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Corrosion behaviour of CoCrMo implant alloy during fretting in bovine serum
CoCrMo alloys in dental skeletal structures and orthopaedic implants are susceptible to mechanical disruption of the passive film. To study this effect the open circuit potential (ocp) of CoCrMo alloy before, during and after mechanical disruption of the passive film in a tribo-electrochemical cell...
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Published in: | Corrosion science 2005-08, Vol.47 (8), p.1863-1875 |
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container_title | Corrosion science |
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creator | Contu, F. Elsener, B. Böhni, H. |
description | CoCrMo alloys in dental skeletal structures and orthopaedic implants are susceptible to mechanical disruption of the passive film. To study this effect the open circuit potential (ocp) of CoCrMo alloy before, during and after mechanical disruption of the passive film in a tribo-electrochemical cell is recorded in serum and inorganic buffered solutions at pH 4.0 and 7.0.
The ocp values achieved during rubbing (rubbing potentials) in serum are in agreement with a reaction mechanism whereby the anodic dissolution reaction involves the formation of the aqueous cations Co(II) and Cr(II) at acidic pHs and the oxides CoO and CrO at neutral and alkaline pHs. It is suggested that the kinetics describing the anodic dissolution reaction of the alloy in serum is under diffusion control, which is responsible for more positive rubbing potential values observed compared to inorganic solutions at the same pH.
The corrosion current of the alloy is significantly lower in serum both at pH 4.0 and 7.0. In addition, the biological electrolyte increases the repassivation rate at neutral pH. |
doi_str_mv | 10.1016/j.corsci.2004.09.003 |
format | article |
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The ocp values achieved during rubbing (rubbing potentials) in serum are in agreement with a reaction mechanism whereby the anodic dissolution reaction involves the formation of the aqueous cations Co(II) and Cr(II) at acidic pHs and the oxides CoO and CrO at neutral and alkaline pHs. It is suggested that the kinetics describing the anodic dissolution reaction of the alloy in serum is under diffusion control, which is responsible for more positive rubbing potential values observed compared to inorganic solutions at the same pH.
The corrosion current of the alloy is significantly lower in serum both at pH 4.0 and 7.0. In addition, the biological electrolyte increases the repassivation rate at neutral pH.</description><identifier>ISSN: 0010-938X</identifier><identifier>EISSN: 1879-0496</identifier><identifier>DOI: 10.1016/j.corsci.2004.09.003</identifier><identifier>CODEN: CRRSAA</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>Anodic and cathodic partial reactions ; Applied sciences ; Chromium ; Cobalt ; Corrosion ; Corrosion current ; Corrosion environments ; Corrosion mechanisms ; Exact sciences and technology ; Metals. Metallurgy ; Repassivation ; Serum</subject><ispartof>Corrosion science, 2005-08, Vol.47 (8), p.1863-1875</ispartof><rights>2004 Elsevier Ltd</rights><rights>2005 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c367t-700b169c9dfc70751dd030ef564f89e7278b6c31d903380bdc6e96f5def7bac23</citedby><cites>FETCH-LOGICAL-c367t-700b169c9dfc70751dd030ef564f89e7278b6c31d903380bdc6e96f5def7bac23</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=16921497$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Contu, F.</creatorcontrib><creatorcontrib>Elsener, B.</creatorcontrib><creatorcontrib>Böhni, H.</creatorcontrib><title>Corrosion behaviour of CoCrMo implant alloy during fretting in bovine serum</title><title>Corrosion science</title><description>CoCrMo alloys in dental skeletal structures and orthopaedic implants are susceptible to mechanical disruption of the passive film. To study this effect the open circuit potential (ocp) of CoCrMo alloy before, during and after mechanical disruption of the passive film in a tribo-electrochemical cell is recorded in serum and inorganic buffered solutions at pH 4.0 and 7.0.
The ocp values achieved during rubbing (rubbing potentials) in serum are in agreement with a reaction mechanism whereby the anodic dissolution reaction involves the formation of the aqueous cations Co(II) and Cr(II) at acidic pHs and the oxides CoO and CrO at neutral and alkaline pHs. It is suggested that the kinetics describing the anodic dissolution reaction of the alloy in serum is under diffusion control, which is responsible for more positive rubbing potential values observed compared to inorganic solutions at the same pH.
