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Title: Corrosion Behavior of Coated Low Carbon Steel in a Simulated PEMFC Environment
Authors: Avram, Diana Nicoleta
Davidescu, Corneliu Mircea
Hulka, Iosif 
Dan, Mircea Laurentiu
Stanciu, Elena Manuela 
Pascu, Alexandru 
Mirza Rosca, Julia Claudia 
UNESCO Clasification: 3313 Tecnología e ingeniería mecánicas
Keywords: Corrosion
Electrochemical Evaluation
Laser Cladding
Protective Coatings
Issue Date: 2023
Journal: Materials 
Abstract: Here, potential metallic bipolar plate (BP) materials were manufactured by laser coating NiCr-based alloys with different Ti additions on low carbon steel substrates. The titanium content within the coating varied between 1.5 and 12.5 wt%. Our present study focussed on electrochemically testing the laser cladded samples in a milder solution. The electrolyte used for all of the electrochemical tests consisted of a 0.1 M Na2SO4 solution (acidulated with H2SO4 at pH = 5) with the addition of 0.1 ppm F−. The corrosion resistance properties of the laser-cladded samples was evaluated using an electrochemical protocol, which consisted of the open circuit potential (OCP), electrochemical impedance spectroscopy (EIS) measurements, and potentiodynamic polarization, followed by potentiostatic polarization under simulated proton exchange membrane fuel cell (PEMFC) anodic and cathodic environments for 6 h each. After the samples were subjected to potentiostatic polarization, the EIS measurements and potentiodynamic polarization were repeated. The microstructure and chemical composition of the laser cladded samples were investigated by scanning electron microscopy (SEM) combined with energy-dispersive X-ray spectroscopy (EDX) analysis.
ISSN: 1996-1944
DOI: 10.3390/ma16083056
Source: Materials [EISSN 1996-1944], v. 16 (8), 3056, (Abril 2023)
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