A model for surface charge-assisted barrier film growth on metals in acidic solutions based on ac impedance measurements
A kinetic model of the passivation of metals via formation of a dual layer comprising a barrier film and a salt overlayer is proposed. It is assumed that the barrier film grows through high field-assisted migration of defects. Ionic surface charges are formed both at the metal/barrier film and barri...
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| Veröffentlicht in: | Electrochimica acta 1996-01, Vol.41 (17), p.2695-2705 |
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| container_end_page | 2705 |
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| container_issue | 17 |
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| container_title | Electrochimica acta |
| container_volume | 41 |
| creator | Bojinov, M. Kanazirski, I. Girginov, A. |
| description | A kinetic model of the passivation of metals
via formation of a dual layer comprising a barrier film and a salt overlayer is proposed. It is assumed that the barrier film grows through high field-assisted migration of defects. Ionic surface charges are formed both at the metal/barrier film and barrier film/ electrolyte interfaces. These charges can either enhance or retard the transport of defects during film growth resulting in the observation of a pseudoinductive or capacitive time constant in the impedance spectra. The dissolution of the barrier film at its interface with the electrolyte is assumed independent on the electrode potential. The model is able to reproduce the overall
ac impedance response of several metals in their region of passivity. This response is a sum of the impedances of the barrier film/electrolyte interface, and the one of the barrier film itself.
As representative systems, passive Bi and Sb in suphuric acid solutions are discussed. The main kinetic and structural characteristics of the metal/barrier film/electrolyte system are determined and some limitations of the model are outlined. |
| doi_str_mv | 10.1016/0013-4686(96)00124-7 |
| format | Article |
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via formation of a dual layer comprising a barrier film and a salt overlayer is proposed. It is assumed that the barrier film grows through high field-assisted migration of defects. Ionic surface charges are formed both at the metal/barrier film and barrier film/ electrolyte interfaces. These charges can either enhance or retard the transport of defects during film growth resulting in the observation of a pseudoinductive or capacitive time constant in the impedance spectra. The dissolution of the barrier film at its interface with the electrolyte is assumed independent on the electrode potential. The model is able to reproduce the overall
ac impedance response of several metals in their region of passivity. This response is a sum of the impedances of the barrier film/electrolyte interface, and the one of the barrier film itself.
As representative systems, passive Bi and Sb in suphuric acid solutions are discussed. The main kinetic and structural characteristics of the metal/barrier film/electrolyte system are determined and some limitations of the model are outlined.</description><identifier>ISSN: 0013-4686</identifier><identifier>EISSN: 1873-3859</identifier><identifier>DOI: 10.1016/0013-4686(96)00124-7</identifier><identifier>CODEN: ELCAAV</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>ac impedance ; Applied sciences ; barrier film ; Chemistry ; Corrosion ; Corrosion mechanisms ; Electrochemistry ; Electrodes: preparations and properties ; Exact sciences and technology ; General and physical chemistry ; kinetic model ; Metals. Metallurgy ; Other electrodes ; passivity ; surface charge</subject><ispartof>Electrochimica acta, 1996-01, Vol.41 (17), p.2695-2705</ispartof><rights>1996</rights><rights>1996 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c364t-ac26c309a2f7c5b93c14c6cb36e2e5f77a81fadb9c1c568a9dec532eaa1f9fe33</citedby><cites>FETCH-LOGICAL-c364t-ac26c309a2f7c5b93c14c6cb36e2e5f77a81fadb9c1c568a9dec532eaa1f9fe33</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/0013-4686(96)00124-7$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=3178156$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Bojinov, M.</creatorcontrib><creatorcontrib>Kanazirski, I.</creatorcontrib><creatorcontrib>Girginov, A.</creatorcontrib><title>A model for surface charge-assisted barrier film growth on metals in acidic solutions based on ac impedance measurements</title><title>Electrochimica acta</title><description>A kinetic model of the passivation of metals
via formation of a dual layer comprising a barrier film and a salt overlayer is proposed. It is assumed that the barrier film grows through high field-assisted migration of defects. Ionic surface charges are formed both at the metal/barrier film and barrier film/ electrolyte interfaces. These charges can either enhance or retard the transport of defects during film growth resulting in the observation of a pseudoinductive or capacitive time constant in the impedance spectra. The dissolution of the barrier film at its interface with the electrolyte is assumed independent on the electrode potential. The model is able to reproduce the overall
ac impedance response of several metals in their region of passivity. This response is a sum of the impedances of the barrier film/electrolyte interface, and the one of the barrier film itself.
