Effects of Electropolishing Using Phosphoric-Sulfuric Acids Solution to Pure Aluminum A1050 for its Surface Structure and Specular Glossiness

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  • NAKANO Nobuo
    Nakano & Co. Labs Graduate School of Science and Technology, Niigata University
  • NISHIYAMA Takashi
    Graduate School of Science and Technology, Niigata University
  • YAMAUCHI Takeshi
    Graduate School of Science and Technology, Niigata University Faculty of Engineering, Niigata University
  • TSUBOKAWA Norio
    Graduate School of Science and Technology, Niigata University Faculty of Engineering, Niigata University

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  • 純アルミニウムA1050のリン酸－硫酸系電解研磨における電解条件が表面構造と光沢度に及ぼす影響
  • ジュンアルミニウム A1050 ノ リンサン-リュウサンケイ デンカイ ケンマ ニ オケル デンカイ ジョウケン ガ ヒョウメン コウゾウ ト コウタクド ニ オヨボス エイキョウ

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This study surveyed the amount of dissolved aluminum, reflectance of aluminum surfaces, and thicknesses of the anodic oxide films after electropolishing under conditions of several solution temperatures and current densities. Based on results obtained when phosphoric-sulfuric acids were used on pure aluminum A1050, we assessed electropolishing effects on surface structures and specular glosses.<br>Results show the optimum conditions for electropolishing of pure aluminum: current density at 60 °C that is greater than 0.113 A/cm2 and greater than 0.151 A/cm2 at 80 °C. Moreover, electropolishing of pure aluminum with current density 0.151 A/cm2 at 80 °C can provide flat, smooth surfaces having both high reflectance and specular gloss, creating almost no anodic film.

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