Electrochemical characterization of the protective film formed by the unsymmetrical Schiff's base on the mild steel surface in acid media
The corrosion inhibition efficiency of a newly synthesized Schiff's base for the corrosion of mild steel was studied in 1.0 M HCl and 0.5 M H 2SO 4 solutions. The results of weight loss measurements, electrochemical impedance and potentiodynamic polarization measurements consistently demonstrat...
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| Veröffentlicht in: | Electrochimica acta 2011-04, Vol.56 (11), p.3857-3863 |
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| creator | Mallaiya, Kumaravel Subramaniam, Rameshkumar Srikandan, Subramanian Sathyamangalam Gowri, S. Rajasekaran, N. Selvaraj, A. |
| description | The corrosion inhibition efficiency of a newly synthesized Schiff's base for the corrosion of mild steel was studied in 1.0
M HCl and 0.5
M H
2SO
4 solutions. The results of weight loss measurements, electrochemical impedance and potentiodynamic polarization measurements consistently demonstrated that the Schiff's base synthesized is a good corrosion inhibitor with an inhibitory efficiency of approximately 92% at an optimum inhibitor concentration of 600
mg/L. The inhibition in both of the corrosive media was observed to be a mixed type. The potential of zero charge (PZC) at the metal–solution interface was determined for both the inhibited and uninhibited solutions to provide the mechanism of inhibition. The inhibitor formed a film on the metal surface through chloride or sulfate bridges depending upon the medium. The temperature dependence of the corrosion rate was also studied in the temperature range from 27 to 50
°C. The value of the activation energy (
E
a) calculated showed that the inhibition film formation on the metal surface occurred through chemisorption. The thermodynamic parameters such as the adsorption equilibrium constant (
K
ads) and the free energy of adsorption (Δ
G
ads) were calculated and discussed. Several adsorption isotherms were tested and the experimental data fit well with the Langmuir adsorption isotherm. |
| doi_str_mv | 10.1016/j.electacta.2011.02.036 |
| format | Article |
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M HCl and 0.5
M H
2SO
4 solutions. The results of weight loss measurements, electrochemical impedance and potentiodynamic polarization measurements consistently demonstrated that the Schiff's base synthesized is a good corrosion inhibitor with an inhibitory efficiency of approximately 92% at an optimum inhibitor concentration of 600
mg/L. The inhibition in both of the corrosive media was observed to be a mixed type. The potential of zero charge (PZC) at the metal–solution interface was determined for both the inhibited and uninhibited solutions to provide the mechanism of inhibition. The inhibitor formed a film on the metal surface through chloride or sulfate bridges depending upon the medium. The temperature dependence of the corrosion rate was also studied in the temperature range from 27 to 50
°C. The value of the activation energy (
E
a) calculated showed that the inhibition film formation on the metal surface occurred through chemisorption. The thermodynamic parameters such as the adsorption equilibrium constant (
K
ads) and the free energy of adsorption (Δ
G
ads) were calculated and discussed. Several adsorption isotherms were tested and the experimental data fit well with the Langmuir adsorption isotherm.