Resistance Improvement of Aluminum Surface to Corrosion Through Reactions With Fluoride IonsSource: Journal of Nuclear Engineering and Radiation Science:;2017:;volume( 003 ):;issue: 003::page 30914DOI: 10.1115/1.4036432Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The reaction of fluoride ions with alumina was found to strongly depend on the concentration of fluoride ions in the aqueous solution. At low concentrations ([fluoride ions] < 0.1 mol/l in the case of potassium fluoride), the aqueous concentration of aluminum ions is relatively high as measured by using inductively coupled plasma optical emission spectroscopy (ICP-OES), and the aluminum oxide dissolves as a fluoride complex. At high concentrations of fluoride ([fluoride ions] > 0.5 mol/l in the case of potassium fluoride), a new structure is formed on the alumina surface involving fluoride, aluminum, potassium, and oxygen (in the case of potassium fluoride). The structure was characterized by using X-ray powder diffraction (XRD), scanning electron microscope (SEM), and energy-dispersive X-ray spectroscopy (EDS). The resulting structure improved the passivation of alumina, the solubility of aluminum ions decreasing compared to the untreated alumina. Aluminum surfaces that were fluoride-treated showed a better resistance to dissolution in both acidic and basic media.
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| contributor author | Saphier, Magal | |
| contributor author | Zamir, Oron | |
| contributor author | Berzansky, Polina | |
| contributor author | Saphier, Oshra | |
| contributor author | Meyerstein, Dan | |
| date accessioned | 2017-11-25T07:18:42Z | |
| date available | 2017-11-25T07:18:42Z | |
| date copyright | 2017/25/5 | |
| date issued | 2017 | |
| identifier issn | 2332-8983 | |
| identifier other | ners_003_03_030914.pdf | |
| identifier uri | http://138.201.223.254:8080/yetl1/handle/yetl/4235334 | |
| description abstract | The reaction of fluoride ions with alumina was found to strongly depend on the concentration of fluoride ions in the aqueous solution. At low concentrations ([fluoride ions] < 0.1 mol/l in the case of potassium fluoride), the aqueous concentration of aluminum ions is relatively high as measured by using inductively coupled plasma optical emission spectroscopy (ICP-OES), and the aluminum oxide dissolves as a fluoride complex. At high concentrations of fluoride ([fluoride ions] > 0.5 mol/l in the case of potassium fluoride), a new structure is formed on the alumina surface involving fluoride, aluminum, potassium, and oxygen (in the case of potassium fluoride). The structure was characterized by using X-ray powder diffraction (XRD), scanning electron microscope (SEM), and energy-dispersive X-ray spectroscopy (EDS). The resulting structure improved the passivation of alumina, the solubility of aluminum ions decreasing compared to the untreated alumina. Aluminum surfaces that were fluoride-treated showed a better resistance to dissolution in both acidic and basic media. | |
| publisher | The American Society of Mechanical Engineers (ASME) | |
| title | Resistance Improvement of Aluminum Surface to Corrosion Through Reactions With Fluoride Ions | |
| type | Journal Paper | |
| journal volume | 3 | |
| journal issue | 3 | |
| journal title | Journal of Nuclear Engineering and Radiation Science | |
| identifier doi | 10.1115/1.4036432 | |
| journal fristpage | 30914 | |
| journal lastpage | 030914-3 | |
| tree | Journal of Nuclear Engineering and Radiation Science:;2017:;volume( 003 ):;issue: 003 | |
| contenttype | Fulltext |