The inhibition effect of some pyrimidine derivatives on austenitic stainless steel in acidic media

被引：66

作者：

Caliskan, Necla ^{[1
]}

Akbas, Esvet ^{[1
]}

机构：

[1] Yuzuncu Yil Univ, Dept Chem, Fac Sci & Letters, TR-65080 Van, Turkey

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2011年 / 126卷 / 03期

关键词：

Corrosion; Austenitic stainless steel; Polarization; Pyrimidine derivatives; MILD-STEEL; CORROSION-INHIBITORS; HYDROCHLORIC-ACID; SCHIFF-BASES; CARBON-STEEL; BEHAVIOR; ADSORPTION; EFFICIENCY; IRON; IONS;

D O I：

10.1016/j.matchemphys.2010.11.051

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

5-Benzoyl-4-(substitutedphenyl)-6-phenyl-3,4-dihydropyrimidine-2(1H)-(thio)ones (DHPMs) (I and II) were synthesized using the Biginelli three component cyclocondensation reaction of an appropriate arylaldehyde, and (thio) urea. The effect of these corrosion inhibitors on the corrosion of austenitic stainless steel in 0.5M H2SO4 has been studied by electrochemical methods using Tafel plot, linear polarization and electrochemical impedance spectroscopy at 298K. The inhibition efficiencies obtained from all the methods employed are in good agreement. The adsorption of the DHPMs onto the stainless steel surface was found to follow Langmuir and Dubinin-Radushkevich adsorption isotherm models. Negative values of Delta G(ads) in the acidic media ensured the Spontaneity Of the adsorption process. Results show DHPM I to be the best inhibitor with a mean efficiency of 91% at 2 x 10(-3) M additive concentration. (c) 2010 Elsevier B.V. All rights reserved.

引用

页码：983 / 988

页数：6

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