Nickel‐free, high‐nitrogen austenitic steels (AHNS) have been introduced for biomedical applications, with encouraging results in terms of mechanical and corrosion properties. Here, we tested the corrosion resistance of a nickel‐free high nitrogen steel (FeCrMnMoN0.9) in bovine serum solutions containing 0 or 3 g/L hyaluronic acid (HA), and 0, 3, or 30 mM hydrogen peroxide (H₂O₂) simulating no, moderate, or strong inflammatory conditions, respectively. Nondestructive electrochemical measurements (open circuit potential [OCP], linear polarization resistance “R_P”, and electrochemical impedance spectroscopy) were run in triplicate over 10 hr. The presence of HA had no significant effect either on the stabilized OCP values, or on the corrosion resistance of FeCrMnMoN0.9. Increasing H₂O₂ concentrations shifted the OCP to more electropositive values; the corrosion resistance decreased only at a 30 mM H₂O₂. Final R_P values at 0, 3, and 30 mM H₂O₂ resulted in 1598 ± 276, 1746 ± 308, and 439 ± 47 kΩ cm², respectively. These values were 4–14 times higher, than the R_P values measured on LC‐CoCrMo in our previous study, conducted under identical conditions. While these findings are encouraging, future studies need to focus on tribocorrosive properties of the AHNS to evaluate its applicability in joint replacement.

中文翻译：

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模拟炎症条件下无镍高氮钢 FeCrMnMoN0.9 的耐腐蚀性能

无镍高氮奥氏体钢 (AHNS) 已被引入生物医学应用，在机械和腐蚀性能方面取得了令人鼓舞的结果。在这里，我们测试了无镍高氮钢 (FeCrMnMoN0.9) 在含有 0 或 3 g/L 透明质酸 (HA) 和 0、3 或 30 mM 过氧化氢 (H ₂ O ₂ ) 分别模拟无、中度或强炎症状况。无损电化学测量（开路电位 [OCP]、线性极化电阻“ R _P”和电化学阻抗谱）在 10 小时内一式三份运行。HA的存在对稳定的OCP值或FeCrMnMoN0.9的耐腐蚀性没有显着影响。增加 H ₂ O ₂浓度会使 OCP 变为更多的正电值；耐腐蚀性仅在 30 mM H ₂ O ₂时降低。在 0、3 和 30 mM H ₂ O ₂下的最终R _P值分别为1598 ± 276、1746 ± 308 和 439 ± 47 kΩ cm ²。这些值比R _{P高 4-14 倍}在我们之前的研究中，在相同条件下进行的 LC-CoCrMo 测量值。虽然这些发现令人鼓舞，但未来的研究需要关注 AHNS 的摩擦腐蚀特性，以评估其在关节置换中的适用性。