Surface analysis of the 2-mercaptobenzothiazole corrosion inhibitor on 6082 aluminum alloy using ToF-SIMS and XPS,Analytical Methods

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Surface analysis of the 2-mercaptobenzothiazole corrosion inhibitor on 6082 aluminum alloy using ToF-SIMS and XPS
Analytical Methods ( IF 2.7 ) Pub Date : 2019/12/12 , DOI: 10.1039/c9ay02293g
Matjaž Finšgar _{1,

2,

3,

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Affiliation

This work presents a surface analytical study of a very thin surface layer of the 2-mercaptobenzothiazole (MBTH) corrosion inhibitor on 6082 aluminum alloy (automotive material) using time-of-flight secondary ion mass spectrometry (ToF-SIMS) and X-ray photoelectron spectroscopy (XPS). Both techniques confirmed the adsorption of MBTH on the AA6082 surface. A characteristic negative-ion ToF-SIMS signal at m/z 165.98 was found for the MBTH molecule, whereas positive-ion ToF-SIMS spectra were less informative for MBTH. A negative-ion SIMS fragmentation pattern of the MBTH molecule was suggested. ToF-SIMS imaging showed that MBTH forms islands of this corrosion inhibitor on the AA6082 surface with higher concentration (patchy adsorption). XPS measurements suggested that MBTH was adsorbed on the surface via an N–S-bridge configuration. In addition, surface characterization was also performed with atomic force microscopy (AFM), field emission scanning electron spectroscopy (FE-SEM), and energy dispersive X-ray spectroscopy (EDXS).

中文翻译：

使用ToF-SIMS和XPS对6082铝合金上的2-巯基苯并噻唑腐蚀抑制剂进行表面分析

这项工作使用飞行时间二次离子质谱（ToF-SIMS）和X射线对2-巯基苯并噻唑（MBTH）缓蚀剂在6082铝合金（汽车材料）上的非常薄的表面层进行了表面分析研究。光电子能谱（XPS）。两种技术均证实了MBTH在AA6082表面上的吸附。m / z处的特征性负离子ToF-SIMS信号对于MBTH分子，发现165.98，而阳离子ToF-SIMS光谱对MBTH的信息较少。提出了MBTH分子的负离子SIMS断裂模式。ToF-SIMS成像表明，MBTH在较高浓度（斑片吸附）的AA6082表面上形成了该缓蚀剂的岛。XPS测量表明MBTH通过N-S桥构型吸附在表面上。此外，还利用原子力显微镜（AFM），场发射扫描电子光谱仪（FE-SEM）和能量色散X射线光谱仪（EDXS）进行了表面表征。

更新日期：2020-02-13

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