Evaluation of the Pitting Corrosion of Modified Martensitic Stainless Steel in CO<sub>2</sub> Environment Using Point Defect Model
Pitting corrosion is a significant concern for the broader application of stainless steel in modern industries in which metal and metal alloy are detached preferentially from susceptible parts on the surface, resulting in the creation of holes in passivated alloys that are exposed to an aqueous, neu...
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MDPI AG
2022-01-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/12/2/233 |
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| author | Ahmed Bahgat Radwan Abdraman M. Moussa Noora H. Al-Qahtani Raymundo Case Homero Castaneda Aboubakr M. Abdullah Muhsen A. M. El-Haddad Jolly Bhadra Noora Jabor Al-Thani |
| author_facet | Ahmed Bahgat Radwan Abdraman M. Moussa Noora H. Al-Qahtani Raymundo Case Homero Castaneda Aboubakr M. Abdullah Muhsen A. M. El-Haddad Jolly Bhadra Noora Jabor Al-Thani |
| author_sort | Ahmed Bahgat Radwan |
| collection | DOAJ |
| description | Pitting corrosion is a significant concern for the broader application of stainless steel in modern industries in which metal and metal alloy are detached preferentially from susceptible parts on the surface, resulting in the creation of holes in passivated alloys that are exposed to an aqueous, neutral electrolyte containing corrosive species. Exposure of SS to brines leads to the localized loss of surface passivity and the onset of isolated pitting, which render the equipment or piping unfit for service. In the present study, the passive layer behavior and the pitting corrosion of the modified martensitic stainless steel (MMSS) were evaluated in a saturated CO<sub>2</sub> environment (pH~5) with different NaCl concentrations and temperatures, using various electrochemical techniques. It was found that by increasing the temperature up to 60 °C, the corrosion resistance of the MMSS increased; however, the corrosion rate dramatically increased at 80 °C, indicating the destruction of the oxide layer. According to the point defect model (PDM) results, the calculated values of polarizability (<i>α</i>), metal cation diffusivity (<i>D</i>), and the rate of annihilation of cation vacancies (<i>j<sub>m</sub></i>), reveal a strong dependence on the solution temperature. |
| first_indexed | 2024-03-09T21:26:17Z |
| format | Article |
| id | doaj.art-16b1c113080543ec8f4a5abe4dc15f92 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T21:26:17Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-16b1c113080543ec8f4a5abe4dc15f922023-11-23T21:07:06ZengMDPI AGMetals2075-47012022-01-0112223310.3390/met12020233Evaluation of the Pitting Corrosion of Modified Martensitic Stainless Steel in CO<sub>2</sub> Environment Using Point Defect ModelAhmed Bahgat Radwan0Abdraman M. Moussa1Noora H. Al-Qahtani2Raymundo Case3Homero Castaneda4Aboubakr M. Abdullah5Muhsen A. M. El-Haddad6Jolly Bhadra7Noora Jabor Al-Thani8Center for Advanced Materials, Qatar University, Doha P.O. Box 2713, QatarQatar University Young Scientist Center (QUYSC), Qatar University, Doha P.O. Box 2713, QatarCenter for Advanced Materials, Qatar University, Doha P.O. Box 2713, QatarDepartment of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USADepartment of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USACenter for Advanced Materials, Qatar University, Doha P.O. Box 2713, QatarQatargas Operating Company Limited, Doha P.O. Box 22666, QatarCenter for Advanced Materials, Qatar University, Doha P.O. Box 2713, QatarQatar University Young Scientist Center (QUYSC), Qatar University, Doha P.O. Box 2713, QatarPitting corrosion is a significant concern for the broader application of stainless steel in modern industries in which metal and metal alloy are detached preferentially from susceptible parts on the surface, resulting in the creation of holes in passivated alloys that are exposed to an aqueous, neutral electrolyte containing corrosive species. Exposure of SS to brines leads to the localized loss of surface passivity and the onset of isolated pitting, which render the equipment or piping unfit for service. In the present study, the passive layer behavior and the pitting corrosion of the modified martensitic stainless steel (MMSS) were evaluated in a saturated CO<sub>2</sub> environment (pH~5) with different NaCl concentrations and temperatures, using various electrochemical techniques. It was found that by increasing the temperature up to 60 °C, the corrosion resistance of the MMSS increased; however, the corrosion rate dramatically increased at 80 °C, indicating the destruction of the oxide layer. According to the point defect model (PDM) results, the calculated values of polarizability (<i>α</i>), metal cation diffusivity (<i>D</i>), and the rate of annihilation of cation vacancies (<i>j<sub>m</sub></i>), reveal a strong dependence on the solution temperature.https://www.mdpi.com/2075-4701/12/2/233corrosionmartensitic stainless steelpoint defect modelcation vacanciespitting |
| spellingShingle | Ahmed Bahgat Radwan Abdraman M. Moussa Noora H. Al-Qahtani Raymundo Case Homero Castaneda Aboubakr M. Abdullah Muhsen A. M. El-Haddad Jolly Bhadra Noora Jabor Al-Thani Evaluation of the Pitting Corrosion of Modified Martensitic Stainless Steel in CO<sub>2</sub> Environment Using Point Defect Model Metals corrosion martensitic stainless steel point defect model cation vacancies pitting |
| title | Evaluation of the Pitting Corrosion of Modified Martensitic Stainless Steel in CO<sub>2</sub> Environment Using Point Defect Model |
| title_full | Evaluation of the Pitting Corrosion of Modified Martensitic Stainless Steel in CO<sub>2</sub> Environment Using Point Defect Model |
| title_fullStr | Evaluation of the Pitting Corrosion of Modified Martensitic Stainless Steel in CO<sub>2</sub> Environment Using Point Defect Model |
| title_full_unstemmed | Evaluation of the Pitting Corrosion of Modified Martensitic Stainless Steel in CO<sub>2</sub> Environment Using Point Defect Model |
| title_short | Evaluation of the Pitting Corrosion of Modified Martensitic Stainless Steel in CO<sub>2</sub> Environment Using Point Defect Model |
| title_sort | evaluation of the pitting corrosion of modified martensitic stainless steel in co sub 2 sub environment using point defect model |
| topic | corrosion martensitic stainless steel point defect model cation vacancies pitting |
| url | https://www.mdpi.com/2075-4701/12/2/233 |
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