The corrosion current of the alloy is significantly lower in serum both at pH 4.0 and 7.0. In addition, the biological electrolyte increases the repassivation rate at neutral pH.</description><subject>Anodic and cathodic partial reactions</subject><subject>Applied sciences</subject><subject>Chromium</subject><subject>Cobalt</subject><subject>Corrosion</subject><subject>Corrosion current</subject><subject>Corrosion environments</subject><subject>Corrosion mechanisms</subject><subject>Exact sciences and technology</subject><subject>Metals. Metallurgy</subject><subject>Repassivation</subject><subject>Serum</subject><issn>0010-938X</issn><issn>1879-0496</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><recordid>eNp9kE9LxDAQxYMouK5-Aw-96K110naT5iJI8R8qXhS8hTSZaJZusybtgt_eLLvgzdMMw--9mXmEnFMoKFB2tSy0D1G7ogSoCxAFQHVAZrThIodasEMyA6CQi6r5OCYnMS4BoEyTGXlqfQg-Oj9kHX6pjfNTyLzNWt-GF5-51bpXw5ipvvc_mZmCGz4zG3Act41LIr9xA2YRw7Q6JUdW9RHP9nVO3u9u39qH_Pn1_rG9ec51xfiYc4COMqGFsZoDX1BjoAK0C1bbRiAvedMxXVEjoKoa6IxmKJhdGLS8U7qs5uRy57sO_nvCOMqVixr7dCn6KcqyWQBvaprAegfq9GIMaOU6uJUKP5KC3CYnl3KXnNwmJ0HIlFySXez9VdSqt0EN2sU_LRMlrQVP3PWOw_TsxmGQyQkHjcYF1KM03v2_6BeHF4ar</recordid><startdate>20050801</startdate><enddate>20050801</enddate><creator>Contu, F.</creator><creator>Elsener, B.</creator><creator>Böhni, H.</creator><general>Elsevier Ltd</general><general>Elsevier Science</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SE</scope><scope>7TB</scope><scope>8BQ</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>JG9</scope></search><sort><creationdate>20050801</creationdate><title>Corrosion behaviour of CoCrMo implant alloy during fretting in bovine serum</title><author>Contu, F. ; Elsener, B. ; Böhni, H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c367t-700b169c9dfc70751dd030ef564f89e7278b6c31d903380bdc6e96f5def7bac23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2005</creationdate><topic>Anodic and cathodic partial reactions</topic><topic>Applied sciences</topic><topic>Chromium</topic><topic>Cobalt</topic><topic>Corrosion</topic><topic>Corrosion current</topic><topic>Corrosion environments</topic><topic>Corrosion mechanisms</topic><topic>Exact sciences and technology</topic><topic>Metals. Metallurgy</topic><topic>Repassivation</topic><topic>Serum</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Contu, F.</creatorcontrib><creatorcontrib>Elsener, B.</creatorcontrib><creatorcontrib>Böhni, H.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Corrosion Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><jtitle>Corrosion science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Contu, F.</au><au>Elsener, B.</au><au>Böhni, H.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Corrosion behaviour of CoCrMo implant alloy during fretting in bovine serum</atitle><jtitle>Corrosion science</jtitle><date>2005-08-01</date><risdate>2005</risdate><volume>47</volume><issue>8</issue><spage>1863</spage><epage>1875</epage><pages>1863-1875</pages><issn>0010-938X</issn><eissn>1879-0496</eissn><coden>CRRSAA</coden><abstract>CoCrMo alloys in dental skeletal structures and orthopaedic implants are susceptible to mechanical disruption of the passive film. To study this effect the open circuit potential (ocp) of CoCrMo alloy before, during and after mechanical disruption of the passive film in a tribo-electrochemical cell is recorded in serum and inorganic buffered solutions at pH 4.0 and 7.0.
The ocp values achieved during rubbing (rubbing potentials) in serum are in agreement with a reaction mechanism whereby the anodic dissolution reaction involves the formation of the aqueous cations Co(II) and Cr(II) at acidic pHs and the oxides CoO and CrO at neutral and alkaline pHs. It is suggested that the kinetics describing the anodic dissolution reaction of the alloy in serum is under diffusion control, which is responsible for more positive rubbing potential values observed compared to inorganic solutions at the same pH.
The corrosion current of the alloy is significantly lower in serum both at pH 4.0 and 7.0. In addition, the biological electrolyte increases the repassivation rate at neutral pH.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.corsci.2004.09.003</doi><tpages>13</tpages></addata></record> |
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source | Elsevier |
subjects | Anodic and cathodic partial reactions Applied sciences Chromium Cobalt Corrosion Corrosion current Corrosion environments Corrosion mechanisms Exact sciences and technology Metals. Metallurgy Repassivation Serum |
title | Corrosion behaviour of CoCrMo implant alloy during fretting in bovine serum |
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