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Thermogalvanic Currents in Steel Reinforced Concrete
[Display omitted] •Temperature gradients generate galvanic currents, due to changes in cement chemistry and passive layer.•30°C is the critical temperature for switching polarity of galvanic couples between steel rebars.•In NaOH solution carbon steel behaves cathodically with respect to stainless st...
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| Published in: | Electrochimica acta 2016-06, Vol.202, p.269-276 |
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| Main Authors: | , , , , |
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| Language: | English |
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| cited_by | cdi_FETCH-LOGICAL-c385t-539508af935fe0c53ea13e345c06412fbb6d5829d396b4666e139babb5bf4dc93 |
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| cites | cdi_FETCH-LOGICAL-c385t-539508af935fe0c53ea13e345c06412fbb6d5829d396b4666e139babb5bf4dc93 |
| container_end_page | 276 |
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| container_start_page | 269 |
| container_title | Electrochimica acta |
| container_volume | 202 |
| creator | Nóvoa, X.R. Pérez, C. Reyes, A. Soage, A. Vázquez, A. |
| description | [Display omitted]
•Temperature gradients generate galvanic currents, due to changes in cement chemistry and passive layer.•30°C is the critical temperature for switching polarity of galvanic couples between steel rebars.•In NaOH solution carbon steel behaves cathodically with respect to stainless steel for T |
| doi_str_mv | 10.1016/j.electacta.2015.11.138 |
| format | article |
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•Temperature gradients generate galvanic currents, due to changes in cement chemistry and passive layer.•30°C is the critical temperature for switching polarity of galvanic couples between steel rebars.•In NaOH solution carbon steel behaves cathodically with respect to stainless steel for T<30°C.•Temperature gradients enhance galvanic coupling in rebar’s corrosion.
The thermogalvanic currents between nominally identical segments in a reinforced concrete beam were investigated. Temperature gradients induce galvanic currents that exhibit a 30°C critical point. The character of the hot electrode side changes from anodic to cathodic when the temperature rises above that pivot point. Parallel tests performed in solution using carbon steel-stainless steel galvanic couples also revealed that 30°C is a critical temperature. In NaOH solution the carbon steel behaves cathodically with respect to stainless steel but only for T<30°C. In Ca(OH)2 solution containing chlorides the carbon steel consistently behaves anodically while the degree of thermogalvanic current exhibits a pronounced temperature dependence.</description><identifier>ISSN: 0013-4686</identifier><identifier>EISSN: 1873-3859</identifier><identifier>DOI: 10.1016/j.electacta.2015.11.138</identifier><language>eng</language><publisher>Elsevier Ltd</publisher><subject>Anodic ; Carbon ; Carbon steels ; corrosion in concrete ; Electrodes ; galvanic coupling ; Reinforced concrete ; Reinforcing steels ; Segments ; steel reinforcements ; Steels ; temperature gradients</subject><ispartof>Electrochimica acta, 2016-06, Vol.202, p.269-276</ispartof><rights>2015 Elsevier Ltd</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c385t-539508af935fe0c53ea13e345c06412fbb6d5829d396b4666e139babb5bf4dc93</citedby><cites>FETCH-LOGICAL-c385t-539508af935fe0c53ea13e345c06412fbb6d5829d396b4666e139babb5bf4dc93</cites><orcidid>0000-0001-9240-4923 ; 0000-0003-2968-0153 ; 0000-0001-7051-5294</orcidid></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></links><search><creatorcontrib>Nóvoa, X.R.</creatorcontrib><creatorcontrib>Pérez, C.</creatorcontrib><creatorcontrib>Reyes, A.</creatorcontrib><creatorcontrib>Soage, A.</creatorcontrib><creatorcontrib>Vázquez, A.</creatorcontrib><title>Thermogalvanic Currents in Steel Reinforced Concrete</title><title>Electrochimica acta</title><description>[Display omitted]
•Temperature gradients generate galvanic currents, due to changes in cement chemistry and passive layer.•30°C is the critical temperature for switching polarity of galvanic couples between steel rebars.•In NaOH solution carbon steel behaves cathodically with respect to stainless steel for T<30°C.•Temperature gradients enhance galvanic coupling in rebar’s corrosion.
