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首页> 外文期刊>Journal of Materials Research >Soft x-ray absorption spectroscopy study of electrochemically formed passive layers on AISI 304 and 316L stainless steels
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Soft x-ray absorption spectroscopy study of electrochemically formed passive layers on AISI 304 and 316L stainless steels

机译：在AISI 304和316L不锈钢上电化学形成的钝化层的软X射线吸收光谱研究

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摘要

The structure and composition of passive films electrochemically fOrmed on AISI 304 and 3l6L stainless steels in a chloride-containing solution have been studied by soft x-ray absorption spectroscopy. Soft x-ray absorption spectra were taken at the oxygen ls edge and at the transition metals (Cr, Fe, Ni) 2P edges, making it possible to determine the main contributions to the passive film's composition. The soft x-ray absorption spectra at the Cr 2P edges indicate that in all cases the passive film is mainly formed by Cr_2O_3. Spectra at the Fe and Ni 2P edges exhibit no significant contribution of Ni and Fe oxides to the passive layer composition. However, differences in spectral shape with respect to metallic Ni and Fe suggest the presence of a small amount of hydroxides, which is maximum for the AISI 304 stainless steel polarized at the lowest scan rate. The spectra at the O 1s edges confirm the results obtained at the transition metal edges.
机译：通过软X射线吸收光谱法研究了在含氯化物溶液中电化学形成于AISI 304和3l6L不锈钢上的电化学钝化膜的结构和组成。在氧气ls边缘和过渡金属（Cr，Fe，Ni）2P边缘拍摄了软X射线吸收光谱，从而可以确定对无源膜组成的主要贡献。 Cr 2P边缘的软X射线吸收光谱表明，在所有情况下，钝化膜主要由Cr_2O_3形成。 Fe和Ni 2P边缘的光谱没有显示出Ni和Fe氧化物对钝化层成分的重大贡献。但是，关于金属镍和铁的光谱形状差异表明存在少量氢氧化物，这对于以最低扫描速率极化的AISI 304不锈钢而言是最大的。 O 1s边缘的光谱证实了在过渡金属边缘获得的结果。

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