The inhibition of mild steel corrosion in hydrochloric acid by 2,2'-pyridil and alpha-pyridoin

被引：29
作者：
Ita, BI
Offiong, OE
机构：
[1] Phys. and Inorg. Chem. Laboratory, Chemistry Department, University of Calabar, Calabar, Cross River State
来源：
MATERIALS CHEMISTRY AND PHYSICS | 1997年 / 51卷 / 03期
关键词：
corrosion; mild steel; pyridil; pyridoin; Freundlich isotherm;
D O I：
10.1016/S0254-0584(97)80308-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of closely related alpha-pyridoin and 2,2'-pyridil on the corrosion behaviour of mild steel in hydrochloric acid solution has been studied. Weight loss and hydrogen evolution measurements reveal that alpha-pyridoin gives a better inhibition effect than 2,2'-pyridil. The inhibition effect is more pronounced with increasing temperature as well as inhibitor concentration. Chemical adsorption mechanism has been proposed for the two inhibitors. alpha-Pyridoin and 2,2'-pyridil obey the Freundlich adsorption isotherm equation at all concentrations and temperatures. The higher efficiencies of the alpha-pyridoin have been explained in terms of high solubility of the compound facilitated by hydrogen bonding with solvent molecules. alpha-Pyridoin is also considered to form a more stable bond with mild steel. (C) 1997 Elsevier Science S.A.
引用
收藏
页码：203 / 210
页数：8
相关论文
共 10 条
[1]   INHIBITORY-ACTION OF METHYL AND PHENYL THIOSEMICARBAZONE DERIVATIVES ON THE CORROSION OF MILD-STEEL IN HYDROCHLORIC-ACID [J].
EKPE, UJ ;
IBOK, UJ ;
ITA, BI ;
OFFIONG, OE ;
EBENSO, EE .
MATERIALS CHEMISTRY AND PHYSICS, 1995, 40 (02) :87-93
[2]   STUDY OF THE INHIBITORY-ACTION OF NITROGEN-CONTAINING COMPOUNDS [J].
GRANESE, SL .
CORROSION, 1988, 44 (06) :322-327
[3]  
GROSS JM, 1972, PRINCIPLES PHYSICAL
[4]  
GURMEET S, 1984, T SOC ADV ELECT SCI, V19, P106
[5]   ACTION OF POLAR ORGANIC INHIBITORS IN ACID DISSOLUTION OF METALS [J].
HACKERMAN, N ;
MAKRIDES, AC .
INDUSTRIAL AND ENGINEERING CHEMISTRY, 1954, 46 (03) :523-527
[6]  
Ibok U.J., 1993, TROP J APPL SCI, V3, P54
[7]   INHIBITION OF ACID DISSOLUTION OF METALS .1. SOME GENERAL OBSERVATIONS [J].
MAKRIDES, AC ;
HACKERMAN, N .
JOURNAL OF PHYSICAL CHEMISTRY, 1955, 59 (08) :707-710
[8]   THE INHIBITION OF THE CORROSION OF MILD-STEEL IN AQUEOUS ACIDS BY INSITU POLYMERIZATION OF UNSATURATED-COMPOUNDS [J].
MENGOLI, G ;
MUSIANI, MM ;
PAGURA, C ;
PAOLUCCI, F .
CORROSION SCIENCE, 1991, 32 (07) :743-753
[9]  
National Association of Corrosion Engineers, 1984, CORR BAS INTR
[10]  
TALATI JD, 1986, T SAEST, V11, P259
1