Effect of ascorbic acid on mild steel dissolution in sulphuric acid solution investigated by electrochemical polarization and surface probe techniques

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	Effect of ascorbic acid on mild steel dissolution in sulphuric acid solution investigated by electrochemical polarization and surface probe techniques
	E. E. Oguzie; Y. Li; F. H. Wang
	2007
发表期刊	Journal of Applied Electrochemistry
ISSN	0021-891X
卷号	37 期号:10 页码:1183-1190
摘要	The effect of ascorbic acid (AA) on the corrosion of mild steel in sulphuric acid solution has been investigated by open circuit potential (OCP) and polarization measurements. AA was observed to shift the OCP to more positive potentials with increasing concentration. The polarization curves revealed that AA inhibited the anodic metal dissolution reaction, although this effect became negligible at high anodic overpotentials. The trend of inhibition efficiency with concentration showed that efficiency increased rapidly at low concentrations, remained almost steady at intermediate concentrations and increased again at high concentrations. The mechanism of inhibition was considered in terms of initial chemisorption of AA according to the Temkin isotherm, followed by formation of chelate compounds with Fe2+ ions at high concentrations. EDS and AFM analyses of the electrode surface support the proposed inhibition mechanisms.
部门归属	chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. fed univ technol owerri, dept chem, electrochem & mat sci res lab, owerri 1526, nigeria.;li, y (reprint author), chinese acad sci, inst met res, state key lab corros & protect, 62 wencui rd, shenyang 110016, peoples r china;liying@imr.ac.cn
关键词	Mild Steel Ascorbic Acid Chemisorption Chelation Surface Morphology Low-carbon Steel Corrosion Inhibition Phosphoric-acid Adsorption Extract Media
URL	查看原文
WOS记录号	WOS:000249445600012
引用统计	被引频次：21[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/321006/33765
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	E. E. Oguzie,Y. Li,F. H. Wang. Effect of ascorbic acid on mild steel dissolution in sulphuric acid solution investigated by electrochemical polarization and surface probe techniques[J]. Journal of Applied Electrochemistry,2007,37(10):1183-1190.
APA	E. E. Oguzie,Y. Li,&F. H. Wang.(2007).Effect of ascorbic acid on mild steel dissolution in sulphuric acid solution investigated by electrochemical polarization and surface probe techniques.Journal of Applied Electrochemistry,37(10),1183-1190.
MLA	E. E. Oguzie,et al."Effect of ascorbic acid on mild steel dissolution in sulphuric acid solution investigated by electrochemical polarization and surface probe techniques".Journal of Applied Electrochemistry 37.10(2007):1183-1190.