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Enhanced Inhibition of Corrosion of Mild Steel by Triazole Derivative in Presence of Copper Ions

机译:铜离子存在下三唑衍生物对低碳钢腐蚀的增强抑制作用

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The inhibition of the corrosion of mild steel in 0.5 M H2SO4 solution by 5-(4-Pyridyl)-1H-1,2,4- triazole-3-thiol (PTT) compound both in the presence and absence of copper ions has been studiedusing potentiodynamic measurements. It has been found that copper ions significantly enhance theinhibiting action of PPT. For instance, while the inhibition efficiency in the presence of 0.15 mM PTTis 23 %, it is tripled when a 0.05 mM of copper ions is added, pointing to the significant synergismbetween the adsorption of PTT and copper ions. The synergistic parameter was found to equal 2.39 in2+ the presence of 0.15 mM PTT + 0.05 mM Cu . The PTT acts as a mixed type inhibitor both in thepresence and absence of copper ions, and it follows Langmuir adsorption isotherm.
机译:在存在和不存在铜离子的情况下,通过5-(4-吡啶基)-1H-1,2,4-三唑-3-硫醇(PTT)化合物均能抑制0.5 M H2SO4溶液中低碳钢的腐蚀。使用电位动力学测量进行研究。已经发现铜离子显着增强了PPT的抑制作用。例如,在0.15 mM PTT的存在下,抑制效率为23%,而在添加0.05 mM铜离子时,抑制效率是原来的三倍,这表明PTT和铜离子的吸附具有显着的协同作用。发现协同参数等于0.15 mM PTT + 0.05 mM Cu的2.39 in2 +。 PTT在存在和不存在铜离子时均充当混合型抑制剂,并且遵循Langmuir吸附等温线。

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