聚乙二醇双酚 A 环氧氯丙烷共聚物(PEG-BEC)作为 1M HCl 溶液中低碳钢的高效缓蚀剂

Q1 Social Sciences
Jwaher M. AlGhamdi , Shamsuddeen A. Haladu , Nuhu Dalhat Mu'azu , Hissah A. Alqahtani , Mukarram Zubair , Mohammad Saood Manzar , Fatimah Abdulmhsin Alkhowildi , Rola Zafer Mohammed Kuban , Norah Faisal AlSubaie
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引用次数: 0

摘要

本研究采用电化学和失重技术研究了聚乙二醇双酚 A 环氧氯丙烷共聚物(PEG-BEC)在 1 M HCl 中对低碳钢的缓蚀性能。扫描电子显微镜(SEM)和能量色散 X 射线光谱(EDAX)用于表征低碳钢样品的表面形态。随着 PEG-BEC 在腐蚀介质中浓度的升高,腐蚀缓解效率也随之升高,而温度的升高(25 °C -65 °C)则导致抑制能力下降。此外,在流体力学条件下,无论是在没有 PEG-BEC 还是有 PEG-BEC 的情况下,低碳钢的腐蚀都会恶化。仅在 10 ppm 的情况下,25 °C 时的 EIS 抑制效率(IE)就达到了 97.6%。根据电位极化(PDP)技术的观察,PEG-BEC 是一种混合型抑制剂。从静态水接触角(WCA)可以看出,PEG-BEC 的缓蚀作用可归因于分子的吸附以及在钢表面形成的保护膜。朗缪尔等温线最能说明 PEC-BEG 对金属的吸附作用,其 Kads 值较大,表明这是一个热力学稳定的性质抑制过程。得到的 ∆G°ads = -35.138 至 -39.522 kJ/mol 表明,PEG-BEC 自发地吸附在钢上,通过化学吸附和物理吸附过程的结合,有很强的保护低碳钢表面的趋势。ΔHads -53.07 kJ/mol 和 ΔSads= +0.048 kJ/mol-k 分别表明 PEG-BEC 在低碳钢表面的吸附反应是放热反应,同时熵相对增加。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Polyethyleneglycol bisphenol A epichlorohydrin copolymer (PEG-BEC) as a highly efficient inhibitor for mild steel corrosion in 1M HCl solutions

Polyethyleneglycol bisphenol A epichlorohydrin copolymer (PEG-BEC) as a highly efficient inhibitor for mild steel corrosion in 1M HCl solutions

In this work, the corrosion inhibition performance of polyethyleneglycol bisphenol A epichlorohydrin copolymer (PEG-BEC) against mild steel in 1 M HCl was studied by electrochemical and weight loss techniques. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDAX) were applied to characterize the surface morphology of the mild steel samples. The corrosion mitigation efficiency was observed to rise as the concentration of PEG-BEC rises in the corrosive medium while increasing the temperature (25 °C -65 °C) resulting in a drop in the inhibition ability. Furthermore, under hydrodynamic conditions, the corrosion of the mild steel was found to deteriorate both in the absence and presence of PEG-BEC. Just with 10 ppm, an inhibition efficiency (IE) of 97.6% was obtained at 25 °C by EIS. PEG-BEC acts as a mixed-type inhibitor as observed by potentiodynamic polarization (PDP) technique. The observed corrosion inhibition action of PEG-BEC could be ascribed to the adsorption of the molecules and the formation of a protective film on the steel surface as evidenced by static water contact angle (WCA). Langmuir isotherm best describes the PEC-BEG-metal adsorption with large Kads values indicating a thermodynamically stable nature inhibition process. The obtained ∆G°ads = -35.138 to -39.522 kJ/mol indicate that the PEG-BEC spontaneously adsorbed onto the steel with strong tendency to provide protection to the mild steel surface via combination of chemisorption and physisorption processes. The ΔHads -53.07 kJ/mol and ΔSads= +0.048 kJ/mol-k, respectively, suggests an exothermic reaction accompanied by relatively increase in entropy of the PEG-BEC adsorption on the mild steel surface.

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来源期刊
CiteScore
8.40
自引率
0.00%
发文量
100
审稿时长
33 weeks
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