Benzoic acid-based supramolecular synthons as a corrosion inhibitor for mild steel in 1.0 M HCl and H2SO4 environments

被引:0
作者
Upadhya, H. Sadhana [1 ,2 ]
Kshama, Shetty S. [1 ,2 ]
Vishwas, K. R. [1 ,2 ]
Swamynathan, K. [1 ,3 ]
Choudhuri, Jyoti Roy [4 ]
Rao, P. Srilatha [1 ,2 ]
机构
[1] NITTE Meenakshi Inst Technol Autonomous, Dept Chem, Bangalore 560064, India
[2] Visvesvaraya Technol Univ, Belagavi 590018, India
[3] Raman Res Inst, Soft Condensed Matter Dept, Bengaluru, India
[4] Natl Forens Sci Univ, Dept Forens Sci, Tripura Campus, Agartala, India
关键词
Carboxylic acids; corrosion; inhibition; film-forming inhibitor; impedance spectroscopy; contact angle; SEM; potentiodynamic polarisation; PCT. SIC(P) COMPOSITE; CARBON-STEEL; HYDROCHLORIC-ACID; CARBOXYLIC-ACIDS; SULFURIC-ACID; ALUMINUM; ALLOY; ADSORPTION; THIOSEMICARBAZONE; DERIVATIVES;
D O I
10.1080/00084433.2024.2431383
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
The study explores the use of carboxylic acids as corrosion inhibitors for mild steel in acidic solutions (1 M HCl and 1 M H2SO4). The hydrogen bonding ability of these acids forms a protective film on the steel surface, reducing corrosion. The effect of hydrophobic side chain length was also examined, with both short and long chains influencing inhibition efficiency. Electrochemical methods like potentiodynamic polarisation (PDP)and electrochemical impedance spectroscopy (EIS) showed inhibition efficiencies of 97% in 1.0 M HCl and 99% in 1.0 M H2SO4. Surface studies using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and contact angle (CA) measurements indicated a smoother surface and increased contact angle, suggesting effective corrosion inhibition. Theoretical studies supported the experimental results, showing that the inhibitors adsorb on the steel surface, preventing corrosion. These findings highlight the effectiveness of carboxylic acids in protecting mild steel from corrosion in acidic environments. Les acides carboxyliques sont connus pour leur formation de liaisons hydrog & egrave;ne. On a utilis & eacute; cette propri & eacute;t & eacute; des acides carboxyliques dans le travail en cours et qui est rapport & eacute;e comme barri & egrave;re filmog & egrave;ne & agrave; l'interface entre l'& eacute;lectrode en acier doux et l'& eacute;lectrolyte acide, contr & ocirc;lant ainsi l'attaque des esp & egrave;ces corrosives. On rapporte & eacute;galement ici l'effet des cha & icirc;nes lat & eacute;rales hydrophobes courtes et longues sur l'inhibition de la corrosion. On a analys & eacute; l'efficacit & eacute; de l'inhibition & agrave; l'aide de m & eacute;thodes & eacute;lectrochimiques telles que la polarisation potentiocin & eacute;tique et la spectroscopie d'imp & eacute;dance & eacute;lectrochimique. On a r & eacute;alis & eacute; des & eacute;tudes de surface & agrave; l'aide d'un microscope & eacute;lectronique & agrave; balayage (MEB), et d'une spectroscopie de rayons X & agrave; dispersion d'& eacute;nergie (EDX) et d'& eacute;tudes d'angle de contact (CA) qui sugg & egrave;rent une inhibition de la corrosion. Les & eacute;tudes th & eacute;oriques rapport & eacute;es ici soutiennent les r & eacute;sultats exp & eacute;rimentaux et un mode plausible de contr & ocirc;le de la corrosion. On a constat & eacute; que l'efficacit & eacute; maximale des deux inhibiteurs & eacute;tait de 97% et 99% pour la corrosion de l'acier doux dans le HCl & agrave; 1.0 M et le H2SO4 & agrave; 1.0 M, respectivement. Les techniques d'analyses de surface utilis & eacute;es ici montrent une augmentation de l'angle de contact, une surface plus lisse par rapport & agrave; l'angle et & agrave; la surface en l'absence d'inhibiteurs.
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页数:15
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