Evaluation of passive film behaviour of super austenitic stainless steels at different potential regions using dynamic electrochemical impedance spectroscopy

被引：12
作者：
Nagarajan, S. [1 ]
Raman, V. [1 ]
Rajendran, N. [1 ]
机构：
[1] Anna Univ, Dept Chem, Madras 600025, Tamil Nadu, India
来源：
JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2010年 / 14卷 / 07期
关键词：
Stainless steel; Crevice corrosion; Dynamic electrochemical impedance spectroscopy; Atomic force microscopy; PITTING CORROSION-RESISTANCE; CREVICE CORROSION; NITROGEN; MODEL;
D O I：
10.1007/s10008-009-0948-5
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Potentiodynamic anodic polarisation and dynamic electrochemical impedance spectroscopic (DEIS) measurements were carried out on 316L stainless steel and alloys 926 and 31 in natural seawater in order to assess the crevice corrosion resistance. DEIS measurements were performed over a wide range of potentials covering the corrosion potential, passive region, breakdown region and dissolution region. The impedance measurements in potentiodynamic conditions clearly reveal the changes that occur in the passive layer with change in potential. The impedance spectra at different potential regions were also discussed elaborately. The surface morphology of the alloy after crevice corrosion was studied using optical microscope and atomic force microscopy.
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页码：1197 / 1204
页数：8
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