Laïk Barbara, Richet Morgane, Emery Nicolas, Bach Stephane, Perrière Loïc, Cotrebil Yvan, Russier Vincent, Guillot Ivan, Dubot Pierre
University Paris Est Créteil, CNRS, ICMPE, UMR 7182, 2 rue Henri Dunant, Thiais 94320, France.
Département Chimie, Université d'Evry Val d'Essonne, Bd F. Mitterrand, Evry 91025, France.
ACS Omega. 2024 Sep 18;9(39):40707-40722. doi: 10.1021/acsomega.4c05082. eCollection 2024 Oct 1.
XPS data processing for cobalt and nickel core-level peaks can be complicated. This is especially true when analyzing a mixture of oxide/oxyhydroxide/hydroxide compounds of these metals. The objective of this study is to develop a method for decomposing XPS spectra of 2p core levels for nickel and cobalt-oxidized compounds. This methodology was then employed to study the passivation layer of the CoNi alloy. The analysis of Ni and Co photo peaks using a homemade code based on core-level peak structure and satellites enables us to determine the chemical composition of the surface layer, knowledge of which is particularly important because it is directly linked to the anticorrosive properties it confers on the surface of the oxidized alloy. The XPS analysis, coupled with sequential ion sputtering, revealed that the passive layer of the CoNi alloy is heterogeneously covered with either oxidized cobalt compounds or oxidized nickel compounds. The method used also demonstrates that the chemical heterogeneity is associated with the thickness heterogeneity of the passive layer.
钴和镍的芯能级峰的XPS数据处理可能很复杂。在分析这些金属的氧化物/羟基氧化物/氢氧化物化合物的混合物时尤其如此。本研究的目的是开发一种分解镍和钴氧化化合物2p芯能级XPS光谱的方法。然后采用该方法研究CoNi合金的钝化层。使用基于芯能级峰结构和卫星峰的自制代码对Ni和Co光电子峰进行分析，使我们能够确定表面层的化学成分，了解这一点尤为重要，因为它与赋予氧化合金表面的防腐性能直接相关。XPS分析与顺序离子溅射相结合，表明CoNi合金的钝化层不均匀地覆盖着氧化钴化合物或氧化镍化合物。所使用的方法还表明，化学不均匀性与钝化层的厚度不均匀性有关。
