Corrosion Reaction of Iron in Phosphatizing Solution

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概要

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• An electrochemical investigation was made on the corrosion reaction of iron in phosphatizing solution to clarify the mechanism of the formation of phosphate coating. Polarization characteristic curves revealed the corrosion of iron to be under cathodic control implying that the formation of phosphate coating occurs thus under cathodic control. The corrosion rate increased considerably by the addition of KNO<SUB>3</SUB> or KNO<SUB>2</SUB> which is used as an accelerator in phosphatization. The formation of phosphate coating was much accelerated by cathodic polarization of iron, but repressed by anodic polarization and rotation of the iron electrode.

• 公益社団法人 日本化学会の論文

著者

• Umegaki Takao

  Department Of Applied Chemistry Graduate School Of Engineering Tokyo Metropolitan University

• Shirakawa Ryokai

  Department of Applied Chemistry, Faculty of Engineering, Tohoku University

• Okabe Taijiro

  Department of Applied Chemistry, Faculty of Engineering

• Umegaki Takao

  Department of Applied Chemistry, Faculty of Engineering, Tohoku University

• Takeda Shiro

  Department of Applied Chemistry, Faculty of Engineering, Tohoku University

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