Analytical Science and Technology (분석과학)

The Korean Society of Analytical Sciences (한국분석과학회)
권호 표지

Surface Analysis of Cold Rolled Steel Sheets by X-ray Photoelectron Spectroscopy

X-ray Photoelectron Spectroscopy를 이용한 냉연 강판의 표면 분석 연구

  • Lee, Do Hyung (Chemical Analysis Laboratory, Research Institute of Industrial Science and Technology) ;
  • So, Jae Choon (Chemical Analysis Laboratory, Research Institute of Industrial Science and Technology)
  • Received : 1994.03.14
  • Published : 1994.03.25
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Abstract

The corroded surface of cold rolled steel sheet in the process of rinsing after alkali-cleaning was examined by means of X-ray Photoelectron Spectroscopy(XPS). In addition, the surface-treated cold rolled steel with 0.05wt% $Na_5P_3O_{10}$ solution for the purpose of preventing the corrosion was examined by means of XPS and the results were compared with those for the non-treated cold rolled steel. It was found that the corroded surface consists of $Fe_2O_3$, FeO and $Fe(OH)_3$ and the thickness of the oxide layer is about $1500{\AA}$. On the other hand, in the case of surface-treated cold rolled steel, the phosphate layer of $60{\AA}$ thickness was found to act as a protective film over the relatively thin Fe oxide layer.

탈지과정을 거친 냉연 강판을 순수로 세정하는 과정에서 발생하는 rust와 이러한 rust 발생을 방지하기 위하여 0.05%(wt) $Na_5P_3O_{10}$ 용액으로 표면처리한 냉연 강판의 표면은 X-ray Photoelectron Spectroscopy(XPS) 방법으로 비교 분석하였다. Rust가 발생한 냉연 강판의 표면은 $Fe_2O_3$ 및 FeO, 그리고 $Fe(OH)_3$등으로 구성되는 산화층이 $1500{\AA}$정도의 두께로 존재함을 알 수 있었고, 한편 $Na_5P_3O_{10}$ 용액으로 표면처리한 냉연 강판의 표면은 $60{\AA}$정도의 인산염 피막이 얇은 Fe 산화층 위에 존재함으로써 보호 피막의 역할을 한다는 것을 알 수 있었다.

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