Anticorrosion performance of nicotinic acid and nicotinic acid hydrazide blended with optimized potassium iodide against Q235 steel corrosion in acid-chloride medium

doi:10.1016/j.molstruc.2023.136861

IMR OpenIR

	Anticorrosion performance of nicotinic acid and nicotinic acid hydrazide blended with optimized potassium iodide against Q235 steel corrosion in acid-chloride medium
	Njoku, Annuncieta C.1; Njoku, Demian I.2,3,4; Nwanonenyi, Simeon C.1; Anyanwu, Placid I.1; Onyeachu, Ikenna B.5; El Ibrahimi, Brahim 6,7
通讯作者	Njoku, Demian I.(demian@imr.ac.cn)
	2024-02-05
发表期刊	JOURNAL OF MOLECULAR STRUCTURE
ISSN	0022-2860
卷号	1297 页码:19
摘要	The most sorted corrosion-inhibiting additives are composed of compounds that are non-toxic, cheap, and soluble in an aqueous medium without requiring organic solvents or surfactants. Nicotinic acid (NTAD) and nicotinic acid hydrazide (NADH) are naturally derived compounds that are non-toxic, cheap, and very soluble in aqueous media. Hence, the present study investigates their anticorrosion performances in an equal mixture of 0.25 M H2SO4 and 0.5 M NaCl medium which mimics the acidic-chloride medium often encountered in typical industrial descaling and pickling processes. The study considered both the individual compounds and their blend with KI at different concentrations. The anticorrosion as well as the synergistic effects were evaluated with combined electrochemical and gravimetric methods. The low inhibition efficiency (%) approaching 50% and 70% were achieved with the individual NTAD and NADH, respectively, while enhanced inhibition efficiencies reaching 96% and 97% respectively, were achieved when blended respective inhibitors with an optimal KI concentration. The adsorption of the inhibitor molecules followed Langmuir isotherm with the Kads and Delta G0 increasing with the addition of KI. The positive synergistic index values confirmed synergism. The overall anticorrosion process as well as the synergistic effect of KI were validated with complementing intensive spectroscopy (FTIR and XPS analysis) and imaging (SEM and AFFM) methods. The experimental data collaborated with DFT computational and Monte Carlo molecular dynamics simulation studies in divulging the inhibition mechanisms of NTAD and NADH without and with KI blending.
关键词	Synergisms impedance spectroscopy surface imagine inhibition XPS method DFT Monte Carlo
资助者	Institute of Metal Research, Chinese Academy of Sciences ; Department of Applied Science, Hong Kong Metropolitan University, Hong Kong, SAR, China
DOI	10.1016/j.molstruc.2023.136861
收录类别	SCI
语种	英语
资助项目	Institute of Metal Research, Chinese Academy of Sciences[52271079] ; Department of Applied Science, Hong Kong Metropolitan University, Hong Kong, SAR, China
WOS研究方向	Chemistry
WOS类目	Chemistry, Physical
WOS记录号	WOS:001111721100001
出版者	ELSEVIER
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/183350
专题	中国科学院金属研究所
通讯作者	Njoku, Demian I.
作者单位	1.Fed Univ Technol Owerri, Dept Polymer & Text Engn, PMB 1526, Owerri, Imo, Nigeria 2.Chinese Acad Sci, Inst Met Res, Wencui Rd 62, Shenyang 110016, Peoples R China 3.Hong Kong Metropolitan Univ, Dept Appl Sci, Kowloon HK, Hong Kong, Peoples R China 4.Madonna Univ Elele, Dept Ind Chem, Elele, Nigeria 5.Edo State Univ Uzairue, Dept Chem, PMB 04, Auchi, Edo, Nigeria 6.IBNOU ZOHR Univ, Fac Sci, Lab Organ Chem & Phys Chem, Agadir 80000, Morocco 7.IBN ZOHR Univ, Fac Appl Sci, Dept Appl Chem, Ait Melloul 86153, Morocco
推荐引用方式 GB/T 7714	Njoku, Annuncieta C.,Njoku, Demian I.,Nwanonenyi, Simeon C.,et al. Anticorrosion performance of nicotinic acid and nicotinic acid hydrazide blended with optimized potassium iodide against Q235 steel corrosion in acid-chloride medium[J]. JOURNAL OF MOLECULAR STRUCTURE,2024,1297:19.
APA	Njoku, Annuncieta C.,Njoku, Demian I.,Nwanonenyi, Simeon C.,Anyanwu, Placid I.,Onyeachu, Ikenna B.,&El Ibrahimi, Brahim.(2024).Anticorrosion performance of nicotinic acid and nicotinic acid hydrazide blended with optimized potassium iodide against Q235 steel corrosion in acid-chloride medium.JOURNAL OF MOLECULAR STRUCTURE,1297,19.
MLA	Njoku, Annuncieta C.,et al."Anticorrosion performance of nicotinic acid and nicotinic acid hydrazide blended with optimized potassium iodide against Q235 steel corrosion in acid-chloride medium".JOURNAL OF MOLECULAR STRUCTURE 1297(2024):19.