Thermodynamic and Kinetic Investigations of Corrosion Inhibition Behavior of 2-MBT on Steel at a pH of 8
Corrosion results in hazardous and expensive damage to pipelines, vehicles, water and wastewater systems, and even home appliances. One of the most extensively practical methods for protecting metals and alloys against corrosion is to use organic inhibitors. The inhibition capability of 2-Mercaptobe...
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| Format: | Article |
| Language: | English |
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Petroleum University of Technology
2019-07-01
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| Series: | Iranian Journal of Oil & Gas Science and Technology |
| Subjects: | |
| Online Access: | http://ijogst.put.ac.ir/article_55732_fd29d40fe5a2dc5d6a794f56019b192b.pdf |
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| author | Hojatallah Koraee Hadi Eskandari Iman Danaee |
| author_facet | Hojatallah Koraee Hadi Eskandari Iman Danaee |
| author_sort | Hojatallah Koraee |
| collection | DOAJ |
| description | Corrosion results in hazardous and expensive damage to pipelines, vehicles, water and wastewater systems, and even home appliances. One of the most extensively practical methods for protecting metals and alloys against corrosion is to use organic inhibitors. The inhibition capability of 2-Mercaptobenzothiazole (2-MBT) against the corrosion of carbon steel in a 2 M NaCl solution was examined by Tafel polarization. By using 2-Mercaptobenzothiazole both the cathodic and anodic reactions are delayed through chemical and physical adsorption and blocking the active corrosion sites. Based on the polarization curves, it was indicated that by increasing the inhibitor concentration, the inhibition efficiency increases up to 70% at room temperature, and it improves at higher temperatures. The adsorption of 2-Mercaptobenzothiazole was based on the Langmuir adsorption isotherm. The enthalpies of activation were determined to be around +50 kJ.mol-1. The endothermic nature of the steel dissolution procedure is reflected by the positive symbols of the enthalpies (ΔH) of activation process. The determined values range from -32.69 to -35.81 kJ.mol-1, which shows both electrostatic adsorption and the chemisorption of the adsorption mechanism. The calculated entropy of adsorption was 78 J.mol-1.K-1 indicating the increment in the solvent entropy and a more positive water desorption entropy. |
| first_indexed | 2024-12-12T02:04:01Z |
| format | Article |
| id | doaj.art-685c85aad33046d299bf2961818cfe7a |
| institution | Directory Open Access Journal |
| issn | 2345-2412 2345-2420 |
| language | English |
| last_indexed | 2024-12-12T02:04:01Z |
| publishDate | 2019-07-01 |
| publisher | Petroleum University of Technology |
| record_format | Article |
| series | Iranian Journal of Oil & Gas Science and Technology |
| spelling | doaj.art-685c85aad33046d299bf2961818cfe7a2022-12-22T00:42:06ZengPetroleum University of TechnologyIranian Journal of Oil & Gas Science and Technology2345-24122345-24202019-07-018310111210.22050/ijogst.2018.5573255732Thermodynamic and Kinetic Investigations of Corrosion Inhibition Behavior of 2-MBT on Steel at a pH of 8Hojatallah Koraee0Hadi Eskandari1Iman Danaee2M.S. Student, Department of Chemical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, IranAssistant Professor, Department of Technical Inspection, Petroleum University of Technology, Abadan, IranAssociate Professor, Department of Technical Inspection, Petroleum University of Technology, Abadan, IranCorrosion results in hazardous and expensive damage to pipelines, vehicles, water and wastewater systems, and even home appliances. One of the most extensively practical methods for protecting metals and alloys against corrosion is to use organic inhibitors. The inhibition capability of 2-Mercaptobenzothiazole (2-MBT) against the corrosion of carbon steel in a 2 M NaCl solution was examined by Tafel polarization. By using 2-Mercaptobenzothiazole both the cathodic and anodic reactions are delayed through chemical and physical adsorption and blocking the active corrosion sites. Based on the polarization curves, it was indicated that by increasing the inhibitor concentration, the inhibition efficiency increases up to 70% at room temperature, and it improves at higher temperatures. The adsorption of 2-Mercaptobenzothiazole was based on the Langmuir adsorption isotherm. The enthalpies of activation were determined to be around +50 kJ.mol-1. The endothermic nature of the steel dissolution procedure is reflected by the positive symbols of the enthalpies (ΔH) of activation process. The determined values range from -32.69 to -35.81 kJ.mol-1, which shows both electrostatic adsorption and the chemisorption of the adsorption mechanism. The calculated entropy of adsorption was 78 J.mol-1.K-1 indicating the increment in the solvent entropy and a more positive water desorption entropy.http://ijogst.put.ac.ir/article_55732_fd29d40fe5a2dc5d6a794f56019b192b.pdfpolarizationcorrosion inhibitoradsorptionsteel |
| spellingShingle | Hojatallah Koraee Hadi Eskandari Iman Danaee Thermodynamic and Kinetic Investigations of Corrosion Inhibition Behavior of 2-MBT on Steel at a pH of 8 Iranian Journal of Oil & Gas Science and Technology polarization corrosion inhibitor adsorption steel |
| title | Thermodynamic and Kinetic Investigations of Corrosion Inhibition Behavior of 2-MBT on Steel at a pH of 8 |
| title_full | Thermodynamic and Kinetic Investigations of Corrosion Inhibition Behavior of 2-MBT on Steel at a pH of 8 |
| title_fullStr | Thermodynamic and Kinetic Investigations of Corrosion Inhibition Behavior of 2-MBT on Steel at a pH of 8 |
| title_full_unstemmed | Thermodynamic and Kinetic Investigations of Corrosion Inhibition Behavior of 2-MBT on Steel at a pH of 8 |
| title_short | Thermodynamic and Kinetic Investigations of Corrosion Inhibition Behavior of 2-MBT on Steel at a pH of 8 |
| title_sort | thermodynamic and kinetic investigations of corrosion inhibition behavior of 2 mbt on steel at a ph of 8 |
| topic | polarization corrosion inhibitor adsorption steel |
| url | http://ijogst.put.ac.ir/article_55732_fd29d40fe5a2dc5d6a794f56019b192b.pdf |
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