The thermogalvanic currents between nominally identical segments in a reinforced concrete beam were investigated. Temperature gradients induce galvanic currents that exhibit a 30°C critical point. The character of the hot electrode side changes from anodic to cathodic when the temperature rises above that pivot point. Parallel tests performed in solution using carbon steel-stainless steel galvanic couples also revealed that 30°C is a critical temperature. In NaOH solution the carbon steel behaves cathodically with respect to stainless steel but only for T<30°C. In Ca(OH)2 solution containing chlorides the carbon steel consistently behaves anodically while the degree of thermogalvanic current exhibits a pronounced temperature dependence.</description><subject>Anodic</subject><subject>Carbon</subject><subject>Carbon steels</subject><subject>corrosion in concrete</subject><subject>Electrodes</subject><subject>galvanic coupling</subject><subject>Reinforced concrete</subject><subject>Reinforcing steels</subject><subject>Segments</subject><subject>steel reinforcements</subject><subject>Steels</subject><subject>temperature gradients</subject><issn>0013-4686</issn><issn>1873-3859</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqFkF9LwzAUxYMoOKefwT760prb_GnyOIo6YSDofA5peqsZXTuTbuC3N2Piq3DhvJxzLudHyC3QAijI-02BPbrJpitKCqIAKICpMzIDVbGcKaHPyYxSYDmXSl6Sqxg3lNJKVnRG-PoTw3b8sP3BDt5l9T4EHKaY-SF7mxD77BX90I3BYZvV4-ACTnhNLjrbR7z51Tl5f3xY18t89fL0XC9WuUtfp1wwLaiynWaiQ-oEQwsMGReOSg5l1zSyFarULdOy4VJKBKYb2zSi6XjrNJuTu1PvLoxfe4yT2frosO_tgOM-GlCl4LxkWiVrdbK6MMYYsDO74Lc2fBug5sjJbMwfJ3PkZABM4pSSi1MS05KDx2Ci8zikvT4kv2lH_2_HD0WydOc</recordid><startdate>20160601</startdate><enddate>20160601</enddate><creator>Nóvoa, X.R.</creator><creator>Pérez, C.</creator><creator>Reyes, A.</creator><creator>Soage, A.</creator><creator>Vázquez, A.</creator><general>Elsevier Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0001-9240-4923</orcidid><orcidid>https://orcid.org/0000-0003-2968-0153</orcidid><orcidid>https://orcid.org/0000-0001-7051-5294</orcidid></search><sort><creationdate>20160601</creationdate><title>Thermogalvanic Currents in Steel Reinforced Concrete</title><author>Nóvoa, X.R. ; Pérez, C. ; Reyes, A. ; Soage, A. ; Vázquez, A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c385t-539508af935fe0c53ea13e345c06412fbb6d5829d396b4666e139babb5bf4dc93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Anodic</topic><topic>Carbon</topic><topic>Carbon steels</topic><topic>corrosion in concrete</topic><topic>Electrodes</topic><topic>galvanic coupling</topic><topic>Reinforced concrete</topic><topic>Reinforcing steels</topic><topic>Segments</topic><topic>steel reinforcements</topic><topic>Steels</topic><topic>temperature gradients</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Nóvoa, X.R.</creatorcontrib><creatorcontrib>Pérez, C.</creatorcontrib><creatorcontrib>Reyes, A.</creatorcontrib><creatorcontrib>Soage, A.</creatorcontrib><creatorcontrib>Vázquez, A.</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Electrochimica acta</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Nóvoa, X.R.</au><au>Pérez, C.</au><au>Reyes, A.</au><au>Soage, A.</au><au>Vázquez, A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Thermogalvanic Currents in Steel Reinforced Concrete</atitle><jtitle>Electrochimica acta</jtitle><date>2016-06-01</date><risdate>2016</risdate><volume>202</volume><spage>269</spage><epage>276</epage><pages>269-276</pages><issn>0013-4686</issn><eissn>1873-3859</eissn><abstract>[Display omitted]
•Temperature gradients generate galvanic currents, due to changes in cement chemistry and passive layer.•30°C is the critical temperature for switching polarity of galvanic couples between steel rebars.•In NaOH solution carbon steel behaves cathodically with respect to stainless steel for T<30°C.•Temperature gradients enhance galvanic coupling in rebar’s corrosion.
The thermogalvanic currents between nominally identical segments in a reinforced concrete beam were investigated. Temperature gradients induce galvanic currents that exhibit a 30°C critical point. The character of the hot electrode side changes from anodic to cathodic when the temperature rises above that pivot point. Parallel tests performed in solution using carbon steel-stainless steel galvanic couples also revealed that 30°C is a critical temperature. In NaOH solution the carbon steel behaves cathodically with respect to stainless steel but only for T<30°C. In Ca(OH)2 solution containing chlorides the carbon steel consistently behaves anodically while the degree of thermogalvanic current exhibits a pronounced temperature dependence.</abstract><pub>Elsevier Ltd</pub><doi>10.1016/j.electacta.2015.11.138</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0001-9240-4923</orcidid><orcidid>https://orcid.org/0000-0003-2968-0153</orcidid><orcidid>https://orcid.org/0000-0001-7051-5294</orcidid></addata></record> |
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| language | eng |
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| source | ScienceDirect Freedom Collection |
| subjects | Anodic Carbon Carbon steels corrosion in concrete Electrodes galvanic coupling Reinforced concrete Reinforcing steels Segments steel reinforcements Steels temperature gradients |
| title | Thermogalvanic Currents in Steel Reinforced Concrete |
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