As representative systems, passive Bi and Sb in suphuric acid solutions are discussed. The main kinetic and structural characteristics of the metal/barrier film/electrolyte system are determined and some limitations of the model are outlined.</description><subject>ac impedance</subject><subject>Applied sciences</subject><subject>barrier film</subject><subject>Chemistry</subject><subject>Corrosion</subject><subject>Corrosion mechanisms</subject><subject>Electrochemistry</subject><subject>Electrodes: preparations and properties</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>kinetic model</subject><subject>Metals. Metallurgy</subject><subject>Other electrodes</subject><subject>passivity</subject><subject>surface charge</subject><issn>0013-4686</issn><issn>1873-3859</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1996</creationdate><recordtype>article</recordtype><recordid>eNp9kE2LFDEQhoMoOK7-Aw85iOihNR_dSeciLItfsOBFz6GmurIb6e6MqR4__r0ZZ9mjp1Dked-iHiGea_VGK-3eKqVt17vRvQrudRtM3_kHYqdHbzs7DuGh2N0jj8UT5u9KKe-82onfl3IpE80ylSr5WBMgSbyFekMdMGfeaJJ7qDVTlSnPi7yp5dd2K8sqF9pgZplXCZinjJLLfNxyWbkluOXK6Ufm5UATrK13IWgraKF146fiUWppenb3XohvH95_vfrUXX_5-Pnq8rpD6_qtAzQOrQpgksdhHyzqHh3urSNDQ_IeRp1g2gfUOLgRwkQ4WEMAOoVE1l6Il-feQy0_jsRbXDIjzTOsVI4cjTO98iY0sD-DWAtzpRQPNS9Q_0St4klzPDmMJ4cx_BtMH32LvbjrB0aYU22XZr7PWu1HPbiGvTtj1G792WRGxkxNypQr4Rankv-_5y-2upOP</recordid><startdate>19960101</startdate><enddate>19960101</enddate><creator>Bojinov, M.</creator><creator>Kanazirski, I.</creator><creator>Girginov, A.</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>19960101</creationdate><title>A model for surface charge-assisted barrier film growth on metals in acidic solutions based on ac impedance measurements</title><author>Bojinov, M. ; Kanazirski, I. ; Girginov, A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c364t-ac26c309a2f7c5b93c14c6cb36e2e5f77a81fadb9c1c568a9dec532eaa1f9fe33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1996</creationdate><topic>ac impedance</topic><topic>Applied sciences</topic><topic>barrier film</topic><topic>Chemistry</topic><topic>Corrosion</topic><topic>Corrosion mechanisms</topic><topic>Electrochemistry</topic><topic>Electrodes: preparations and properties</topic><topic>Exact sciences and technology</topic><topic>General and physical chemistry</topic><topic>kinetic model</topic><topic>Metals. Metallurgy</topic><topic>Other electrodes</topic><topic>passivity</topic><topic>surface charge</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bojinov, M.</creatorcontrib><creatorcontrib>Kanazirski, I.</creatorcontrib><creatorcontrib>Girginov, A.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Electrochimica acta</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Bojinov, M.</au><au>Kanazirski, I.</au><au>Girginov, A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A model for surface charge-assisted barrier film growth on metals in acidic solutions based on ac impedance measurements</atitle><jtitle>Electrochimica acta</jtitle><date>1996-01-01</date><risdate>1996</risdate><volume>41</volume><issue>17</issue><spage>2695</spage><epage>2705</epage><pages>2695-2705</pages><issn>0013-4686</issn><eissn>1873-3859</eissn><coden>ELCAAV</coden><abstract>A kinetic model of the passivation of metals
via formation of a dual layer comprising a barrier film and a salt overlayer is proposed. It is assumed that the barrier film grows through high field-assisted migration of defects. Ionic surface charges are formed both at the metal/barrier film and barrier film/ electrolyte interfaces. These charges can either enhance or retard the transport of defects during film growth resulting in the observation of a pseudoinductive or capacitive time constant in the impedance spectra. The dissolution of the barrier film at its interface with the electrolyte is assumed independent on the electrode potential. The model is able to reproduce the overall
ac impedance response of several metals in their region of passivity. This response is a sum of the impedances of the barrier film/electrolyte interface, and the one of the barrier film itself.
As representative systems, passive Bi and Sb in suphuric acid solutions are discussed. The main kinetic and structural characteristics of the metal/barrier film/electrolyte system are determined and some limitations of the model are outlined.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><doi>10.1016/0013-4686(96)00124-7</doi><tpages>11</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0013-4686 |
| ispartof | Electrochimica acta, 1996-01, Vol.41 (17), p.2695-2705 |
| issn | 0013-4686 1873-3859 |
| language | eng |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | ac impedance Applied sciences barrier film Chemistry Corrosion Corrosion mechanisms Electrochemistry Electrodes: preparations and properties Exact sciences and technology General and physical chemistry kinetic model Metals. Metallurgy Other electrodes passivity surface charge |
| title | A model for surface charge-assisted barrier film growth on metals in acidic solutions based on ac impedance measurements |
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