Dithioamide Derivative as an Efficient Inhibitor for Mild Steel in Hydrochloric Acid

doi:10.3866/PKU.WHXB20100134

	Dithioamide Derivative as an Efficient Inhibitor for Mild Steel in Hydrochloric Acid
	Deng Jun-Ying 1,2; Jiang Xiao-Hui 3; Li Wei-Hua 1; Zhao Xia1 ; Yu Liang-Min 3; Hou Bao-Rong 1
	2010
发表期刊	ACTA PHYSICO-CHIMICA SINICA
卷号	26 期号:1 页码:34-38
文章类型	Article
摘要	Dithio-N,N'-dimethoxypropyldipropionamide (DPDA) was investigated as a corrosion inhibitor for Mild steel in 1 mol.L-1 hydrochloric acid using weight loss test, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), quantum chemical study, and Raman spectroscopy. The weight loss test results showed that DPDA was an excellent inhibitor for mild steel in acid media with an inhibition efficiency of 90.2% at the DPDA concentration of 1x10-3 mol.L-1. The polarization curves indicated that DPDA behaved as a mixed-type inhibitor while the single capacitive loop in the Nyquist plots revealed that the corrosion was a charge transfer controlled process. Inhibition efficiencies increased with the increase of DPDA concentrations, and the values of the inhibition efficiencies, obtained from the weight loss test, potentiodynamic polarization, and EIS, were in reasonable agreement. The absorption of DPDA was found to obey the Langmuir adsorption isotherm. The free energy of adsorption (Delta G(ads)(0)) was found to be -38.65 kJ.mol(-1) and this value indicated that the adsorption was mainly chemisorption. This results from the sharing or/and transfer of electrons from the DPDA molecules to the metal surface to form coordinate bonds. The negative Delta G(ads)(0) value revealed that the adsorption of DPDA was a spontaneous process. Raman spectra suggest that DPDA adsorbed well onto the mild steel surface, and the quantum chemical study showed that the sulphur atoms in the DPDA molecule were the main active sites that resulted in absorption on the surface of the mild steel.
关键词	Inhibitor Dithioamide Derivative Hydrochloric Acid Absorption Potentiodynamic Polarization Electrochemical Impedance Spectroscopy
DOI	10.3866/PKU.WHXB20100134
收录类别	SCI
语种	英语
WOS记录号	WOS:000273849300007
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/32722
专题	海洋环境腐蚀与生物污损重点实验室海洋地质与环境重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Shandong, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Ocean Univ China, Coll Chem & Chem Engn, Qingdao 266003, Shandong, Peoples R China
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Deng Jun-Ying,Jiang Xiao-Hui,Li Wei-Hua,et al. Dithioamide Derivative as an Efficient Inhibitor for Mild Steel in Hydrochloric Acid[J]. ACTA PHYSICO-CHIMICA SINICA,2010,26(1):34-38.
APA	Deng Jun-Ying,Jiang Xiao-Hui,Li Wei-Hua,Zhao Xia,Yu Liang-Min,&Hou Bao-Rong.(2010).Dithioamide Derivative as an Efficient Inhibitor for Mild Steel in Hydrochloric Acid.ACTA PHYSICO-CHIMICA SINICA,26(1),34-38.
MLA	Deng Jun-Ying,et al."Dithioamide Derivative as an Efficient Inhibitor for Mild Steel in Hydrochloric Acid".ACTA PHYSICO-CHIMICA SINICA 26.1(2010):34-38.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Dithioamide Derivati（851KB）	期刊论文	出版稿	限制开放	ODC PDDL	浏览