Polyethylene glycol and polyvinyl alcohol as corrosion inhibitors for aluminium in acidic medium

被引：63
|
作者：
Umoren, S. A.
Ogbobe, O.
Okafor, P. C.
Ebenso, E. E.
机构：
[1] Univ Uyo, Dept Chem, Uyo, Nigeria
[2] Fed Univ Technol Owerri, Sch Engn & Engn Technol, Dept Polymer & Textile Engn, Owerri, Nigeria
[3] Univ Calabar, Dept Pure & Appl Chem, Phys Chem Unit, Calabar, Nigeria
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 2007年 / 105卷 / 06期
关键词：
corrosion inhibition; polyethylene glycolpolyvinyl alcohol; adsorption isotherms; aluminum;
D O I：
10.1002/app.26530
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The corrosion inhibition of aluminum in H2SO4 in the presence of polyethylene glycol (PEG) and polyvinyl alcohol (PVA) as inhibitors at 30-60 degrees C was studied using gravimetric, gasometric, and thermometric techniques. The inhibition efficiency (%I) increased with increase in concentration of the inhibitors. Increase in temperature increased the corrosion rate in the absence and presence of inhibitors but decreased the inhibition efficiency. Both PEG and PVA were found to obey Temkin adsorption isotherm at all concentrations and temperatures studied. Phenomenon of physical adsorption is proposed from the activation parameters obtained. Thermodynamic parameters reveal that the adsorption process is spontaneous. PEG was found to be a better inhibitor than PVA. (C) 2007 Wiley Periodicals, Inc.
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收藏
页码：3363 / 3370
页数：8
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