Abstract

The effect of adding 5 and 10% of TiB₂ on the corrosion of Udimet 700 (U700) in 1 M HCl including altered concentrations of organic compounds was considered at 25°C by electrochemical methods: potentiodynamic polarization (PP), electrochemical impedance spectroscopy (EIS) and electrochemical frequency modulation (EFM) methods. Microstructure characterization of these alloys was studied by X-ray diffractometer. Tafel plots confirmed that the appearance of examined components had a slight effect on the polarization curves. The Nyquist plots demonstrated that the charge transfer resistance (R_ct) increase for the examined compounds was much higher with compound II compared to compound I. Bode plot revealed that, the total impedance raised with increasing inhibitor concentration and the constant increment in the phase angle shift was clearly related to increasing of the inhibitor concentration adsorbed on alloy species. EFM results showed an agreement with PP and EIS.

中文翻译：

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TiB 2对Udimet 700合金在1 M盐酸溶液中的电化学性能的影响及其对某些有机衍生物的缓蚀作用

摘要

通过电化学方法在25°C下考虑了在1 M HCl中添加5％和10％的TiB ₂对Udimet 700（U700）的腐蚀（包括改变的有机化合物浓度）的影响，方法是通过电势极化（PP），电化学阻抗谱（ EIS）和电化学调频（EFM）方法。用X射线衍射仪研究了这些合金的显微组织。Tafel曲线证实，所检查成分的出现对偏振曲线有轻微影响。奈奎斯特曲线表明电荷转移电阻（R _ct）与化合物I相比，使用化合物II对所检测化合物的增加要高得多。波特图显示，总阻抗随抑制剂浓度的增加而增加，并且相角位移的恒定增加显然与吸附在化合物上的抑制剂浓度的增加有关合金种类。EFM结果表明与PP和EIS达成了协议。