Browsing by Author "Goel S."
Now showing 1 - 2 of 2
Results Per Page
Sort Options
Item Corrosion behavior of laser powder bed fusion manufactured nickel-free stainless steels in high-temperature water(2024-10-01) Goel S.; Bojinov M.; Capek J.; Saario T.; Polatidis E.; Kantonen T.; Salminen A.; Blankenburg M.; Ganvir A.; Que Z.The paper presents a comprehensive investigation of electrochemical behavior of laser powder bed fusion (PBF-LB/M) nickel-free stainless steels in high-temperature water. The PBF-LB/M nickel-free steels processed with various laser parameters and heat treatments exhibit tunable microstructures. Electrochemical impedance spectroscopy (EIS) indicates a 2–3 times lower oxidation rate for the nickel-free steels compared to wrought 316 L. The outer layer crystallites on nickel-free steels are close to pure Fe oxides. The significantly lower concentration of Ni in the inner oxide and at the alloy/oxide interface account for the important variations of the parameters of water reduction/hydrogen oxidation reactions than wrought 316 L.Item Effect of Sulfide Addition on the Corrosion Mechanism of Copper in Saline Groundwater Solution(2024-04-01) Bojinov M.; Goel S.; Ikäläinen T.; Saario T.The interaction of copper with sulfide-containing simulated saline groundwater is studied by electrochemical techniques (voltammetry, current-time transients, and electrochemical impedance spectroscopy, EIS) complemented with surface and cross-sectional microscopic observations and energy dispersive spectroscopic analyses. Both experimental findings and quantitative interpretation of EIS data using previously published kinetic models indicate that no continuous adherent barrier-type layer is formed on Cu in sulfide-containing groundwater, thus precluding the possibility of the development of localized corrosion modes.