Metal release and formation of surface precipitate at stainless steel grade 316 and Hanks solution interface – Inflammatory response and surface finishing effects

• Published in: Corrosion science Vol. 51; no. 5; pp. 1157 - 1162
• Main Authors: Cieślik, Monika, Reczyński, Witold, Janus, Anna Maria, Engvall, Klas, Socha, Robert P., Kotarba, Andrzej
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.05.2009; Elsevier
• Subjects: A. Stainless steel; Applied sciences; B. SEM; B. XPS; C. Interfaces; Corrosion; Corrosion environments; Exact sciences and technology; Metals. Metallurgy; B. SEM; B. XPS; C. Interfaces; A. Stainless steel; Austenitic stainless steel; Scanning electron microscopy; Precipitate; Surface treatment; Precipitation; Stainless steel-316; Corrosion; Stainless steel; Photoelectron spectrometry; Interface
• ISSN: 0010-938X; 1879-0496; 1879-0496
• DOI: 10.1016/j.corsci.2009.02.012

The influence of surface finishing (polishing and passivation) on the release of Cr, Fe, Ni from the stainless steel 316 implant materials to Hanks solution with or without H 2O 2 (simulating a body inflammatory response) was investigated. The surfaces were characterized by means of SEM EDXS, XPS and Kelvin Probe measurements before and after exposure to the synthetic body fluids. The total metal ions release rates are more than 10 times higher in the presence of H 2O 2, independently of the surface finishing. In the absence of H 2O 2, formation of a surface layer consisting mainly of Ca 3(PO 4) 2 was observed, most likely it was responsible for the observed decrease of the release rates.