EBSP, AFM and GIXD (Grazing Incidence X-ray Diffraction) techniques. In pulsed current electrolysis containing sodium sulfate for supporting electrolyte, the lightness decreased according to crystal growth of Zn. On the other hand, the lightness remained almost constant in electrolysis containing aluminum sulfate. As for this difference, the usual positive correlation between lightness and preferred orientation of Zn crystal basal plane was not recognized. And GIXD analysis suggested that the crystallographic c axes of Zn electrodeposit using sodium sulfate and aluminum sulfate were roughly oriented perpendicular to the substrate surface, but that there was a small angle deviation inclined in the particular direction to the surface of Zn electrodeposit using sodium sulfate. In contrast, the particular directional deviation was not observed in the surface of Zn electrodeposit using aluminum sulfate. Furthermore, polarization curves of Zn electrodeposition suggested that nuclear generation was enhanced by using aluminum sulfate for supporting electrolyte in comparison with sodium sulfate. From these results, it is presumed that the unregulated crystal growth direction and fast nucleation of Zn crystals with aluminum sulfate caused fine crystal grain. And so, Zn surface possessed excellent smoothness due to its fine crystal facet confirmed by AFM analysis. As a result, it is considered that the lightness is mainly dominated surface smoothness, and that the high lightness of Zn electrodeposit was obtained using aluminum sulfate.

収録刊行物

  • 鐵と鋼 : 日本鐡鋼協會々誌

    鐵と鋼 : 日本鐡鋼協會々誌 92(9), 551-556, 2006-09-01

    社団法人日本鉄鋼協会

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各種コード

  • NII論文ID(NAID)
    110004793168
  • NII書誌ID(NCID)
    AN00151251
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    00211575
  • NDL 記事登録ID
    8083191
  • NDL 雑誌分類
    ZP42(科学技術--金属工学・鉱山工学--鉄鋼)
  • NDL 請求記号
    Z17-356
  • データ提供元
    CJP書誌  NDL  NII-ELS  J-STAGE 
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