Effect of Passivation Treatments on the Corrosion Resistance of PIM 316L Stainless Steel in a PEM Fuel Cell Simulated Environment

Abstract:

In this work, the corrosion resistance of passivated PIM 316L stainless steel specimens was evaluated in 1M H2SO4 + 2 ppm HF solution at room temperature during 28 days of immersion. Passivation was carried out in HNO₃ and H₂SO₄ solutions. The electrochemical behavior of the passivated specimens was assessed through electrochemical impedance spectroscopy and anodic polarization curves. Scanning electron microscopy (SEM) was employed to observe the surface of the specimens before and after the passivation treatments. The results pointed to a strong influence of the passivation conditions on the corrosion resistance of the specimens.

• Periodical: Materials Science Forum (Volumes 727-728)
• Pages: 96-101
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.727-728.96
• Online since: August 2012
• Authors: Isaac Jamil Sayeg, Renato Altobelli Antunes, Mara Cristina Lopes de Oliveira
• Keywords: 316L PIM, Bipolar Plate, Corrosion, Passivation, PEM Fuel Cell

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