Synergistic and Antagonistic Effects of Sodium Molybdate-Zn2+ System
The inhibition efficiency (IE) of sodium molybdate (SM) in controlling corrosion of carbon steel in an aqueous solution containing 120 ppm of Cl-, in the absence and presence of Zn2+ has been evaluated by weight-loss method. A synergistic effect exists between SM and Zn2+ when the concentration of Z...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | E-Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2012/368147 |
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| author | J. Wilson Sahayaraj A. John Amalraj Susai Rajendran N. Vijaya |
| author_facet | J. Wilson Sahayaraj A. John Amalraj Susai Rajendran N. Vijaya |
| author_sort | J. Wilson Sahayaraj |
| collection | DOAJ |
| description | The inhibition efficiency (IE) of sodium molybdate (SM) in controlling corrosion of carbon steel in an aqueous solution containing 120 ppm of Cl-, in the absence and presence of Zn2+ has been evaluated by weight-loss method. A synergistic effect exists between SM and Zn2+ when the concentration of Zn2+ is 25 ppm and above. Inhibition efficiencies obtained are greater than 85%. Antagonistic effect exists between SM and Zn2+ when the concentration of Zn2+ is 10 ppm and below. The SM-Zn2+ system shows excellent IE up to third day. Above third day IE decreases. Acceleration of corrosion takes place. Excellent IE is shown at pH 5,7 and 12. At pH 9, IE decreases since Zn2+ is precipitated as Zn(OH)2 in the bulk of the solution. Polarization study reveals that SM-Zn2+ system functions as a mixed inhibitor. FTIR spectra reveal that the protective film consists of Fe2+-SM complex and Zn(OH)2. |
| format | Article |
| id | doaj-art-d226084fdbfb4d58adeaafe594882af6 |
| institution | Kabale University |
| issn | 0973-4945 2090-9810 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | E-Journal of Chemistry |
| spelling | doaj-art-d226084fdbfb4d58adeaafe594882af62025-02-03T01:31:50ZengWileyE-Journal of Chemistry0973-49452090-98102012-01-01941746175210.1155/2012/368147Synergistic and Antagonistic Effects of Sodium Molybdate-Zn2+ SystemJ. Wilson Sahayaraj0A. John Amalraj1Susai Rajendran2N. Vijaya3Department of Chemistry, Jeppiaar Engineering College, Chennai - 600 119, IndiaDepartment of Chemistry, Peiryar E.V.R. College, Trichy, Tamil Nadu, IndiaDepartment of Chemistry, RVS School of Engineering and Technology, Tamil Nadu, IndiaDepartment of Chemistry, Vellalar College for Women, Erode, IndiaThe inhibition efficiency (IE) of sodium molybdate (SM) in controlling corrosion of carbon steel in an aqueous solution containing 120 ppm of Cl-, in the absence and presence of Zn2+ has been evaluated by weight-loss method. A synergistic effect exists between SM and Zn2+ when the concentration of Zn2+ is 25 ppm and above. Inhibition efficiencies obtained are greater than 85%. Antagonistic effect exists between SM and Zn2+ when the concentration of Zn2+ is 10 ppm and below. The SM-Zn2+ system shows excellent IE up to third day. Above third day IE decreases. Acceleration of corrosion takes place. Excellent IE is shown at pH 5,7 and 12. At pH 9, IE decreases since Zn2+ is precipitated as Zn(OH)2 in the bulk of the solution. Polarization study reveals that SM-Zn2+ system functions as a mixed inhibitor. FTIR spectra reveal that the protective film consists of Fe2+-SM complex and Zn(OH)2.http://dx.doi.org/10.1155/2012/368147 |
| spellingShingle | J. Wilson Sahayaraj A. John Amalraj Susai Rajendran N. Vijaya Synergistic and Antagonistic Effects of Sodium Molybdate-Zn2+ System E-Journal of Chemistry |
| title | Synergistic and Antagonistic Effects of Sodium Molybdate-Zn2+ System |
| title_full | Synergistic and Antagonistic Effects of Sodium Molybdate-Zn2+ System |
| title_fullStr | Synergistic and Antagonistic Effects of Sodium Molybdate-Zn2+ System |
| title_full_unstemmed | Synergistic and Antagonistic Effects of Sodium Molybdate-Zn2+ System |
| title_short | Synergistic and Antagonistic Effects of Sodium Molybdate-Zn2+ System |
| title_sort | synergistic and antagonistic effects of sodium molybdate zn2 system |
| url | http://dx.doi.org/10.1155/2012/368147 |
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