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Molybdate-phosphate conversion coatings to protect steel in a simulated concrete pore solution
For the corrosion protection of steel rebars in concrete, five different molybdate-phosphate conversion coatings were prepared, by changing the molybdate-phosphate ratio in the conversion baths. Their composition and morphology were studied with GD-OES, XPS, Raman spectroscopy and SEM-EDX and a sche...
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| Published in: | Surface & coatings technology 2019-03, Vol.361, p.280-291 |
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| Main Authors: | , , , |
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| Language: | English |
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| cites | cdi_FETCH-LOGICAL-c340t-ed96434a03113aa6d5841b1dc9bf7f235874542af9fbd27f4fec707efb86843b3 |
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| container_start_page | 280 |
| container_title | Surface & coatings technology |
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| creator | Verbruggen, Hilke Baert, Kitty Terryn, Herman De Graeve, Iris |
| description | For the corrosion protection of steel rebars in concrete, five different molybdate-phosphate conversion coatings were prepared, by changing the molybdate-phosphate ratio in the conversion baths. Their composition and morphology were studied with GD-OES, XPS, Raman spectroscopy and SEM-EDX and a schematic representation of their structure is suggested. Further, the corrosion resistance properties of the coatings were evaluated in a simulated concrete pore solution (CPS) containing chlorides, using anodic polarization measurements. Thanks to the elaborated surface analysis their corrosion behaviour could be correlated to their structure.
The results show that by altering the molybdate-phosphate ratio the structure and, consequently, the corrosion protection properties change significantly. By optimizing this ratio a twofold protection mechanism could be attained, demonstrating both good barrier properties and consistent with active corrosion protection.
[Display omitted]
•Five different molybdate-phosphate conversion coatings were prepared by varying the concentration of molybdate and phosphate in the conversion bath•Elaborated surface analysis study to explain electrochemical behaviour•By fine-tuning the molybdate/phosphate balance, one can achieve two-fold protection mechanism: a physical barrier combined with active corrosion protection |
| doi_str_mv | 10.1016/j.surfcoat.2018.09.056 |
| format | article |
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The results show that by altering the molybdate-phosphate ratio the structure and, consequently, the corrosion protection properties change significantly. By optimizing this ratio a twofold protection mechanism could be attained, demonstrating both good barrier properties and consistent with active corrosion protection.
[Display omitted]
•Five different molybdate-phosphate conversion coatings were prepared by varying the concentration of molybdate and phosphate in the conversion bath•Elaborated surface analysis study to explain electrochemical behaviour•By fine-tuning the molybdate/phosphate balance, one can achieve two-fold protection mechanism: a physical barrier combined with active corrosion protection</description><identifier>ISSN: 0257-8972</identifier><identifier>EISSN: 1879-3347</identifier><identifier>DOI: 10.1016/j.surfcoat.2018.09.056</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Anodic polarization ; Concrete ; Conversion coating ; Conversion coatings ; Corrosion ; Corrosion prevention ; Corrosion resistance ; Corrosion resistant steels ; Molybdate ; Morphology ; Phosphate ; Pore solution ; Properties (attributes) ; Protective coatings ; Raman spectroscopy ; Steel ; Surface analysis (chemical) ; X ray photoelectron spectroscopy</subject><ispartof>Surface & coatings technology, 2019-03, Vol.361, p.280-291</ispartof><rights>2018</rights><rights>Copyright Elsevier BV Mar 15, 2019</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c340t-ed96434a03113aa6d5841b1dc9bf7f235874542af9fbd27f4fec707efb86843b3</citedby><cites>FETCH-LOGICAL-c340t-ed96434a03113aa6d5841b1dc9bf7f235874542af9fbd27f4fec707efb86843b3</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></links><search><creatorcontrib>Verbruggen, Hilke</creatorcontrib><creatorcontrib>Baert, Kitty</creatorcontrib><creatorcontrib>Terryn, Herman</creatorcontrib><creatorcontrib>De Graeve, Iris</creatorcontrib><title>Molybdate-phosphate conversion coatings to protect steel in a simulated concrete pore solution</title><title>Surface & coatings technology</title><description>For the corrosion protection of steel rebars in concrete, five different molybdate-phosphate conversion coatings were prepared, by changing the molybdate-phosphate ratio in the conversion baths. Their composition and morphology were studied with GD-OES, XPS, Raman spectroscopy and SEM-EDX and a schematic representation of their structure is suggested. Further, the corrosion resistance properties of the coatings were evaluated in a simulated concrete pore solution (CPS) containing chlorides, using anodic polarization measurements. Thanks to the elaborated surface analysis their corrosion behaviour could be correlated to their structure.
The results show that by altering the molybdate-phosphate ratio the structure and, consequently, the corrosion protection properties change significantly. By optimizing this ratio a twofold protection mechanism could be attained, demonstrating both good barrier properties and consistent with active corrosion protection.
