Influence of Ethanol on Pitting Corrosion Behavior of Stainless Steel for Bioethanol Fermentation Tanks
The role of ethanol (C2H5OH) in pitting corrosion behavior of AISI 316L austenitic stainless steel was investigated in aqueous ethanolic solution with chloride. The pitting susceptibility and surface morphology of 316L in a series of ethanol-containing solutions were examined using X-ray photoelectr...
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Frontiers Media S.A.
2020-06-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fchem.2020.00529/full |
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| author | Yiting Wan Yangting Sun Dingzhou Cai Liqiang Yin Nianwei Dai Longlin Lei Yiming Jiang Jin Li |
| author_facet | Yiting Wan Yangting Sun Dingzhou Cai Liqiang Yin Nianwei Dai Longlin Lei Yiming Jiang Jin Li |
| author_sort | Yiting Wan |
| collection | DOAJ |
| description | The role of ethanol (C2H5OH) in pitting corrosion behavior of AISI 316L austenitic stainless steel was investigated in aqueous ethanolic solution with chloride. The pitting susceptibility and surface morphology of 316L in a series of ethanol-containing solutions were examined using X-ray photoelectron spectroscopy (XPS), optical microscopy with 3D stitching, immersion tests, and potentiodynamic polarization measurements. Results demonstrated that the ethanol concentration impacted little on the passive film stability while it dramatically influenced the pitting corrosion susceptibility. Corrosion rate of 316L after immersion tests first increased and then decreased as the concentration of ethanol increased from 0 to 10 M in ferric chloride solution. This, however, did not correspond to the breakdown potential which directly decreased from 489 to 249 mV as the water concentration decreased in ethanolic NaCl solutions. The pits density after both immersion and electrochemical tests showed that the initiation of pitting in ethanolic solution tended to occur at multiple points at the same time. The synergy effect on pitting behavior of hydrolysis enhancement and solubility reduction of metal cations due to the introduction of ethanol has also been discussed. |
| first_indexed | 2024-04-12T07:38:49Z |
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| id | doaj.art-7f3e7fc504574cfcb30ffaf47da8c1fc |
| institution | Directory Open Access Journal |
| issn | 2296-2646 |
| language | English |
| last_indexed | 2024-04-12T07:38:49Z |
| publishDate | 2020-06-01 |
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| series | Frontiers in Chemistry |
| spelling | doaj.art-7f3e7fc504574cfcb30ffaf47da8c1fc2022-12-22T03:41:51ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462020-06-01810.3389/fchem.2020.00529556068Influence of Ethanol on Pitting Corrosion Behavior of Stainless Steel for Bioethanol Fermentation TanksYiting Wan0Yangting Sun1Dingzhou Cai2Liqiang Yin3Nianwei Dai4Longlin Lei5Yiming Jiang6Jin Li7Corrosion Lab, Department of Materials Science, Fudan University, Shanghai, ChinaCorrosion Lab, Department of Materials Science, Fudan University, Shanghai, ChinaInstitute of Materials, China Academy of Engineering Physics, Mianyang, ChinaCorrosion Lab, Department of Materials Science, Fudan University, Shanghai, ChinaCorrosion Lab, Department of Materials Science, Fudan University, Shanghai, ChinaCorrosion Lab, Department of Materials Science, Fudan University, Shanghai, ChinaCorrosion Lab, Department of Materials Science, Fudan University, Shanghai, ChinaCorrosion Lab, Department of Materials Science, Fudan University, Shanghai, ChinaThe role of ethanol (C2H5OH) in pitting corrosion behavior of AISI 316L austenitic stainless steel was investigated in aqueous ethanolic solution with chloride. The pitting susceptibility and surface morphology of 316L in a series of ethanol-containing solutions were examined using X-ray photoelectron spectroscopy (XPS), optical microscopy with 3D stitching, immersion tests, and potentiodynamic polarization measurements. Results demonstrated that the ethanol concentration impacted little on the passive film stability while it dramatically influenced the pitting corrosion susceptibility. Corrosion rate of 316L after immersion tests first increased and then decreased as the concentration of ethanol increased from 0 to 10 M in ferric chloride solution. This, however, did not correspond to the breakdown potential which directly decreased from 489 to 249 mV as the water concentration decreased in ethanolic NaCl solutions. The pits density after both immersion and electrochemical tests showed that the initiation of pitting in ethanolic solution tended to occur at multiple points at the same time. The synergy effect on pitting behavior of hydrolysis enhancement and solubility reduction of metal cations due to the introduction of ethanol has also been discussed.https://www.frontiersin.org/article/10.3389/fchem.2020.00529/fullstainless steelethanolic solutionspitting corrosionpotentiodynamic polarizationmorphology |
| spellingShingle | Yiting Wan Yangting Sun Dingzhou Cai Liqiang Yin Nianwei Dai Longlin Lei Yiming Jiang Jin Li Influence of Ethanol on Pitting Corrosion Behavior of Stainless Steel for Bioethanol Fermentation Tanks Frontiers in Chemistry stainless steel ethanolic solutions pitting corrosion potentiodynamic polarization morphology |
| title | Influence of Ethanol on Pitting Corrosion Behavior of Stainless Steel for Bioethanol Fermentation Tanks |
| title_full | Influence of Ethanol on Pitting Corrosion Behavior of Stainless Steel for Bioethanol Fermentation Tanks |
| title_fullStr | Influence of Ethanol on Pitting Corrosion Behavior of Stainless Steel for Bioethanol Fermentation Tanks |
| title_full_unstemmed | Influence of Ethanol on Pitting Corrosion Behavior of Stainless Steel for Bioethanol Fermentation Tanks |
| title_short | Influence of Ethanol on Pitting Corrosion Behavior of Stainless Steel for Bioethanol Fermentation Tanks |
| title_sort | influence of ethanol on pitting corrosion behavior of stainless steel for bioethanol fermentation tanks |
| topic | stainless steel ethanolic solutions pitting corrosion potentiodynamic polarization morphology |
| url | https://www.frontiersin.org/article/10.3389/fchem.2020.00529/full |
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