Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Electronic Behaviors of Passive Films Formed on Fe-Cr and Fe-Cr-Mo Ferritic Stainless Steels Studied by Mott-Schottky and Cyclic Voltammetry Techniques

  • Kim, Suk-Won (School of Metallurgy and Materials Engineering, Kookmin University) ;
  • Yoon, Sang-In (School of Metallurgy and Materials Engineering, Kookmin University) ;
  • Lee, Jae-Bong (School of Metallurgy and Materials Engineering, Kookmin University)
  • Published : 2003.02.01
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Abstract

The effects of Cr content and film formation potential on electronic behaviors of the passive film on Fe-Cr alloys were investigated in borate buffer solution. Influence of pH on passive films of both Fe-Cr and Fe-Cr-Mo alloys was also investigated. Mott-Schottky and cyclic voltammetry techniques were used to elucidate electronic behaviors of passive films and their electrochemical characteristics. AES analysis of passive films was carried out. Results showed that doping density decreased as Cr content and film formation potentials increased. The addition of Mo to Fe-Cr alloy had little influence on donor densities in pH 9.2 solution but some effects on the decrease in donor densities in pH 1.6 acidic solution.

Keywords

Acknowledgement

Supported by : Korea Science and Engineering Foundation (KOSEF)

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