in‐situラマン分光法を用いた模擬酸性雨水溶液中における溶融Znめっき鋼板の腐食過程の解析

書誌事項

タイトル別名
  • Analysis of Corrosion Process of Hot-Dip Zinc-Coated Steel Sheets in Simulated Acid Rain Solution with in-situ Raman Spectroscopy
  • in-situラマン分光法を用いた模擬酸性雨水溶液中における溶融Znめっき鋼板の腐食過程の解析
  • in situ ラマン ブンコウホウ オ モチイタ モギ サンセイウ スイヨウエキチュウ ニ オケル ヨウユウ Zn メッキ コウハン ノ フショク カテイ ノ カイセキ

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抄録

Hot-dip zinc-coated steel sheets are used as an outdoor industrial material, but they corrode because of acid rain.<br>In this study, the corrosion process of hot-dip zinc-coated steel sheets in simulated acid rain solution with in-situ Raman spectroscopy has been studied.<br>The current density of specimen decreased with constant potential holding at −0.6V vs. Ag/AgCl in simulated acid rain solution. And, the main peak, ZnSO4·7H2O was detected with in-situ Raman spectroscopy at the time of decreasing current density. Therefore, it is considered to be the case that the following equation describes the reactions that occurred.<br>Zn2++SO42−+7H2O→ZnSO4·7H2O.<br>The current density was decreased by ZnSO4·7H2O because the growth of ZnSO4·7H2O covered surface area of the specimen.<br>Hot-dip zinc-coated steel sheets showed an anticorrosive effect as a result of the hot-dip zinc-coating layer being dissolved by a sacrificial anode function, and ZnSO4·7H2O was formed in the simulated acid rain solution.

収録刊行物

  • 表面技術

    表面技術 59 (4), 247-250, 2008

    一般社団法人 表面技術協会

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