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首页> 外文期刊>International Journal of Electrochemical Science >Investigation of Some Nonionic Surfactants as Corrosion Inhibitors for Carbon Steel in Sulfuric Acid Medium
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Investigation of Some Nonionic Surfactants as Corrosion Inhibitors for Carbon Steel in Sulfuric Acid Medium

机译：几种非离子表面活性剂在硫酸介质中作为碳钢缓蚀剂的研究

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摘要

Four nonionic surfactants have been investigated as corrosion inhibitors for carbon steel type OL37 in sulfuric acid solution by electrochemical methods, FT-IR spectroscopy and metallurgical microscopy techniques. The influence of inhibitor concentration on the corrosion rate, inhibition effectiveness and surface coverage was analyzed. Results indicate that these surfactants accomplish a great inhibiting action on carbon steel corrosion and acts that a mixed-type inhibitor. The inhibition effect of noionic surfactants may be due to either the adsorption of inhibitor molecules building a protective layer or the constitution of an insoluble complex of the inhibitor adsorption obeys the Langmuir model. The ? negative value of thermodynamic parameter like Gibbs free energy of adsorption ?Gads indicates the spontaneity of adsorption process. Moreover, characterization utilizing FT-IR confirms the adsorption of inhibitors and the constitution of corrosion products on the carbon steel surface. EIS and potentiodynamic polarization results demonstrate its corrosion protection capacity.
机译：通过电化学方法，FT-IR光谱和冶金显微镜技术，已经研究了四种非离子表面活性剂作为OL37型碳钢在硫酸溶液中的腐蚀抑制剂。分析了缓蚀剂浓度对腐蚀速率，缓蚀效果和表面覆盖率的影响。结果表明，这些表面活性剂对碳钢腐蚀起到了很大的抑制作用，并起到了混合型抑制剂的作用。离子型表面活性剂的抑制作用可能是由于吸附分子形成了保护层，或者是由于吸附剂的不溶性复合物的结构服从Langmuir模型所致。 ？热力学参数的负值，如吉布斯的吸附自由能？Gads表示吸附过程的自发性。此外，利用FT-IR进行的表征证实了抑制剂在碳钢表面上的吸附和腐蚀产物的构成。 EIS和电位动力学极化结果证明了其腐蚀防护能力。

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