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Chem. J. Chinese Universities ›› 2000, Vol. 21 ›› Issue (S1): 386.

• Chemistry in Surface Science • Previous Articles     Next Articles

In situ Study of Scanning Tunneling Microscopy On Passivation and Pit Corrosion of Stainless Steel

HU Yan-Ling, HU Rong-Gang, SHAO Ming-Hua, LIN Chang-Jian   

  1. Department of Material Science, Department of Chemistry, State Key Laboratory for Physical Chemistry of Solid Surface, Xiamen University, Xiamen 361005
  • Online:2000-12-31 Published:2000-12-31

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Abstract:

Traditional ways to investigate passivation and pitting is indirect electrochemical method.In this article, direct information for topography of ultrathin passivating film is obtained by employing in-situ ECSTM to stainless steel (Cr11Ni13 SS). Passivating potentials including 0V,0.2V, 0.5V and 0.8V (Vs.SCE) are applied to the sample in 0.5M H2SO4+0.02M NaCl respectively, while surface topography is recorded by STM on the same region, with dimension of 800×800 nanometers. ECSTM result provides a microscopic explanation of EIS. The result describes as fig. 1 and fig. 2.

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