Corrosion of aluminium alloy 1100 in post-LOCA solutions of a nuclear reactor
By Guo, S.; Leavitt, J. J.; Zhou, X.; Lahti, E.; Zhang, J.
Published in RSC Adv
The Royal Society of Chemistry
2016
Abstract
The corrosion and release of aluminum alloy 1100 in characteristic solutions in the containment sump of a nuclear reactor after a loss-of-coolant accident has been studied by an integral approach of electrochemical characterization and solution analysis by inductively coupled plasma (ICP) techniques. Various temperatures and pHs for a reactor in post-LOCA conditions are investigated to identify the effects of the temperature and solution composition on the corrosion. It was found that the oxygen reduction dominants the cathodic reaction below 55 [degree]C, while water reduction becomes more pronounced at a higher temperature. The adsorption of boron on aluminum was identified by electrochemical impedance spectroscopy (EIS) and X-ray photoelectron spectroscopy (XPS). The boron adsorption decreased the thickness of the passive film by increasing the aluminum hydroxide solubilities, resulting in a very thin (<1.5 nm) passive film in the high boron concentrated post-LOCA solutions. The aluminium corrosion rate and passive film resistance obey an Arrhenius-type correlation with temperature in post-LOCA solutions. The slopes of the logarithmic release rate of aluminium in post-LOCA solutions against the pH and the reciprocal temperature are found to keep constant in solutions with a pH between pH 4-12, and a temperature range of 25 to 130 [degree]C.
Microsoft is Ending Support for Windows 7
Microsoft will discontinue support for Windows 7 on January 14, 2020 which means Gamry will also be discontinuing support for Windows 7. If you are upgrading to Windows 10, like many companies and institutions, you need to be running Version 7 of our s oftware . Please note that only USB and Ethernet-based instruments can run in Version 7. Eligible users can download the latest version of our software through our online Client Portal .
If you haven't already registered your instrument, you can do so through the Client Portal .
Please email Technical Support if you have any questions regarding this transition. Please be sure to include your instrument model and serial number when contacting us.