Abstract The study investigates an influence of carbonyl iron (CI) particles’ corrosion on magnetorheological performance of their silicone-oil suspensions. Carbonyl iron particles were oxidized thermally at 500 °C in the air or chemically in 0.05 HCl solution and the as-treated particles were subsequently used as a dispersed phase in magnetorheological suspensions. Corrosive layer on surface of oxidized particles was investigated using X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). Obtained rheological data was treated with Robertson–Stiff (R–S) model to determine yield stress values and in order to find the yield stress values of prepared magnetorheological (MR) suspensions at saturation level a mathematical model was used. The suspensions based on oxidized particles showed lower values of the yield stress, which was significantly manifested at higher magnetic field intensities due to lower saturation magnetization of the particles.

中文翻译：

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羰基铁颗粒腐蚀过程对其悬浮液磁流变行为的影响

摘要 本研究调查了羰基铁 (CI) 颗粒的腐蚀对其硅油悬浮液磁流变性能的影响。羰基铁颗粒在空气中在 500 °C 下热氧化或在 0.05 HCl 溶液中化学氧化，随后将处理后的颗粒用作磁流变悬浮液中的分散相。使用 X 射线光电子能谱 (XPS) 和 X 射线衍射 (XRD) 研究了氧化颗粒表面的腐蚀层。使用 Robertson-Stiff (R-S) 模型处理获得的流变数据以确定屈服应力值，并且为了找到制备的磁流变 (MR) 悬浮液在饱和水平下的屈服应力值，使用了数学模型。基于氧化颗粒的悬浮液显示出较低的屈服应力值，