The corrosion inhibition effect and adsorption behaviour of 1-phenyl-3-(phenylamino)propan-1-one (PPAPO) on N80 steel in hydrochloric acid solution have been investigated by Fourier transform infrared (FTIR), electrochemical method and scanning electron microscopy. The corrosion inhibition mechanism of PPAPO mixed with Na2WO4 was interpreted from the thermodynamic point of view. The results indicated that PPAPO mixed with Na2WO4 acted as a mixed-type inhibitor. The inhibition film formed on N80 steel surface can increase the charge transfer resistance and prevent the occurrence of corrosion reaction, thereby reducing the corrosion rate of metal surface. The inhibition efficiency was up to 96.65%; the inhibitor PPAPO with Na2WO4 showed good synergistic effect on N80 corrosion behaviour in HCl solution. The adsorption behaviour of inhibitors on N80 steel surface was in accordance with the Langmuir adsorption model and mainly belonged to chemisorption. The adsorption process of PPAPO on N80 surface was spontaneous and irreversible endothermic reaction.

中文翻译：

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1-苯基-3-(苯氨基)丙-1-酮与Na2WO4在N80钢上的电化学和热力学性能。


采用傅里叶变换红外(FTIR)、电化学方法和扫描电镜研究了1-苯基-3-(苯氨基)丙-1-酮(PPAPO)在盐酸溶液中对N80钢的缓蚀效果和吸附行为。从热力学角度解释了PPAPO与Na2WO4混合的缓蚀机理。结果表明PPAPO与Na2WO4混合可作为混合型抑制剂。 N80钢表面形成的缓蚀膜可以增加电荷转移阻力，阻止腐蚀反应的发生，从而降低金属表面的腐蚀速率。抑制效率高达96.65%；缓蚀剂PPAPO与Na2WO4在HCl溶液中对N80腐蚀行为表现出良好的协同作用。缓蚀剂在N80钢表面的吸附行为符合Langmuir吸附模型，主要属于化学吸附。 PPAPO在N80表面的吸附过程是自发且不可逆的吸热反应。