ポリアミド樹脂の硝酸水溶液環境下における腐食挙動の速度論的研究

DOI Web Site 参考文献2件
  • 浜村 武広
    ABB（株）オートメーション·モーション事業部研究開発部
  • 久保内 昌敏
    東京工業大学大学院理工学研究科化学工学専攻
  • 青木 才子
    東京工業大学大学院理工学研究科化学工学専攻
  • 吉田 治
    ABB（株）オートメーション·モーション事業部研究開発部
  • 江島 光彦
    ABB（株）オートメーション·モーション事業部研究開発部
  • 酒井 哲也
    日本大学生産工学部マネジメント工学科

書誌事項

タイトル別名
  • Kinetic Study of the Corrosion Behavior on Polyamide under Nitric Acid Solution
  • ポリアミド ジュシ ノ ショウサン スイヨウエキ カンキョウ カ ニ オケル フショク キョドウ ノ ソクドロンテキ ケンキュウ

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抄録

The corrosion mechanism and its modeling of Polyamide (PA) in nitric acid (HNO3) solution were investigated. The appearances on specimens in HNO3 solution were changed with discoloration while not happen in distill water (DH). The weight change on wet specimens in nitric acid solution linearly increased after the incubation period. The weight change showed that the diffusion of DH and HNO3 solution into PA obeyed Fickian diffusion model except in HNO3 30mass%. Thus, the diffusion rate of each nitric acid concentration and DH were calculated from weight change with wet specimens. From SEC measurements, it was observed that PA by HNO3 solution degraded gradually in the specimen wholly with increasing immersion time. The reaction rate of each HNO3 concentration was calculated from molecular weight change at the surface of the specimen. The corrosion rate equation between PA and HNO3 solution was estimated with the previous diffusion rate and reaction rate. This equation showed that the calculated molecular weight change agreed well with the experimental ones. From this result, it was observed that the degradation of PA by HNO3 solution was of the corroded layer-forming type in the early immersion stage and of the penetration type in the later stage.

収録刊行物

  • 材料

    材料 61 (6), 537-542, 2012

    公益社団法人 日本材料学会

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