Corrosion Inhibition of Q235 Mild Steel in 0.5 M H2SO4 Solution by Phytic Acid and Synergistic Iodide Additives

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	Corrosion Inhibition of Q235 Mild Steel in 0.5 M H2SO4 Solution by Phytic Acid and Synergistic Iodide Additives
	M. A. Chidiebere; E. E. Oguzie; L. Liu; Y. Li; F. H. Wang
	2014
发表期刊	Industrial & Engineering Chemistry Research
ISSN	0888-5885
卷号	53 期号:18 页码:7670-7679
摘要	The inhibition properties of phytic acid (PA) on Q235 mild steel corrosion in 0.5 M H2SO4 was estimated using electrochemical techniques. Polarization results revealed PA to be a mixed-type inhibitor in 0.5 M H2SO4, with a more pronounced cathodic effect, while impedance results indicate adsorption of the PA species on the steel surface. The values of the synergistic factor with KI were higher than unity indicating that both additives act cooperatively to improve inhibition performance. The adsorption of PA followed the Langmuir adsorption isotherm. The mechanism of chemical adsorption is proposed on the basis of the trend of inhibition efficiency with temperature and the calculated values of the activation energy (E-a). Scanning electron microscopy, atomic force microscopy, and Fourier transform infrared spectroscopy studies revealed the formation of a protective film adsorbed on a mild steel surface. Quantum chemical calculations were used to confirm the ability of phytic acid to adsorb on a steel surface.
部门归属	[chidiebere, maduabuchi a. ; liu, li ; li, ying ; wang, fuhui] chinese acad sci, inst met res, shenyang 110016, peoples r china. [chidiebere, maduabuchi a. ; oguzie, emeka e.] fed univ technol owerri, dept chem, electrochem & mat sci res lab, owerri, nigeria. ; li, y (reprint author), chinese acad sci, inst met res, 62 wencui rd, shenyang 110016, peoples r china. ; liying@imr.ac.cn
关键词	Phosphoric-acid Sulfuric-acid Adsorption Behavior Aluminum Corrosion Carbon-steel Ions Extract Hcl
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/72835
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	M. A. Chidiebere,E. E. Oguzie,L. Liu,et al. Corrosion Inhibition of Q235 Mild Steel in 0.5 M H2SO4 Solution by Phytic Acid and Synergistic Iodide Additives[J]. Industrial & Engineering Chemistry Research,2014,53(18):7670-7679.
APA	M. A. Chidiebere,E. E. Oguzie,L. Liu,Y. Li,&F. H. Wang.(2014).Corrosion Inhibition of Q235 Mild Steel in 0.5 M H2SO4 Solution by Phytic Acid and Synergistic Iodide Additives.Industrial & Engineering Chemistry Research,53(18),7670-7679.
MLA	M. A. Chidiebere,et al."Corrosion Inhibition of Q235 Mild Steel in 0.5 M H2SO4 Solution by Phytic Acid and Synergistic Iodide Additives".Industrial & Engineering Chemistry Research 53.18(2014):7670-7679.