Exploring the role of Sodium dodecyl sulphate in presence of 2thioureidobenzoxazole as enhancer of corrosion inhibition of mild steel in 2M HCl solution

被引:1
作者
Murthy, Ram [1 ]
Krishna, Kanala Raghava [2 ]
Sundaresan, C. N. [1 ]
机构
[1] Sri Sathya Sai Inst Higher Learning, Brindavan Campus, Bengaluru 560067, India
[2] HP Green R&D Ctr, Dept Crude & Fuels Res Lab, Bangalore 560117, Karnataka, India
关键词
Corrosion inhibition; mild steel; Impedance; Adsorption;
D O I
10.20964/2022.09.43
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
In the current communication, we report the role of sodium do-decyl sulphate (SDS) as the corrosion inhibition enhancer for 2-thioureidobenzoxazole (BOT) on mild steel (MS) in 2M Hydrochloric acid electrolyte. Though, 2-thioureidobenzoxazole shows limited inhibition due of the presence of oxygen atom, addition of small quantity of SDS enhances the inhibition by 10-fold. Electrochemical impedance spectroscopy, Tafel measurements and weight loss studies were used in the current work. The variation of temperature on the inhibition efficiency of SDS+BOT on MS surface was explored. The Gibbs free energy of adsorption values showed that inhibition process is spontaneous. Langmuir adsorption was prevalent and the morphological characterization was carried out using scanning electron microscope which indicated the role of SDS as a versatile performance enhancer for BOT. This combination, act as an anodic mixed type inhibitor.
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页数:13
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