The effect of dry grinding on the oxidation features of 304L stainless steel (SS) in simulated primary water of BWR and PWR was studied. The objective is to demonstrate the influence of mechanical surface treatments on surface state and oxidation behavior of the SS. Thus, the oxide formed on a ground surface and two polished surfaces (down to 2400 with SiC emery paper and with colloidal silica) had been compared. Subsurface characterizations were first performed to describe the microstructural modification induced by the surface treatment. Then, the morphology and the composition of the oxides' duplex structure were characterized by either scanning electron microscopy, transmission electron microscopy or X-Ray photoelectron spectrometry. Finally, the reactivity of the oxidized surfaces was determined ex-situ by a recently developed electrochemical technique based on electrochemical Impedance spectroscopy and Mott-Schotcky approach. The mechanical surface treatment mainly influences the thickness and doping density of the inner oxide; and the composition and morphologies of the outer oxide-hydroxide precipitates in terms of shape and size. This work evidences that the thinner the inner oxide, the higher the doping density. Besides, the impact of the considered environment on oxidation features is also discussed.

研究了干磨对304L不锈钢(SS)在BWR和PWR模拟原水中氧化特性的影响。目的是证明机械表面处理对 SS 的表面状态和氧化行为的影响。因此，比较了在研磨表面和两个抛光表面（使用 SiC 砂纸和胶体二氧化硅的 2400 度）上形成的氧化物。首先进行次表面表征以描述由表面处理引起的微观结构改性。然后，通过扫描电子显微镜、透射电子显微镜或 X 射线光电子能谱法表征氧化物双相结构的形态和组成。最后，氧化表面的反应性是非原位测定的通过最近开发的基于电化学阻抗谱和 Mott-Schotcky 方法的电化学技术。机械表面处理主要影响内部氧化物的厚度和掺杂密度；外层氧化物-氢氧化物的组成和形态在形状和尺寸方面沉淀。这项工作证明内部氧化物越薄，掺杂密度越高。此外，还讨论了所考虑的环境对氧化特征的影响。