Electrochemical and passive behaviour of tin alloyed ferritic stainless steel in concrete environment
Abstract
In the present work, the electrochemical behavior and semiconducting properties of a tin alloyed ferritic stainless steel in simulated concrete solution in presence of NaCl were estimated by conventional electrochemical methods such as potentiodynamic polarization, electrochemical impedance spectroscopy, and capacitance measurement (Mott-Schottky approach). The surface passive film was analyzed by X-ray photoelectron spectroscopy. The results revealed a good agreement between pitting corrosion, electrochemical behaviour, and electronic properties. The p and n-type bilayer structure passive film were observed. The increase of Sn4+ oxide species in the passive film shows no beneficial effects on the pitting corrosion. In addition, the dehydration of the passive film was further discussed.
- Publication:
-
Applied Surface Science
- Pub Date:
- May 2018
- DOI:
- 10.1016/j.apsusc.2017.12.243
- Bibcode:
- 2018ApSS..439..232L
- Keywords:
-
- Ferritic stainless steel;
- Pitting corrosion;
- Sn element;
- XPS