A combined XPS/ToF-SIMS approach for the 3D compositional characterization of Zr-based conversion of galvanized steel
A combined XPS/ToF-SIMS approach for the 3D compositional characterization of Zr-based conversion of galvanized steel
复制标题
用于镀锌钢 Zr 基转化的 3D 成分表征的 XPS/ToF-SIMS 组合方法
DOI：
10.1016/j.apsusc.2021.150166
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发表时间：
2021
影响因子：
6.7
通讯作者：
T. Hauffman
中科院分区：
文献类型：
--
作者：
V. Cristaudo;K. Baert;P. Laha;Mary Lyn C. Lim;Elizabeth Brown;H. Terryn;T. Hauffman
本研究调查的表面和深层特性，和沉积机制的锆基转化膜的热镀锌（HDG）钢基板上的汽车应用，基于锌镀锌浴与少量添加的铝。这一贡献提供了科学的证据的化学不均匀性在表面和沿着深度的Zr基转化膜镀锌钢。为了这个目的，两个衍生物模型系统的定义-纯锌和纯铝-是必不可少的，由于铝富集现象在镀锌钢表面观察。通过基于X射线光电子能谱（XPS）和飞行时间二次离子质谱（ToF-SIMS）与1-keV Cs+溅射的组合方法，对形成Zr基转化涂层之前和之后的样品化学进行3D评估。实验结果提供了以下事实的直接证据：HDG钢上的Zr基转化膜由混合的Zn、Al和Zr羟基氧化物与复合氟（氢）氧化物Zn/Al层顶部上的Zr羟基-/羟基氟化物组合构成，而不是如先前文献中报道的主要由锌（和铝）制成的镀锌层顶部上的纯ZrO 2膜。
The present study investigates the surface and in-depth characteristics, and deposition mechanism of zirconium-based conversion coatings on hot dip galvanized (HDG) steel substrates for automotive applications, based on zinc galvanizing baths with small additions of aluminium. This contribution provides scientific proof of the chemical heterogeneity both at the surface and along the depth of the Zr-based conversion coatings on galvanized steel. To this purpose, the definition of two derivative model systems – pure zinc and pure aluminium – was indispensable due to Al-enrichment phenomena observed at the galvanized steel surface. A 3D evaluation of the sample chemistry before and after formation of the Zr-based conversion coatings was conducted by a combined approach based on X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS) with 1-keV Cs+sputtering. The experimental results provide direct evidence of the fact that Zr-based conversion coatings on the HDG steel are constituted by a mixed Zn, Al and Zr oxyhydroxide in combination with Zr oxy-/hydroxyfluoride on top of a complex fluoride (hydr)oxide Zn/Al layer, rather than a pure ZrO2film on top of the galvanized layer mainly made of zinc (and aluminium) as previously reported in the literature.
影响因子：
8.3
作者：
Elvins, Jonathan;Spittle, John A.;Worsley, David A.
通讯作者：
Worsley, David A.