Passivation and corrosion behaviours of AISI 316L stainless steel as implant materials in simulated blood environment
نویسندگان
چکیده
The purpose of the study was evaluation of corrosion resistance of steel 316L used in cardiologic treatment mainly for vascular stents. The study analysed influence of electrochemical and chemical treatment of the steel surface, including sterilisation with pressurised water steam, on its corrosion characteristics. The tests were performed in artificial blood plasma simulating human blood environment. In order to simulate the conditions present in blood, the samples were subject to exposure in artificial blood plasma at the temperature T = 37±1C for 30 days. To evaluate the phenomena that take place on the surface of the tested steel, electrochemical impedance spectroscopy was applied. Suggestion of proper variants of surface treatment is of a long-range importance and it will contribute to elaboration of technological conditions with specified parameters of formation of oxide layers on vascular stents. Słowa kluczowe: stali AISI 316L, sztuczne osocze, pasywacja chemiczna, EIS,
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