Molar Ratio Effect of Sodium to Chloride Ions on the Electrochemical Corrosion of Alloy 600 and SA508 in HCl + NaOH Mixtures
This study aims to investigate the molar ratio effect of sodium to chloride ions on the corrosion of an Alloy 600 steam generator tube and an SA508 tubesheet material. The corrosion behavior was evaluated in solutions with three different molar ratios of sodium to chloride ions using a potentiodynam...
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MDPI AG
2020-04-01
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| Online Access: | https://www.mdpi.com/1996-1944/13/8/1970 |
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| author | Do Haeng Hur Jeoh Han Jun Choi |
| author_facet | Do Haeng Hur Jeoh Han Jun Choi |
| author_sort | Do Haeng Hur |
| collection | DOAJ |
| description | This study aims to investigate the molar ratio effect of sodium to chloride ions on the corrosion of an Alloy 600 steam generator tube and an SA508 tubesheet material. The corrosion behavior was evaluated in solutions with three different molar ratios of sodium to chloride ions using a potentiodynamic polarization method. The corrosion potentials and corrosion rates of both the two materials were significantly decreased as the molar ratio increased from 0.1 to 10. Therefore, it is recommended that the molar ratio control to a value of 1 is beneficial only when the crevice chemistry has a low molar ratio with an acidic pH. The corrosion potentials and corrosion rates were little affected by the total sodium and chloride ion concentrations. SA508 acted as an anode and its corrosion rate was accelerated by galvanic coupling with Alloy 600. |
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| format | Article |
| id | doaj.art-37adc2638ad04b579cd9c1d80bf5d02b |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T20:17:10Z |
| publishDate | 2020-04-01 |
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| spelling | doaj.art-37adc2638ad04b579cd9c1d80bf5d02b2023-11-19T22:27:39ZengMDPI AGMaterials1996-19442020-04-01138197010.3390/ma13081970Molar Ratio Effect of Sodium to Chloride Ions on the Electrochemical Corrosion of Alloy 600 and SA508 in HCl + NaOH MixturesDo Haeng Hur0Jeoh Han1Jun Choi2Korea Atomic Energy Research Institute, 989-111, Deadeok-daero, Yuseong-gu, Daejeon 34057, KoreaKorea Atomic Energy Research Institute, 989-111, Deadeok-daero, Yuseong-gu, Daejeon 34057, KoreaKorea Atomic Energy Research Institute, 989-111, Deadeok-daero, Yuseong-gu, Daejeon 34057, KoreaThis study aims to investigate the molar ratio effect of sodium to chloride ions on the corrosion of an Alloy 600 steam generator tube and an SA508 tubesheet material. The corrosion behavior was evaluated in solutions with three different molar ratios of sodium to chloride ions using a potentiodynamic polarization method. The corrosion potentials and corrosion rates of both the two materials were significantly decreased as the molar ratio increased from 0.1 to 10. Therefore, it is recommended that the molar ratio control to a value of 1 is beneficial only when the crevice chemistry has a low molar ratio with an acidic pH. The corrosion potentials and corrosion rates were little affected by the total sodium and chloride ion concentrations. SA508 acted as an anode and its corrosion rate was accelerated by galvanic coupling with Alloy 600.https://www.mdpi.com/1996-1944/13/8/1970molar ratio indexsteam generatortubesheetcrevice chemistrygalvanic couple |
| spellingShingle | Do Haeng Hur Jeoh Han Jun Choi Molar Ratio Effect of Sodium to Chloride Ions on the Electrochemical Corrosion of Alloy 600 and SA508 in HCl + NaOH Mixtures Materials molar ratio index steam generator tubesheet crevice chemistry galvanic couple |
| title | Molar Ratio Effect of Sodium to Chloride Ions on the Electrochemical Corrosion of Alloy 600 and SA508 in HCl + NaOH Mixtures |
| title_full | Molar Ratio Effect of Sodium to Chloride Ions on the Electrochemical Corrosion of Alloy 600 and SA508 in HCl + NaOH Mixtures |
| title_fullStr | Molar Ratio Effect of Sodium to Chloride Ions on the Electrochemical Corrosion of Alloy 600 and SA508 in HCl + NaOH Mixtures |
| title_full_unstemmed | Molar Ratio Effect of Sodium to Chloride Ions on the Electrochemical Corrosion of Alloy 600 and SA508 in HCl + NaOH Mixtures |
| title_short | Molar Ratio Effect of Sodium to Chloride Ions on the Electrochemical Corrosion of Alloy 600 and SA508 in HCl + NaOH Mixtures |
| title_sort | molar ratio effect of sodium to chloride ions on the electrochemical corrosion of alloy 600 and sa508 in hcl naoh mixtures |
| topic | molar ratio index steam generator tubesheet crevice chemistry galvanic couple |
| url | https://www.mdpi.com/1996-1944/13/8/1970 |
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