Effect of chloride concentration on the corrosion resistance of pure Zn metal in a 0.0626 M H2SO4 solution
The aftermath of Cl− anion concentration reactions on the corrosion resistance of pure Zn metal in 0.0625 M H2SO4 was examined by potentiodynamic polarization, optical representations, scanning electron image analysis, energy dispersive X-ray (EDX) spectroscopy, open-circuit potential analysis, X-ra...
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| Format: | Article |
| Language: | English |
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De Gruyter
2023-07-01
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| Series: | Open Engineering |
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| Online Access: | https://doi.org/10.1515/eng-2022-0445 |
| _version_ | 1797773490737119232 |
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| author | Loto Roland Tolulope |
| author_facet | Loto Roland Tolulope |
| author_sort | Loto Roland Tolulope |
| collection | DOAJ |
| description | The aftermath of Cl− anion concentration reactions on the corrosion resistance of pure Zn metal in 0.0625 M H2SO4 was examined by potentiodynamic polarization, optical representations, scanning electron image analysis, energy dispersive X-ray (EDX) spectroscopy, open-circuit potential analysis, X-ray diffractometry, weight loss method and X-ray fluorescence. The results show that the degradation of Zn increased with an increase in the chloride concentration from 4.089 and 0.218 mm/year to 10.085 and 4.015 mm/year (polarization and weight loss). The corrosion potential at 0.0625 M H2SO4 to 0.0625 M H2SO4/0.5% NaCl concentration displayed minimal variation (−1.535 to −1.519 V), whereas a significant shift was observed for the plots at 0.0625 M H2SO4/1% NaCl and 0.0625 M H2SO4/2% NaCl (−1.384 and −0.932 V). The weight loss plot at all Cl− anion concentrations displayed an ordered decrease in the corrosion rate analogous to exposure times. The scanning electron microscopic images of Zn in 0.0625 M H2SO4/2% NaCl solution showed significant deterioration and corrosion pits. The image at 0.0625 M H2SO4 solution revealed limited localized and general surface deterioration, while the corresponding EDX data depict the presence of S. The Zn open-circuit potential plot from a 0.0625 M H2SO4 solution was relatively electropositive compared to the plot from a 0.0625 M H2SO4/2% NaCl solution. Both plots exhibited limited reactive-inert transition properties and attained relative thermodynamic equilibrium after 600 s of exposure with final corrosion potentials of −0.91 and −0.97 V at 7,200 s. Zn was the only crystallographic phase identified on its surface before corrosion, whereas ZnS, ZnFes, ZnMnS, ZnMnFeS, and ZnMg4 corrosion products were identified after corrosion. |
| first_indexed | 2024-03-12T22:07:18Z |
| format | Article |
| id | doaj.art-9ef83446c5bc4ab7b9cae0cedbd8976c |
| institution | Directory Open Access Journal |
| issn | 2391-5439 |
| language | English |
| last_indexed | 2024-03-12T22:07:18Z |
| publishDate | 2023-07-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Open Engineering |
| spelling | doaj.art-9ef83446c5bc4ab7b9cae0cedbd8976c2023-07-24T11:18:46ZengDe GruyterOpen Engineering2391-54392023-07-011313697610.1515/eng-2022-0445Effect of chloride concentration on the corrosion resistance of pure Zn metal in a 0.0626 M H2SO4 solutionLoto Roland Tolulope0Department of Mechanical Engineering, Covenant University, Ota, Ogun State, NigeriaThe aftermath of Cl− anion concentration reactions on the corrosion resistance of pure Zn metal in 0.0625 M H2SO4 was examined by potentiodynamic polarization, optical representations, scanning electron image analysis, energy dispersive X-ray (EDX) spectroscopy, open-circuit potential analysis, X-ray diffractometry, weight loss method and X-ray fluorescence. The results show that the degradation of Zn increased with an increase in the chloride concentration from 4.089 and 0.218 mm/year to 10.085 and 4.015 mm/year (polarization and weight loss). The corrosion potential at 0.0625 M H2SO4 to 0.0625 M H2SO4/0.5% NaCl concentration displayed minimal variation (−1.535 to −1.519 V), whereas a significant shift was observed for the plots at 0.0625 M H2SO4/1% NaCl and 0.0625 M H2SO4/2% NaCl (−1.384 and −0.932 V). The weight loss plot at all Cl− anion concentrations displayed an ordered decrease in the corrosion rate analogous to exposure times. The scanning electron microscopic images of Zn in 0.0625 M H2SO4/2% NaCl solution showed significant deterioration and corrosion pits. The image at 0.0625 M H2SO4 solution revealed limited localized and general surface deterioration, while the corresponding EDX data depict the presence of S. The Zn open-circuit potential plot from a 0.0625 M H2SO4 solution was relatively electropositive compared to the plot from a 0.0625 M H2SO4/2% NaCl solution. Both plots exhibited limited reactive-inert transition properties and attained relative thermodynamic equilibrium after 600 s of exposure with final corrosion potentials of −0.91 and −0.97 V at 7,200 s. Zn was the only crystallographic phase identified on its surface before corrosion, whereas ZnS, ZnFes, ZnMnS, ZnMnFeS, and ZnMg4 corrosion products were identified after corrosion.https://doi.org/10.1515/eng-2022-0445zinccorrosion managementnaclenvironmental degradationh2so4 |
| spellingShingle | Loto Roland Tolulope Effect of chloride concentration on the corrosion resistance of pure Zn metal in a 0.0626 M H2SO4 solution Open Engineering zinc corrosion management nacl environmental degradation h2so4 |
| title | Effect of chloride concentration on the corrosion resistance of pure Zn metal in a 0.0626 M H2SO4 solution |
| title_full | Effect of chloride concentration on the corrosion resistance of pure Zn metal in a 0.0626 M H2SO4 solution |
| title_fullStr | Effect of chloride concentration on the corrosion resistance of pure Zn metal in a 0.0626 M H2SO4 solution |
| title_full_unstemmed | Effect of chloride concentration on the corrosion resistance of pure Zn metal in a 0.0626 M H2SO4 solution |
| title_short | Effect of chloride concentration on the corrosion resistance of pure Zn metal in a 0.0626 M H2SO4 solution |
| title_sort | effect of chloride concentration on the corrosion resistance of pure zn metal in a 0 0626 m h2so4 solution |
| topic | zinc corrosion management nacl environmental degradation h2so4 |
| url | https://doi.org/10.1515/eng-2022-0445 |
| work_keys_str_mv | AT lotorolandtolulope effectofchlorideconcentrationonthecorrosionresistanceofpureznmetalina00626mh2so4solution |