The uneven corrosion of deep drawn coil-coatings investigated by EIS
The corrosion distribution along a coil-coating sample formed by deep-drawing is reported. The formed rectangular cup was divided in five different regions and their impedance response investigated independently. The response of each region was compared with the overall sample response and the morph...
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| Veröffentlicht in: | Electrochimica acta 2011-09, Vol.56 (23), p.7825-7832 |
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| container_title | Electrochimica acta |
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| creator | Bastos, A.C. Ferreira, M.G.S. Simões, A.M.P. |
| description | The corrosion distribution along a coil-coating sample formed by deep-drawing is reported. The formed rectangular cup was divided in five different regions and their impedance response investigated independently. The response of each region was compared with the overall sample response and the morphology of degradation was studied by scanning electron microscopy. Severe attack was observed in the most strained regions (corners and edges). Micro-defects in the shape of pinholes and cracks developed as a consequence of the forming process, apparently nucleating in the vicinity of the inorganic particles present in the paint. Immersion increased the size and number of defects. The overall impedance was reconstructed from the impedance measured in the local regions by two methods: (a) calculation using the local experimental data and (b) simulation using an equivalent electrical circuit with the values taken from the fitting of the local experimental data. |
| doi_str_mv | 10.1016/j.electacta.2010.12.023 |
| format | Article |
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The formed rectangular cup was divided in five different regions and their impedance response investigated independently. The response of each region was compared with the overall sample response and the morphology of degradation was studied by scanning electron microscopy. Severe attack was observed in the most strained regions (corners and edges). Micro-defects in the shape of pinholes and cracks developed as a consequence of the forming process, apparently nucleating in the vicinity of the inorganic particles present in the paint. Immersion increased the size and number of defects. The overall impedance was reconstructed from the impedance measured in the local regions by two methods: (a) calculation using the local experimental data and (b) simulation using an equivalent electrical circuit with the values taken from the fitting of the local experimental data.</description><identifier>ISSN: 0013-4686</identifier><identifier>EISSN: 1873-3859</identifier><identifier>DOI: 10.1016/j.electacta.2010.12.023</identifier><identifier>CODEN: ELCAAV</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Applied sciences ; Coil-coatings ; Coiling ; Corrosion ; Corrosion mechanisms ; Cupping test ; Deep drawing ; EIS ; Electric circuits ; Electrochemical impedance spectroscopy ; Exact sciences and technology ; Impedance ; Metals. 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The formed rectangular cup was divided in five different regions and their impedance response investigated independently. The response of each region was compared with the overall sample response and the morphology of degradation was studied by scanning electron microscopy. Severe attack was observed in the most strained regions (corners and edges). Micro-defects in the shape of pinholes and cracks developed as a consequence of the forming process, apparently nucleating in the vicinity of the inorganic particles present in the paint. Immersion increased the size and number of defects. The overall impedance was reconstructed from the impedance measured in the local regions by two methods: (a) calculation using the local experimental data and (b) simulation using an equivalent electrical circuit with the values taken from the fitting of the local experimental data.</description><subject>Applied sciences</subject><subject>Coil-coatings</subject><subject>Coiling</subject><subject>Corrosion</subject><subject>Corrosion mechanisms</subject><subject>Cupping test</subject><subject>Deep drawing</subject><subject>EIS</subject><subject>Electric circuits</subject><subject>Electrochemical impedance spectroscopy</subject><subject>Exact sciences and technology</subject><subject>Impedance</subject><subject>Metals. Metallurgy</subject><subject>Pinholes</subject><issn>0013-4686</issn><issn>1873-3859</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNqFUE1LAzEQDaJgrf4G9yKetk6STbI5Sv0EwYP1HNJktqasuzXZVvrvTWnpVRgYePPem5lHyDWFCQUq75YTbNENNteEwQ5lE2D8hIxorXjJa6FPyQiA8rKStTwnFyktAUBJBSPyMPvCYt3hBrvC9TH2KfRd0TeFR1wVPtrfHR7a0vV2CN0iFaHbYBrCwg7oi_m2eHz9uCRnjW0TXh36mHw-Pc6mL-Xb-_Pr9P6tdFypoZwLqXltqQAprKAwB1GhFcKiZ043XvA8l4prxyhXtpFYMVf5uQfta9DAx-R277uK_c86X2G-Q3LYtrbDfp2MZpLpWmWXMVF7pssfpYiNWcXwbePWUDC72MzSHGMzu9gMZSbHlpU3hx02Ods20XYupKOcVZJqBTLz7vc8zA9vAkaTXMDOoQ8x-xrfh393_QGEsoZN</recordid><startdate>20110930</startdate><enddate>20110930</enddate><creator>Bastos, A.C.</creator><creator>Ferreira, M.G.S.</creator><creator>Simões, A.M.P.</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SE</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20110930</creationdate><title>The uneven corrosion of deep drawn coil-coatings investigated by EIS</title><author>Bastos, A.C. ; Ferreira, M.G.S. ; Simões, A.M.P.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c377t-b56938a15065a510b054ea55aed2c9fd536936739c2137af6e42c4dbd09d80903</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Applied sciences</topic><topic>Coil-coatings</topic><topic>Coiling</topic><topic>Corrosion</topic><topic>Corrosion mechanisms</topic><topic>Cupping test</topic><topic>Deep drawing</topic><topic>EIS</topic><topic>Electric circuits</topic><topic>Electrochemical impedance spectroscopy</topic><topic>Exact sciences and technology</topic><topic>Impedance</topic><topic>Metals. Metallurgy</topic><topic>Pinholes</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bastos, A.C.</creatorcontrib><creatorcontrib>Ferreira, M.G.S.</creatorcontrib><creatorcontrib>Simões, A.M.P.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Corrosion Abstracts</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>Bastos, A.C.</au><au>Ferreira, M.G.S.</au><au>Simões, A.M.P.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The uneven corrosion of deep drawn coil-coatings investigated by EIS</atitle><jtitle>Electrochimica acta</jtitle><date>2011-09-30</date><risdate>2011</risdate><volume>56</volume><issue>23</issue><spage>7825</spage><epage>7832</epage><pages>7825-7832</pages><issn>0013-4686</issn><eissn>1873-3859</eissn><coden>ELCAAV</coden><abstract>The corrosion distribution along a coil-coating sample formed by deep-drawing is reported. The formed rectangular cup was divided in five different regions and their impedance response investigated independently. The response of each region was compared with the overall sample response and the morphology of degradation was studied by scanning electron microscopy. Severe attack was observed in the most strained regions (corners and edges). Micro-defects in the shape of pinholes and cracks developed as a consequence of the forming process, apparently nucleating in the vicinity of the inorganic particles present in the paint. Immersion increased the size and number of defects. 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| ispartof | Electrochimica acta, 2011-09, Vol.56 (23), p.7825-7832 |
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| source | Elsevier ScienceDirect Journals |
| subjects | Applied sciences Coil-coatings Coiling Corrosion Corrosion mechanisms Cupping test Deep drawing EIS Electric circuits Electrochemical impedance spectroscopy Exact sciences and technology Impedance Metals. Metallurgy Pinholes |
| title | The uneven corrosion of deep drawn coil-coatings investigated by EIS |
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