Adsorption and corrosion inhibitive properties of some organic molecules on iron electrode in sulfuric acid
dc.creator | Vračar, Ljubomir | |
dc.creator | Dražić, Dragutin M. | |
dc.date.accessioned | 2021-01-19T14:25:26Z | |
dc.date.accessioned | 2023-01-13T12:51:03Z | |
dc.date.available | 2021-01-19T14:25:26Z | |
dc.date.available | 2023-01-13T12:51:03Z | |
dc.date.issued | 2002 | |
dc.identifier.issn | 0010-938X | |
dc.identifier.issn | 1879-0496 | |
dc.identifier.uri | http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5375 | |
dc.description.abstract | Adsorption 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.iso | en | sr |
dc.publisher | Elsevier | sr |
dc.rights | restrictedAccess | sr |
dc.source | Corrosion Science | sr |
dc.subject | Corrosion inhibitor | sr |
dc.subject | Organic molecules adsorption | sr |
dc.subject | Cathodic protection | sr |
dc.subject | Iron electrode | sr |
dc.subject | Frumkin isotherm | sr |
dc.title | Adsorption and corrosion inhibitive properties of some organic molecules on iron electrode in sulfuric acid | sr |
dc.type | article | sr |
dc.rights.license | ARR | sr |
dc.citation.epage | 1680 | |
dc.citation.issue | 8 | |
dc.citation.rank | aM21 | |
dc.citation.spage | 1669 | |
dc.citation.volume | 44 | |
dc.identifier.doi | 10.1016/S0010-938X(01)00166-4 | |
dc.identifier.scopus | 2-s2.0-0036681016 | |
dc.identifier.wos | 000175686400003 | |
dc.type.version | publishedVersion | sr |