Abstract A novel corrosion inhibitor, ((E)-1,5-dimethyl-4-((1-(3-nitrophenyl)ethylidene)amino)-2-phenyl-1,2-dihydro-3H-pyrazol-3-one) (DNPP) was synthesized in high yield by the condensation reaction of 4-aminoantipyrine with 2-nitroacetphenone derived from acetophenone as a starting material and characterized by FT-IR, 1H, and 13C NMR techniques. DNPP was tested against the corrosion of SAE 1012 carbon steel in 15 wt.% HCl solution using electrochemical and surface characterization techniques. Results obtained show that DNPP is effective in retarding the corrosion of SAE 1012 carbon steel. With 4 mM of DNPP, the charge transfer resistance of SAE 1012 in 15 wt.% HCl solution is raised from 17.42 to 140.50 Ω cm2 and the substrate surface is protected by 87%. The inhibition is through adsorption mechanism (mixed-adsorption type) and has been confirmed by SEM and EDAX results. Potentiodynamic polarization results reveal that DNPP acted as a mixed-type corrosion inhibitor. DNPP is a promising candidate for the formulation of an inhibitor cocktail for the strong acid environment.

中文翻译：

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4-[(2-硝基苯乙叉)-氨基]-安替比林在 SAE 1012 碳钢上的 15 wt.% HCl 溶液的合成和防腐研究

摘要 一种新型缓蚀剂，((E)-1,5-dimethyl-4-((1-(3-nitrophenyl)ethylidene)amino)-2-phenyl-1,2-dihydro-3H-pyrazol-3-one ) (DNPP) 通过 4-氨基安替比林与衍生自苯乙酮的 2-硝基苯乙酮作为起始材料的缩合反应以高产率合成，并通过 FT-IR、1H 和 13C NMR 技术表征。使用电化学和表面表征技术测试了 DNPP 在 15 wt.% HCl 溶液中对 SAE 1012 碳钢的腐蚀。获得的结果表明，DNPP 可有效延缓 SAE 1012 碳钢的腐蚀。使用 4 mM DNPP，SAE 1012 在 15 wt.% HCl 溶液中的电荷转移电阻从 17.42 Ω cm2 提高到 140.50 Ω cm2，并且基材表面受到 87% 的保护。这种抑制是通过吸附机制（混合吸附型）进行的，并已被 SEM 和 EDAX 结果证实。动电位极化结果表明 DNPP 作为一种混合型缓蚀剂。DNPP 是配制强酸环境抑制剂混合物的有前途的候选者。