Influence of Titanium Additions on The Electrochemical Behaviour of NiCr/Ti Laser Cladded Coatings

  • D. N. Avram Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University Timisoara, Timisoara, Romania
  • C. M. Davidescu Renewable Energy Research Institute-ICER, Politehnica University Timisoara, Timisoara Romania
  • M. L. Dan Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University Timisoara, Timisoara, Romania
  • E. M. Stanciu Materials Engineering and Welding Department, Transilvania University of Brasov, Brasov, Romania
  • A. Pascu Materials Engineering and Welding Department, Transilvania University of Brasov, Brasov, Romania
  • J. C. Mirza-Rosca Department of Mechanical Engineering, Las Palmas de Gran Canaria University, Tafira, Spain
  • H. Iosif Department of Mechanical Engineering, Las Palmas de Gran Canaria University, Tafira, Spain
DOI: https://doi.org/10.35219/awet.2022.10
Keywords: laser cladding, corrosion, advanced materials, titanium, NiCr/Ti

Abstract

In this research, the electrochemical evaluation of NiCr/Ti laser cladded coatings in simulated polymer electrolyte membrane fuel cells (PEMFCs) environment was investigated. Laser cladding technique was used to develop protective coatings on mild steel substrate using NiCr-based powders mixed with 12.5, 15, 17.5 and 20 wt.% Ti additions. The samples were tested at room temperature in Na2SO4 0.1M + 0.1 ppm F-. The potentiodynamic polarization curves are presented before and after the samples were subjected to accelerated stress tests, for 6 hours each, at +0.736 V (cathodic environment) and at -0.493 V (anodic environment). Afterwards, scanning electron microscopy (SEM) was used to investigate the effect of Ti addition in terms of morphology. Energy-dispersive X-ray spectroscopy (EDS) was performed for chemical evaluation of the surface after corrosion tests.

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Published
2022-11-15
How to Cite
Issue
Vol 33 (2022)
Section
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