Corrosion Science and Technology

  • 제2권5호
  • /
  • Pages.233-237
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  • 2003
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  • 1598-6462(pISSN)
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  • 2288-6524(eISSN)
한국부식방식학회 (The Corrosion Science Society of Korea)
권호 표지

An Investigation of Mild Steel with Nitrogen-containing Inhibitor in Hydrochloric Acid

  • Horng, Y.T. (Department of Materials Science and Engineering, National Tsing-Hua University) ;
  • Tsai, Yi-Liang (Department of Materials Science and Engineering, National Tsing-Hua University) ;
  • Tu, Ching-Fang (China Steel Co., Ltd.) ;
  • Lee, Chien-Ming (China Steel Co., Ltd.) ;
  • Wei, F.I. (China Steel Co., Ltd.) ;
  • Shih, H.C. (Department of Materials Science and Engineering, National Tsing-Hua University)
  • 발행 : 2003.10.01
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초록

Pickling inhibitors can be used to form an adsorbed layer on the metal surface to hinder the discharge of H^+$ and dissolution of metal ions. Nitrogen-containing inhibitors were selected as corrosion inhibitors for mild steel (MS) in pickling acid process. In this study, the addition of inhibitor, the pickling temperatures and the pickling times were the parameters to investigate the effects on the inhibition efficiency (IE) for MS by using weight loss measurement. Preliminary results show that the IE increased with the increase in pickling time from 10 minutes to 60 minutes, and the IE also increased with the increase in temperature at room temperature and $40^{\circ}C$. At the higher temperature. the IE values are higher and almost independent with the pickling time. Furthermore, the potentiodynamic polarization, open circuit corrosion potential-time and corrosion current-time studies show that nitorgen-containing inhibitor behaves predominantly as cathodic polarization. The roughness test and SEM investigation are also studied in this paper.

키워드

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