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dc.creatorVračar, Ljubomir
dc.creatorDražić, Dragutin M.
dc.date.accessioned2021-01-19T14:25:26Z
dc.date.available2021-01-19T14:25:26Z
dc.date.issued2002
dc.identifier.issn0010-938X
dc.identifier.issn1879-0496
dc.identifier.urihttps://cer.ihtm.bg.ac.rs/handle/123456789/4090
dc.description.abstractAdsorption and corrosion inhibitive properties of three different organic molecules: 2-naphthalenesulfonic acid, 2,7-naphthalenedisulfonic acid and 2-naphthol-3,6-disulfonic acid are investigated on Armco-iron electrode cathodically polarized, in 0.5 mol dm -3 H 2 SO 4 solution. The examinations show that the three organic molecules behave as a cathodic corrosion inhibitors. The inhibitive efficiency, changes with the number of functional groups substituted on benzene ring and increases with concentration. The experimentally obtained adsorption isoterms follow the Frumkin equation [0/n(1-0) n ] exp(-2aθ) = Bc and the best fit is obtained for n = 2 (for 2-NSA) and n = 3 (for 2,7-NDSA and 2N-3,6-DSA). The calculated values for the parameter a are 2.1-2.9 and Gibbs energies are 17-21 kJ mol -1 . The adsorption rate constants are very small, proving that iron surface permanently changes due to the corrosion processes.sr
dc.language.isoensr
dc.publisherElseviersr
dc.rightsrestrictedAccesssr
dc.sourceCorrosion Sciencesr
dc.subjectCorrosion inhibitorsr
dc.subjectOrganic molecules adsorptionsr
dc.subjectCathodic protectionsr
dc.subjectIron electrodesr
dc.subjectFrumkin isothermsr
dc.titleAdsorption and corrosion inhibitive properties of some organic molecules on iron electrode in sulfuric acidsr
dc.typearticlesr
dc.rights.licenseARRsr
dcterms.abstractДражић, Драгутин М.; Врачар, Љубомир; Aдсорптион анд цорросион инхибитиве пропертиес оф соме органиц молецулес он ирон елецтроде ин сулфуриц ацид; Aдсорптион анд цорросион инхибитиве пропертиес оф соме органиц молецулес он ирон елецтроде ин сулфуриц ацид;
dc.citation.volume44
dc.citation.issue8
dc.citation.spage1669
dc.citation.epage1680
dc.citation.rankaM21
dc.identifier.doi10.1016/S0010-938X(01)00166-4
dc.identifier.scopus10.1016/S0010-938X(01)00166-4
dc.identifier.wos000175686400003
dc.type.versionpublishedVersionsr


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