RT info:eu-repo/semantics/article
T1 Corrosion properties of a low-nickel austenitic porous stainless steel in simulated body fluids
A1 García Cabezón, Ana Cristina
A1 Martín Pedrosa, Fernando
A1 Blanco Val, María Yolanda
A1 Rodríguez Méndez, María Luz
K1 Anodic polarization
K1 Polarización anódica
K1 Electrochemical impedance spectroscopy
K1 Espectroscopía de impedancia electroquímica
K1 Microstructures
K1 Microestructuras
K1 Stainless steel
K1 Acero inoxidable
AB Nickel can cause severe allergic reactions. Therefore, efforts are made to reduce the content of nickel in austenitic stainless steels (SS). Powder metallurgy (PM) techniques can produce this steel in a highly affordable way. A novel low-nickel high-nitrogen austenitic powder metallurgy PM stainless steel is investigated in terms of corrosion behavior. Nitrogen, because of its gammagenic effect, is the applied sintering atmosphere. Two sintering processes are applied by controlling the sinter-cooling rate (furnace- and water-cooling). This material shows an austenitic microstructure free of precipitates only after the water-cooling process. The electrochemical behavior in two simulated body fluids—phosphate buffered saline (PBS) solution and Ringer solution—are studied. Corrosion behavior is evaluated by means of anodic polarization measurements and cyclic polarization curves. In addition, Electrochemical Impedance Spectroscopy is used to evaluate the corrosion resistance of this steel in PBS at open circuit potential and at 100 mV above corrosion potential. The water-cooling process promotes better corrosion behavior in simulated body fluids for high nitrogen and low nickel than a conventional (high nickel) austenitic PM SS 316LN type.
PB NACE International
SN 1938-159X
YR 2018
FD 2018
LK https://uvadoc.uva.es/handle/10324/49123
UL https://uvadoc.uva.es/handle/10324/49123
LA eng
NO Corrosion: The Journal of Science and Engineering, 2018, vol. 74, n. 6. p. 683-693
NO Producción Científica
DS UVaDOC
RD 12-may-2024