</description><identifier>ISSN: 0013-4686</identifier><identifier>EISSN: 1873-3859</identifier><identifier>DOI: 10.1016/j.electacta.2011.02.036</identifier><language>eng</language><publisher>Elsevier Ltd</publisher><subject>Adsorption ; Carbon steels ; Chemisorption ; Corrosion ; Corrosion inhibitors ; CPE ; Inhibition ; Inhibitors ; Mathematical analysis ; Potential of zero charge ; Schiff bases ; Schiff's bases ; Surface chemistry</subject><ispartof>Electrochimica acta, 2011-04, Vol.56 (11), p.3857-3863</ispartof><rights>2011 Elsevier Ltd</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c347t-14690eb4061b7a4685fd7fe4adf112b000bce011f82bc9d8ce9d1866e0235a5d3</citedby><cites>FETCH-LOGICAL-c347t-14690eb4061b7a4685fd7fe4adf112b000bce011f82bc9d8ce9d1866e0235a5d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.electacta.2011.02.036$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Mallaiya, Kumaravel</creatorcontrib><creatorcontrib>Subramaniam, Rameshkumar</creatorcontrib><creatorcontrib>Srikandan, Subramanian Sathyamangalam</creatorcontrib><creatorcontrib>Gowri, S.</creatorcontrib><creatorcontrib>Rajasekaran, N.</creatorcontrib><creatorcontrib>Selvaraj, A.</creatorcontrib><title>Electrochemical characterization of the protective film formed by the unsymmetrical Schiff's base on the mild steel surface in acid media</title><title>Electrochimica acta</title><description>The corrosion inhibition efficiency of a newly synthesized Schiff's base for the corrosion of mild steel was studied in 1.0
M HCl and 0.5
M H
2SO
4 solutions. The results of weight loss measurements, electrochemical impedance and potentiodynamic polarization measurements consistently demonstrated that the Schiff's base synthesized is a good corrosion inhibitor with an inhibitory efficiency of approximately 92% at an optimum inhibitor concentration of 600
mg/L. The inhibition in both of the corrosive media was observed to be a mixed type. The potential of zero charge (PZC) at the metal–solution interface was determined for both the inhibited and uninhibited solutions to provide the mechanism of inhibition. The inhibitor formed a film on the metal surface through chloride or sulfate bridges depending upon the medium. The temperature dependence of the corrosion rate was also studied in the temperature range from 27 to 50
°C. The value of the activation energy (
E
a) calculated showed that the inhibition film formation on the metal surface occurred through chemisorption. The thermodynamic parameters such as the adsorption equilibrium constant (
K
ads) and the free energy of adsorption (Δ
G
ads) were calculated and discussed. Several adsorption isotherms were tested and the experimental data fit well with the Langmuir adsorption isotherm.</description><subject>Adsorption</subject><subject>Carbon steels</subject><subject>Chemisorption</subject><subject>Corrosion</subject><subject>Corrosion inhibitors</subject><subject>CPE</subject><subject>Inhibition</subject><subject>Inhibitors</subject><subject>Mathematical analysis</subject><subject>Potential of zero charge</subject><subject>Schiff bases</subject><subject>Schiff's bases</subject><subject>Surface chemistry</subject><issn>0013-4686</issn><issn>1873-3859</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNqFkM1KAzEUhYMoWKvPYHZdzXgzmclMl6XUHyi4UNchk9wwKfNTk2mhvoFvbdqKWyFwF_nOB-cQcs8gZcDEwybFFvWo4kszYCyFLAUuLsiEVSVPeFXML8kEgPEkF5W4JjchbACgFCVMyPfqGPaDbrBzWrVUN8pHF3r3pUY39HSwdGyQbv0wRtLtkVrXdtQOvkND68Ppd9eHQ9fh6E-ON904a2eB1iogjY4j0rnW0DAitjTsvFUaqeup0s7QKHLqllxZ1Qa8-71T8vG4el8-J-vXp5flYp1onpdjwnIxB6xzEKwuVWxUWFNazJWxjGV1LFZrjDPYKqv13FQa54ZVQiBkvFCF4VMyO3tjo88dhlF2LmhsW9XjsAuyKgvgLOc8kuWZ1H4IwaOVW-865Q-SgTxuLzfyb3t53F5CJuP2Mbk4JzEW2Tv0MmiHvY49feSlGdy_jh-Nk5Q-</recordid><startdate>20110415</startdate><enddate>20110415</enddate><creator>Mallaiya, Kumaravel</creator><creator>Subramaniam, Rameshkumar</creator><creator>Srikandan, Subramanian Sathyamangalam</creator><creator>Gowri, S.</creator><creator>Rajasekaran, N.</creator><creator>Selvaraj, A.