[Display omitted]
•Five different molybdate-phosphate conversion coatings were prepared by varying the concentration of molybdate and phosphate in the conversion bath•Elaborated surface analysis study to explain electrochemical behaviour•By fine-tuning the molybdate/phosphate balance, one can achieve two-fold protection mechanism: a physical barrier combined with active corrosion protection</description><subject>Anodic polarization</subject><subject>Concrete</subject><subject>Conversion coating</subject><subject>Conversion coatings</subject><subject>Corrosion</subject><subject>Corrosion prevention</subject><subject>Corrosion resistance</subject><subject>Corrosion resistant steels</subject><subject>Molybdate</subject><subject>Morphology</subject><subject>Phosphate</subject><subject>Pore solution</subject><subject>Properties (attributes)</subject><subject>Protective coatings</subject><subject>Raman spectroscopy</subject><subject>Steel</subject><subject>Surface analysis (chemical)</subject><subject>X ray photoelectron spectroscopy</subject><issn>0257-8972</issn><issn>1879-3347</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNqFkE1LxDAQhoMouK7-BQl4bs1Xm_amLH7Bihe9GtJ04mbpNjVJBf-9WVbPnmYO87wz8yB0SUlJCa2vt2WcgzVep5IR2pSkLUlVH6EFbWRbcC7kMVoQVsmiaSU7RWcxbgkhVLZigd6f_fDd9TpBMW18nDa5w8aPXxCi8yPex7rxI-Lk8RR8ApNwTAADdiPWOLrdPGSk3zMmQIYnHwBHP8wp8-foxOohwsVvXaK3-7vX1WOxfnl4Wt2uC8MFSQX0bS240IRTyrWu-6oRtKO9aTsrLeNVI0UlmLat7XomrbBgJJFgu6ZuBO_4El0dcvONnzPEpLZ-DmNeqRjLqYSyuspT9WHKBB9jAKum4HY6fCtK1N6l2qo_l2rvUpFWZZcZvDmAkH_4chBUNA5GA70L2Yjqvfsv4gcfyoLu</recordid><startdate>20190315</startdate><enddate>20190315</enddate><creator>Verbruggen, Hilke</creator><creator>Baert, Kitty</creator><creator>Terryn, Herman</creator><creator>De Graeve, Iris</creator><general>Elsevier B.V</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20190315</creationdate><title>Molybdate-phosphate conversion coatings to protect steel in a simulated concrete pore solution</title><author>Verbruggen, Hilke ; Baert, Kitty ; Terryn, Herman ; De Graeve, Iris</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c340t-ed96434a03113aa6d5841b1dc9bf7f235874542af9fbd27f4fec707efb86843b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Anodic polarization</topic><topic>Concrete</topic><topic>Conversion coating</topic><topic>Conversion coatings</topic><topic>Corrosion</topic><topic>Corrosion prevention</topic><topic>Corrosion resistance</topic><topic>Corrosion resistant steels</topic><topic>Molybdate</topic><topic>Morphology</topic><topic>Phosphate</topic><topic>Pore solution</topic><topic>Properties (attributes)</topic><topic>Protective coatings</topic><topic>Raman spectroscopy</topic><topic>Steel</topic><topic>Surface analysis (chemical)</topic><topic>X ray photoelectron spectroscopy</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Verbruggen, Hilke</creatorcontrib><creatorcontrib>Baert, Kitty</creatorcontrib><creatorcontrib>Terryn, Herman</creatorcontrib><creatorcontrib>De Graeve, Iris</creatorcontrib><collection>CrossRef</collection><collection>Ceramic Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Surface & coatings technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Verbruggen, Hilke</au><au>Baert, Kitty</au><au>Terryn, Herman</au><au>De Graeve, Iris</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Molybdate-phosphate conversion coatings to protect steel in a simulated concrete pore solution</atitle><jtitle>Surface & coatings technology</jtitle><date>2019-03-15</date><risdate>2019</risdate><volume>361</volume><spage>280</spage><epage>291</epage><pages>280-291</pages><issn>0257-8972</issn><eissn>1879-3347</eissn><abstract>For the corrosion protection of steel rebars in concrete, five different molybdate-phosphate conversion coatings were prepared, by changing the molybdate-phosphate ratio in the conversion baths. Their composition and morphology were studied with GD-OES, XPS, Raman spectroscopy and SEM-EDX and a schematic representation of their structure is suggested. Further, the corrosion resistance properties of the coatings were evaluated in a simulated concrete pore solution (CPS) containing chlorides, using anodic polarization measurements. Thanks to the elaborated surface analysis their corrosion behaviour could be correlated to their structure.
The results show that by altering the molybdate-phosphate ratio the structure and, consequently, the corrosion protection properties change significantly. By optimizing this ratio a twofold protection mechanism could be attained, demonstrating both good barrier properties and consistent with active corrosion protection.
[Display omitted]
•Five different molybdate-phosphate conversion coatings were prepared by varying the concentration of molybdate and phosphate in the conversion bath•Elaborated surface analysis study to explain electrochemical behaviour•By fine-tuning the molybdate/phosphate balance, one can achieve two-fold protection mechanism: a physical barrier combined with active corrosion protection</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.surfcoat.2018.09.056</doi><tpages>12</tpages></addata></record> |
| fulltext | fulltext |
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| ispartof | Surface & coatings technology, 2019-03, Vol.361, p.280-291 |
| issn | 0257-8972 1879-3347 |
| language | eng |
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| source | ScienceDirect Freedom Collection |
| subjects | Anodic polarization Concrete Conversion coating Conversion coatings Corrosion Corrosion prevention Corrosion resistance Corrosion resistant steels Molybdate Morphology Phosphate Pore solution Properties (attributes) Protective coatings Raman spectroscopy Steel Surface analysis (chemical) X ray photoelectron spectroscopy |
| title | Molybdate-phosphate conversion coatings to protect steel in a simulated concrete pore solution |
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