Synergistic inhibition effect of walnut green husk extract and potassium iodide on the corrosion of cold rolled steel in trichloroacetic acid solution
Plant extract inhibitor is of low price, rich natural raw resources, eco-friendly and biodegradable. To further strengthen inhibition stability and efficiency, halide ion is always mixed with plant extract so as to produce synergism. In the present work, the synergistic inhibition effect of walnut g...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785420319840 |
| _version_ | 1818665570623553536 |
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| author | Xianghong Li Shuduan Deng |
| author_facet | Xianghong Li Shuduan Deng |
| author_sort | Xianghong Li |
| collection | DOAJ |
| description | Plant extract inhibitor is of low price, rich natural raw resources, eco-friendly and biodegradable. To further strengthen inhibition stability and efficiency, halide ion is always mixed with plant extract so as to produce synergism. In the present work, the synergistic inhibition effect of walnut green husk extract (WGHE) and potassium iodide (KI) on the corrosion of cold rolled steel (CRS) in trichloroacetic acid (Cl3CCOOH) solution was studied by weight loss, electrochemical techniques and surface analysis. Results show that WGHE moderately inhibits the corrosion of CRS in Cl3CCOOH media. However, WGHE/KI mixture has pleasant inhibitive ability with the maximum inhibition efficiency of 97.2% in 0.10 M Cl3CCOOH from weight loss method. There is a synergism for WGHE mixing with KI, and all corresponding synergism parameters are high than unity. The adsorption of WGHE either in the absence or presence of KI obeys Langmuir adsorption isotherm, and the external addition of KI facilitates the adsorption of WGHE on steel surface. Individual WGHE mainly retards cathodic reaction, while WGHE/KI mixture drastically inhibits both anodic and cathodic reactions simultaneously. Nyquist appears a capacitive loop at high frequencies followed by an inductive loop at low frequencies. The charge transfer resistance follows the order: WGHE/KI > KI > WGHE. SEM and AFM clearly proves the corrosion degree and surface roughness of CRS surface were dropped to more extent with the synergistic WGHE/KI mixture. Moreover, the synergistic inhibition of two main components of juglone and kaempferol with KI was discussed in detail under same conditions. |
| first_indexed | 2024-12-17T05:50:44Z |
| format | Article |
| id | doaj.art-7907b65d0da441d983a85300ac3ede6f |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-17T05:50:44Z |
| publishDate | 2020-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-7907b65d0da441d983a85300ac3ede6f2022-12-21T22:01:10ZengElsevierJournal of Materials Research and Technology2238-78542020-11-01961560415620Synergistic inhibition effect of walnut green husk extract and potassium iodide on the corrosion of cold rolled steel in trichloroacetic acid solutionXianghong Li0Shuduan Deng1College of Chemical Engineering, Southwest Forestry University, Kunming, 650224, PR China; Corresponding author.Faculty of Materials Science and Engineering, Southwest Forestry University, Kunming, 650224, PR ChinaPlant extract inhibitor is of low price, rich natural raw resources, eco-friendly and biodegradable. To further strengthen inhibition stability and efficiency, halide ion is always mixed with plant extract so as to produce synergism. In the present work, the synergistic inhibition effect of walnut green husk extract (WGHE) and potassium iodide (KI) on the corrosion of cold rolled steel (CRS) in trichloroacetic acid (Cl3CCOOH) solution was studied by weight loss, electrochemical techniques and surface analysis. Results show that WGHE moderately inhibits the corrosion of CRS in Cl3CCOOH media. However, WGHE/KI mixture has pleasant inhibitive ability with the maximum inhibition efficiency of 97.2% in 0.10 M Cl3CCOOH from weight loss method. There is a synergism for WGHE mixing with KI, and all corresponding synergism parameters are high than unity. The adsorption of WGHE either in the absence or presence of KI obeys Langmuir adsorption isotherm, and the external addition of KI facilitates the adsorption of WGHE on steel surface. Individual WGHE mainly retards cathodic reaction, while WGHE/KI mixture drastically inhibits both anodic and cathodic reactions simultaneously. Nyquist appears a capacitive loop at high frequencies followed by an inductive loop at low frequencies. The charge transfer resistance follows the order: WGHE/KI > KI > WGHE. SEM and AFM clearly proves the corrosion degree and surface roughness of CRS surface were dropped to more extent with the synergistic WGHE/KI mixture. Moreover, the synergistic inhibition of two main components of juglone and kaempferol with KI was discussed in detail under same conditions.http://www.sciencedirect.com/science/article/pii/S2238785420319840Corrosion inhibitionSynergismSteelAdsorptionSurface analysis |
| spellingShingle | Xianghong Li Shuduan Deng Synergistic inhibition effect of walnut green husk extract and potassium iodide on the corrosion of cold rolled steel in trichloroacetic acid solution Journal of Materials Research and Technology Corrosion inhibition Synergism Steel Adsorption Surface analysis |
| title | Synergistic inhibition effect of walnut green husk extract and potassium iodide on the corrosion of cold rolled steel in trichloroacetic acid solution |
| title_full | Synergistic inhibition effect of walnut green husk extract and potassium iodide on the corrosion of cold rolled steel in trichloroacetic acid solution |
| title_fullStr | Synergistic inhibition effect of walnut green husk extract and potassium iodide on the corrosion of cold rolled steel in trichloroacetic acid solution |
| title_full_unstemmed | Synergistic inhibition effect of walnut green husk extract and potassium iodide on the corrosion of cold rolled steel in trichloroacetic acid solution |
| title_short | Synergistic inhibition effect of walnut green husk extract and potassium iodide on the corrosion of cold rolled steel in trichloroacetic acid solution |
| title_sort | synergistic inhibition effect of walnut green husk extract and potassium iodide on the corrosion of cold rolled steel in trichloroacetic acid solution |
| topic | Corrosion inhibition Synergism Steel Adsorption Surface analysis |
| url | http://www.sciencedirect.com/science/article/pii/S2238785420319840 |
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