</creator><general>Elsevier Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SE</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>FR3</scope><scope>JG9</scope><scope>KR7</scope><scope>L7M</scope></search><sort><creationdate>20110415</creationdate><title>Electrochemical characterization of the protective film formed by the unsymmetrical Schiff's base on the mild steel surface in acid media</title><author>Mallaiya, Kumaravel ; Subramaniam, Rameshkumar ; Srikandan, Subramanian Sathyamangalam ; Gowri, S. ; Rajasekaran, N. ; Selvaraj, A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c347t-14690eb4061b7a4685fd7fe4adf112b000bce011f82bc9d8ce9d1866e0235a5d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Adsorption</topic><topic>Carbon steels</topic><topic>Chemisorption</topic><topic>Corrosion</topic><topic>Corrosion inhibitors</topic><topic>CPE</topic><topic>Inhibition</topic><topic>Inhibitors</topic><topic>Mathematical analysis</topic><topic>Potential of zero charge</topic><topic>Schiff bases</topic><topic>Schiff's bases</topic><topic>Surface chemistry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Mallaiya, Kumaravel</creatorcontrib><creatorcontrib>Subramaniam, Rameshkumar</creatorcontrib><creatorcontrib>Srikandan, Subramanian Sathyamangalam</creatorcontrib><creatorcontrib>Gowri, S.</creatorcontrib><creatorcontrib>Rajasekaran, N.</creatorcontrib><creatorcontrib>Selvaraj, A.</creatorcontrib><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>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Civil Engineering Abstracts</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>Mallaiya, Kumaravel</au><au>Subramaniam, Rameshkumar</au><au>Srikandan, Subramanian Sathyamangalam</au><au>Gowri, S.</au><au>Rajasekaran, N.</au><au>Selvaraj, A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Electrochemical characterization of the protective film formed by the unsymmetrical Schiff's base on the mild steel surface in acid media</atitle><jtitle>Electrochimica acta</jtitle><date>2011-04-15</date><risdate>2011</risdate><volume>56</volume><issue>11</issue><spage>3857</spage><epage>3863</epage><pages>3857-3863</pages><issn>0013-4686</issn><eissn>1873-3859</eissn><abstract>The corrosion inhibition efficiency of a newly synthesized Schiff's base for the corrosion of mild steel was studied in 1.0
M HCl and 0.5
M H
2SO
4 solutions. The results of weight loss measurements, electrochemical impedance and potentiodynamic polarization measurements consistently demonstrated that the Schiff's base synthesized is a good corrosion inhibitor with an inhibitory efficiency of approximately 92% at an optimum inhibitor concentration of 600
mg/L. The inhibition in both of the corrosive media was observed to be a mixed type. The potential of zero charge (PZC) at the metal–solution interface was determined for both the inhibited and uninhibited solutions to provide the mechanism of inhibition. The inhibitor formed a film on the metal surface through chloride or sulfate bridges depending upon the medium. The temperature dependence of the corrosion rate was also studied in the temperature range from 27 to 50
°C. The value of the activation energy (
E
a) calculated showed that the inhibition film formation on the metal surface occurred through chemisorption. The thermodynamic parameters such as the adsorption equilibrium constant (
K
ads) and the free energy of adsorption (Δ
G
ads) were calculated and discussed. Several adsorption isotherms were tested and the experimental data fit well with the Langmuir adsorption isotherm.</abstract><pub>Elsevier Ltd</pub><doi>10.1016/j.electacta.2011.02.036</doi><tpages>7</tpages></addata></record> |
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| ispartof | Electrochimica acta, 2011-04, Vol.56 (11), p.3857-3863 |
| issn | 0013-4686 1873-3859 |
| language | eng |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Adsorption Carbon steels Chemisorption Corrosion Corrosion inhibitors CPE Inhibition Inhibitors Mathematical analysis Potential of zero charge Schiff bases Schiff's bases Surface chemistry |
| title | Electrochemical characterization of the protective film formed by the unsymmetrical Schiff's base on the mild steel surface in acid media |
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