Original scientific paper

Corrosion resistance of 316L stainless steel in fuel cell electrolyte

T. T. Chen ; College of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan City, China
S. M. Kang ; College of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan City, China
Y. L. Li ; College of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan City, China

Abstract

The corrosion resistance and semiconductors of passivation film on the surface of 316L stainless steel has been explored using linear polarization，Potentiostatic polarization electrochemical impedance spectroscopy (EIS) and Mott–Schottky analysis in 0,1 / mol/L Na₂SO₄ and 0,01 / mol/L HCl solution in the steady state condition. Based on the Mott-Schottky analysis, the density and thickness of the passivation film are related to the potential formed by the passivation film. The passivation film is an n-type semiconductor. There is no metal ion loss or cation vacancy remaining; when the film forming potential is 0,3 / V, The chemical reaction rate at the interface is slow, and the passivation film is denser than the passivation film formed at other potentials.

Keywords

316L stainless steel; corrosion; polarization; electrolyte; potential

Hrčak ID:

206506

URI

https://hrcak.srce.hr/206506

Publication date:

1.1.2019.

Visits: 1.705 *