Inhibition of Mild Steel Corrosion in Hydrochloric and Sulfuric Acid Media Using a Thiosemicarbazone Derivative

被引:126
作者
Mourya, Punita [1 ]
Banerjee, Sitashree [1 ]
Rastogi, Rashmi Bala [1 ]
Singh, Madan Mohan [1 ]
机构
[1] Banaras Hindu Univ, Indian Inst Technol, Dept Appl Chem, Varanasi 221005, Uttar Pradesh, India
关键词
LOW-CARBON STEEL; COLD-ROLLED STEEL; SCHIFF-BASES; ELECTROCHEMICAL IMPEDANCE; SYNERGISTIC INHIBITION; COPPER CORROSION; WEIGHT-LOSS; ADSORPTION; TEMPERATURE; ALLOY;
D O I
10.1021/ie4012497
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The inhibitive effect of 4-(N,N-dimethylamino)benzaldehyde thiosemicarbazone (DMABT) on the corrosion of mild steel (MS) in 1 N HCl and 1 N H2SO4 solutions was investigated by weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopic measurements. It is inferred on the basis of the obtained results that DMABT is a mixed-type inhibitor, predominantly retarding cathodic reaction in both acidic media through adsorption on a MS surface. Adsorption obeys Langmuir's adsorption isotherm in both acidic media. The observations regarding energy-dispersive X-ray, scanning electron microscopy, and atomic force microscopy confirm the existence of a protective film of the inhibitor on a MS surface. The molecular adsorption of DMABT was ascertained by density functional theory data.
引用
收藏
页码:12733 / 12747
页数:15
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