For the corrosion of carbon steel in 1.0 M HCl solution, the new pyrazolone derivatives (PY1 and PY2) have been identified as active corrosion inhibitors. Clear evidence of the inhibitory effect of pyrazolone derivatives is given by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and electrochemical frequency modulation (EFM) measurements. The synthesized compounds were characterized by spectroscopic and 1H-NMR techniques. The purity of compounds was confirmed by TLC. Our findings show that pyrazolone compounds inhibited the corrosion of carbon steel in the acid medium. Inhibition efficiency increases with the increase in concentration of compounds. The inhibition efficiency of PY2 was higher than that of PY1. These inhibitors obey the Temkin adsorption isotherm. It was found that the pyrazolone derivatives act by physisorption on carbon steel.
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机译：对于1.0 M HCl溶液中的碳钢腐蚀，新的吡唑啉酮衍生物（PY1和PY2）已被确定为活性腐蚀抑制剂。电位动力学极化，电化学阻抗谱（EIS）和电化学频率调制（EFM）测量提供了吡唑啉酮衍生物抑制作用的明确证据。合成的化合物通过光谱法和 1 H-NMR技术表征。化合物的纯度通过TLC确认。我们的发现表明，吡唑啉酮化合物可以抑制碳钢在酸性介质中的腐蚀。抑制效率随着化合物浓度的增加而增加。 PY2的抑制效率高于PY1。这些抑制剂遵循Temkin吸附等温线。发现吡唑啉酮衍生物通过物理吸附作用在碳钢上。
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