Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova ulica 17, 2000, Maribor, Slovenia.
Anal Bioanal Chem. 2020 Dec;412(30):8431-8442. doi: 10.1007/s00216-020-02981-2. Epub 2020 Nov 2.
This work presents a corrosion study of 2-aminobenzimidazole (ABI) as a corrosion inhibitor for brass in chloride solution. Electrochemical, field emission scanning electron microscopy, atomic force microscopy, and contact angle measurements showed that ABI mitigates brass corrosion after short-, medium-, and long-term immersion periods. Next, a detailed surface analysis of the ABI adsorbed on the brass surface was performed using attenuated total reflectance Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy (XPS), and time-of-flight secondary ion mass spectrometry (ToF-SIMS) techniques. XPS imaging was performed in association with principal component analysis to determine the different phases on the surface. In order to describe the in-depth composition of the ABI surface, an angle-resolved XPS analysis was performed. This analysis was further supported by gas cluster ion beam sputtering to gradually remove the ABI surface layer, and XPS analysis was performed after each sputtering cycle. Finally, TOF-SIMS analyses showed the formation of Cu/Cu-ABI and Zn-ABI compounds, the 2D distribution of ABI-related compounds, and their thermal stability on the brass surface. Graphical abstract.
这项工作研究了 2-氨基苯并咪唑（ABI）作为铜合金在氯离子溶液中的腐蚀抑制剂。电化学、场发射扫描电子显微镜、原子力显微镜和接触角测量表明，ABI 可以减轻铜合金在短、中、长期浸泡后的腐蚀。然后，使用衰减全反射傅里叶变换红外光谱、X 射线光电子能谱（XPS）和飞行时间二次离子质谱（ToF-SIMS）技术对吸附在铜合金表面的 ABI 进行了详细的表面分析。XPS 成像与主成分分析相结合，以确定表面的不同相。为了描述 ABI 表面的深度组成，进行了角度分辨 XPS 分析。这项分析得到了气体团簇离子束溅射的支持，通过逐渐去除 ABI 表面层，并在每个溅射循环后进行 XPS 分析。最后，TOF-SIMS 分析表明在铜合金表面形成了 Cu/Cu-ABI 和 Zn-ABI 化合物、ABI 相关化合物的 2D 分布及其热稳定性。
