Effect of aluminium microstructure on corrosion and inhibiting effect of polyacrylic acid in H(2)SO(4) solution

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	Effect of aluminium microstructure on corrosion and inhibiting effect of polyacrylic acid in H(2)SO(4) solution
	S. A. Umoren; Y. Li; F. H. Wang
	2011
发表期刊	Journal of Applied Electrochemistry
ISSN	0021-891X
卷号	41 期号:3 页码:307-315
摘要	The corrosion behaviour of a microcrystalline aluminium (mc-Al) coating fabricated from pure cast aluminium substrate by magnetron sputtering and the pure polycrystalline aluminium (pc-Al) were studied using electrochemical impedance spectroscopy and potentiodynamic polarization techniques in aerated 0.5 M H(2)SO(4) at 30 +/- A 1 A degrees C. The corrosion inhibiting effect of polyacrylic acid (PAA) and synergistic effect of iodide ions was also investigated. Results obtained show that surface microcrystallization increases the corrosion susceptibility of pure cast aluminium leading to decrease in interfacial impedance and an increase in the kinetics of the anodic dissolution. Introduction of PAA into the corrosive medium was observed to retard the corrosion rates of both specimens. The inhibition mechanism was affected by the microstructure of the sample. PAA functions as a mixed inhibitor but under cathodic control for pc-Al and under anodic control for mc-Al. Addition of iodide ions synergistically increased the inhibition efficiency of PAA and this effect was more pronounced with mc-Al.
部门归属	[umoren, s. a.; li, y.; wang, f. h.] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. [umoren, s. a.] univ uyo, dept chem, fac sci, uyo, 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	Microcrystallization Aluminium Polyacrylic Acid Corrosion Inhibition Synergism Electrochemical Impedance Spectroscopy Microcrystalline Aluminum Hydrochloric-acid Carbon-steel Iodide-ions Behavior Iron Nanocrystallization Alloy Polarization
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/30714
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. A. Umoren,Y. Li,F. H. Wang. Effect of aluminium microstructure on corrosion and inhibiting effect of polyacrylic acid in H(2)SO(4) solution[J]. Journal of Applied Electrochemistry,2011,41(3):307-315.
APA	S. A. Umoren,Y. Li,&F. H. Wang.(2011).Effect of aluminium microstructure on corrosion and inhibiting effect of polyacrylic acid in H(2)SO(4) solution.Journal of Applied Electrochemistry,41(3),307-315.
MLA	S. A. Umoren,et al."Effect of aluminium microstructure on corrosion and inhibiting effect of polyacrylic acid in H(2)SO(4) solution".Journal of Applied Electrochemistry 41.3(2011):307-315.

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