Effect of KOH concentration on corrosion behavior and surface morphology of stainless steel 316L for HHO generator application
Hydrogen production could be enhanced by increasing the potassium hydroxide (KOH) concentration, but higher KOH concentrations result in higher corrosion rates. Therefore, a deep investigation of the electrochemical behavior of stainless steel (SS 316L) in the KOH solution is needed. This study inv...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
International Association of Physical Chemists (IAPC)
2023-03-01
|
| Series: | Journal of Electrochemical Science and Engineering |
| Subjects: | |
| Online Access: | https://pub.iapchem.org/ojs/index.php/JESE/article/view/1615 |
| _version_ | 1797859168303972352 |
|---|---|
| author | Basori Basori Wan M. F. W. Mohamad Muhd R. Mansor Noreffendy Tamaldin Agung Iswandi Maman K. Ajiriyanto Ferry Budhi Susetyo |
| author_facet | Basori Basori Wan M. F. W. Mohamad Muhd R. Mansor Noreffendy Tamaldin Agung Iswandi Maman K. Ajiriyanto Ferry Budhi Susetyo |
| author_sort | Basori Basori |
| collection | DOAJ |
| description |
Hydrogen production could be enhanced by increasing the potassium hydroxide (KOH) concentration, but higher KOH concentrations result in higher corrosion rates. Therefore, a deep investigation of the electrochemical behavior of stainless steel (SS 316L) in the KOH solution is needed. This study investigates the influence of KOH concentrations on the electrochemical behavior, surface morphology, structure, and sample phases of SS 316L. The investigations were conducted by some electrochemical techniques, UV-vis, scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), and X-ray diffraction (XRD). The corrosion rate was found to increase, and solution resistance to decrease with increasing KOH concentration. Samples tested in 5, 30, and 50 g l-1 of KOH showed corrosion rates of 0.457, 2.362, and 5.613 µm year-1, respectively. A wide passive region and the noblest pitting potential were noticed for the sample with 5 g l-1 of KOH. Moreover, Mott-Schottky plots and characteristic wavelengths of UV-Vis suggest the formation of iron and chromium oxides by the passivation of samples. The SEM analysis showed a dynamic change of surface morphology from the lowest to the highest concentration with the intergranular corrosion found at the grain boundaries area. In conclusion, concentrations < 50 g l-1 KOH could be recommended since they would support the optimum remaining life of SS 316 L plates in HHO generators.
|
| first_indexed | 2024-04-09T21:25:06Z |
| format | Article |
| id | doaj.art-9f5ccc59f65544cb99ff96dd60863b10 |
| institution | Directory Open Access Journal |
| issn | 1847-9286 |
| language | English |
| last_indexed | 2024-04-09T21:25:06Z |
| publishDate | 2023-03-01 |
| publisher | International Association of Physical Chemists (IAPC) |
| record_format | Article |
| series | Journal of Electrochemical Science and Engineering |
| spelling | doaj.art-9f5ccc59f65544cb99ff96dd60863b102023-03-27T20:02:19ZengInternational Association of Physical Chemists (IAPC)Journal of Electrochemical Science and Engineering1847-92862023-03-0110.5599/jese.1615Effect of KOH concentration on corrosion behavior and surface morphology of stainless steel 316L for HHO generator applicationBasori Basori0Wan M. F. W. Mohamad1Muhd R. Mansor2Noreffendy Tamaldin3Agung Iswandi4Maman K. Ajiriyanto5Ferry Budhi Susetyo6Department of Mechanical Engineering, Faculty of Engineering and Science, Universitas Nasional, Sawo Manila, Pasar Minggu, Jakarta 12520, Indonesia and Fakulti Kejuruteraan Mekanikal, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, MalaysiaFakulti Kejuruteraan Mekanikal, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia and Centre for Advanced Research on Energy, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, MalaysiaFakulti Kejuruteraan Mekanikal, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia and Centre for Advanced Research on Energy, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, MalaysiaFakulti Kejuruteraan Mekanikal, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia and Centre for Advanced Research on Energy, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, MalaysiaDepartment