Utilization of pyrazole-perimidine hybrids bearing different substituents as corrosion inhibitors for 304 stainless steel in acidic media
作者:Özlem UĞUZ、Mehmet GÜMÜŞ、Yusuf SERT、İrfan KOCA、Atıf KOCA
DOI:10.1016/j.molstruc.2022.133025
日期:2022.8
Multi-functional heteroatoms and methyl, fluoride, chloride, and bromide substituents of pyrazole derivatives considerably enhanced the inhibition efficiencies of the hybrids. The highest corrosion inhibitive efficiency (as 97.45%) was achieved with PYR-PER3 bearing methyl and bromide anchoring groups on the benzene group of the main PYR-PER structure. Some quantum chemical parameters, EHOMO, ELUMO, ΔE, electronegativity
合成了带有各种锚定基团的水溶性吡唑-哌啶 ( PYR-PER ) 杂化物,并通过电化学阻抗谱 (EIS)、动电位极化 (PDP) 研究了它们在 1.0 M 盐酸中对 304 不锈钢的腐蚀抑制效果。 、开路电位 (OCP) 测量和密度泛函理论 (DFT) B3LYP 泛函结合 6-311++G(d,p) 基组。分析表明,所有PYR-PER杂化物有效地降低了腐蚀电流密度,提高了耐腐蚀性并抑制了 304 不锈钢在 298 K 的 1.0 M 盐酸中的腐蚀。结果表明,杂化物作为一种混合型缓蚀剂发挥作用,阳极抑制优于阴极抑制。吡唑衍生物的多功能杂原子和甲基、氟、氯和溴取代基显着提高了杂化物的抑制效率。PYR-PER3在主要PYR-PER结构的苯基上带有甲基和溴化物锚定基团,可实现最高的腐蚀抑制效率(97.45%) 。一些量子化学参数,E HOMO,E LUMO, Δ E , 电负性, 化学硬度, 化学柔软度