of Mechanical Engineering, Faculty of Engineering and Science, Universitas Nasional, Sawo Manila, Pasar Minggu, Jakarta 12520, IndonesiaResearch Center for Nuclear Fuel Cycle and Radioactive Waste Technology – National Research and Innovation Agency (BRIN), 15314, IndonesiaDepartment of Mechanical Engineering, Universitas Negeri Jakarta, Jakarta 13220, Indonesia Hydrogen production could be enhanced by increasing the potassium hydroxide (KOH) concentration, but higher KOH concentrations result in higher corrosion rates. Therefore, a deep investigation of the electrochemical behavior of stainless steel (SS 316L) in the KOH solution is needed. This study investigates the influence of KOH concentrations on the electrochemical behavior, surface morphology, structure, and sample phases of SS 316L. The investigations were conducted by some electrochemical techniques, UV-vis, scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), and X-ray diffraction (XRD). The corrosion rate was found to increase, and solution resistance to decrease with increasing KOH concentration. Samples tested in 5, 30, and 50 g l-1 of KOH showed corrosion rates of 0.457, 2.362, and 5.613 µm year-1, respectively. A wide passive region and the noblest pitting potential were noticed for the sample with 5 g l-1 of KOH. Moreover, Mott-Schottky plots and characteristic wavelengths of UV-Vis suggest the formation of iron and chromium oxides by the passivation of samples. The SEM analysis showed a dynamic change of surface morphology from the lowest to the highest concentration with the intergranular corrosion found at the grain boundaries area. In conclusion, concentrations < 50 g l-1 KOH could be recommended since they would support the optimum remaining life of SS 316 L plates in HHO generators. https://pub.iapchem.org/ojs/index.php/JESE/article/view/1615Corrosion rateKOH mediapassive filmhydrogen generator |
| spellingShingle | Basori Basori Wan M. F. W. Mohamad Muhd R. Mansor Noreffendy Tamaldin Agung Iswandi Maman K. Ajiriyanto Ferry Budhi Susetyo Effect of KOH concentration on corrosion behavior and surface morphology of stainless steel 316L for HHO generator application Journal of Electrochemical Science and Engineering Corrosion rate KOH media passive film hydrogen generator |
| title | Effect of KOH concentration on corrosion behavior and surface morphology of stainless steel 316L for HHO generator application |
| title_full | Effect of KOH concentration on corrosion behavior and surface morphology of stainless steel 316L for HHO generator application |
| title_fullStr | Effect of KOH concentration on corrosion behavior and surface morphology of stainless steel 316L for HHO generator application |
| title_full_unstemmed | Effect of KOH concentration on corrosion behavior and surface morphology of stainless steel 316L for HHO generator application |
| title_short | Effect of KOH concentration on corrosion behavior and surface morphology of stainless steel 316L for HHO generator application |
| title_sort | effect of koh concentration on corrosion behavior and surface morphology of stainless steel 316l for hho generator application |
| topic | Corrosion rate KOH media passive film hydrogen generator |
| url | https://pub.iapchem.org/ojs/index.php/JESE/article/view/1615 |
| work_keys_str_mv | AT basoribasori effectofkohconcentrationoncorrosionbehaviorandsurfacemorphologyofstainlesssteel316lforhhogeneratorapplication AT wanmfwmohamad effectofkohconcentrationoncorrosionbehaviorandsurfacemorphologyofstainlesssteel316lforhhogeneratorapplication AT muhdrmansor effectofkohconcentrationoncorrosionbehaviorandsurfacemorphologyofstainlesssteel316lforhhogeneratorapplication AT noreffendytamaldin effectofkohconcentrationoncorrosionbehaviorandsurfacemorphologyofstainlesssteel316lforhhogeneratorapplication AT agungiswandi effectofkohconcentrationoncorrosionbehaviorandsurfacemorphologyofstainlesssteel316lforhhogeneratorapplication AT mamankajiriyanto effectofkohconcentrationoncorrosionbehaviorandsurfacemorphologyofstainlesssteel316lforhhogeneratorapplication AT ferrybudhisusetyo effectofkohconcentrationoncorrosionbehaviorandsurfacemorphologyofstainlesssteel316lforhhogeneratorapplication |